Survey Meters

Nuclear Dynamics Pty Ltd supplies Ludlum radiation survey meters in South Africa.
Portable survey meters for contamination checks, dose rate measurement and field monitoring, including ground and floor surveying equipment.

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Computerized Survey Meters

Ludlum Model 4404-16 Series

Ludlum Model 4404-16 Series

  • Features
    • Large Area Outdoor Survey Meter
    • NaI Scintillator Detector
    • Multi-Single-Channel Analyzers
    • Data Logging Program
    • Google Earth™ Compatible Files 
More Info
Ludlum Model 4600 Series

Ludlum Model 4600 Series

  • Features
    • 1 to 12 Detector Single Channel Analyzer
    • Supports G-M, Proportional & Scintillator Detectors
    • Independently Adjustable HV, Threshold, Window, Scaler Count Time & Output Time for Each Channel
    • HV Range: 0 to 1500 V or 0 to 2500 V
  • Configurations
    • Model 4601 (P/N 48-3284)
    • Model 4602 (P/N 48-3631)
    • Model 4603 (P/N 48-3241)
    • Model 4605 (P/N 48-3414)
    • Model 4606 (P/N 48-3242)
    • Model 4607 (P/N 48-3412)
    • Model 4608 (P/N 48-3723)
    • Model 4609 (P/N 48-3413)
    • Model 4610 (P/N 48-3697)
    • Model 4612 (P/N 48-3237)
More Info

Data Loggers

Ludlum Model 2350-1

Ludlum Model 2350-1

  • Features
    • 5-Range Digital Meter
    • Supports GM, Proportional & Scintillator Detectors
    • Stores 1000 Data Points
    • Supports 16 Detector Setups
  • Replacement Parts
    • Meter Bezel (P/N 4371-024)
    • LCD Display (serial numbers 266658 and less) (P/N 07-6334)
    • LCD Display (serial numbers 266659 and greater) (P/N 07-6596)
    • Handle without Pushbutton (P/N 4371-011)
    • Handle with Pushbutton (P/N 4371-027)
More Info
Ludlum Model 2360

Ludlum Model 2360

  • Features
    • For Alpha-Beta Surveying
    • 4-Range Analog Meter with Digital Scaler LCD
    • Supports Alpha-Beta Proportional & Scintillator Detectors
    • Stores 550 Data Points
More Info
Ludlum Model 3000

Ludlum Model 3000

  • Features
    • Supports GM, Proportional & Scintillation Detectors
    • Optional Data Logging Capability
More Info
Ludlum Model 3001

Ludlum Model 3001

  • Features
    • Supports GM, Proportional & Scintillation Detectors
    • Stores Up To 4 Detector Set-Ups
    • Optional Data Logging Capability
More Info
Ludlum Model 3002

Ludlum Model 3002

  • Features
    • Supports Alpha-Beta Proportional & Scintillation Detectors
    • Includes Data Logging Capability
More Info
Ludlum Model 3003 Series

Ludlum Model 3003 Series

  • Features
    • Supports GM, Proportional, Scintillation & Neutron Detectors
    • Stores Up To 4 Detector Set-Ups
    • Internal Detector Option for Accumulated Dose
    • Includes Data Logging Capability
  • Configurations
    • Model 3003i (P/N 48-4326)
    • Model 3003i/1 (P/N 48-4378)
    • Model 3003i/3 (P/N 48-4365-3)
    • Model 3003i/4 (P/N 48-4365-4)
    • Model 3003i/6 (P/N 48-4326-6)
More Info
Ludlum Model 3005

Ludlum Model 3005

  • Features
    • Auto-Ranging Digital Meter
    • Internal Energy-Compensated GM Detector
    • Range: Background to 50 mSv/h (5 R/hr), others available
    • Includes Data Logging Capability 
  • Configurations
    • Model 3005/3 (P/N 48-4281)
    • Model 3005/4 (P/N 48-4259)
More Info
Ludlum Model 3014

Ludlum Model 3014

  • Features
    • Supports GM, Proportional & Scintillation Detectors
    • Internal Detector for Accumulated Dose
    • Data Logging Capability
    • Single Channel Analyzer (SCA) Capable
  • Configurations
    • Model 3014/1 (P/N 48-4365-1)
    • Model 3014/3 (P/N 48-4365-3)
    • Model 3014/4 (P/N 48-4365-4)
    • Model 3014/6 (P/N 48-4365-6)
More Info
Ludlum Model 3019

Ludlum Model 3019

  • Features
    • Digital Meter
    • Internal 2.5 x 1.9 cm (1 x 0.75 in.) CsI Scintillator Detector
    • Sensitivity (137Cs): 17,500 cpm per µSv/h (175 cpm per µR/hr)
    • Range: Background to 500 µSv/h (50 mR/hr)
    • Alarms
More Info
Ludlum Model 3192

Ludlum Model 3192

  • Features
    • Digital Meter
    • Internal 5.1 x 2.5 cm (2 x 1 in.) NaI Scintillator Detector
    • Sensitivity (137Cs): 65,000 cpm per μSv/h (650 cpm per μR/hr)
    • Range: Background to 50 μSv/h (0 to 5,000 μR/hr)
    • Alarms
More Info

Extended Reach microR / microSv Meters

Ludlum Model 193-6

Ludlum Model 193-6

  • Description
    • Extended Reach Gamma microR Survey Meter 15.2 x 2.5 cm (6 x 1 in.) plastic scintillator detector mounted to end of a 1.2 m (4 ft.) pole with Model 193 meter.
  • Part Number
    • 48-3063
More Info
Ludlum Model 30-6

Ludlum Model 30-6

  • Description
    • Extended Reach Gamma microR Survey Meter 15.2 x 2.5 cm (6 x 1 in.) plastic scintillator detector mounted to end of an adjustable length pole with Model 30 meter. Pole adjustable from 111 to 161 cm (43.6 to 63.4 in.) with 11 different settings.
  • Part Number
    • 48-4195
More Info
Ludlum Model 3006

Ludlum Model 3006

  • Description
    • Extended Reach Gamma microR Survey Meter 15.2 x 2.5 cm (6 x 1 in.) plastic scintillator detector mounted to end of a 118 cm (46.5 in.) pole with Model 3000 Series meter.
  • Part Number
    • 48-4284
More Info

Friskers

Ludlum Model 26

Ludlum Model 26

  • Features
    • Pancake GM Detector
    • Units: cps, cpm
More Info
Ludlum Model 26-1 Series

Ludlum Model 26-1 Series

  • Features
    • Pancake GM Detector
    • Units: cps, cpm, µSv/h, mR/hr, dpm, Bq
    • Dose Equivalent Filter Option
More Info
Ludlum Model 26-2

Ludlum Model 26-2

  • Features
    • Pancake GM Detector
    • Units: cps, cpm
    • 3 Alarm Levels
More Info
Ludlum Model 26-3

Ludlum Model 26-3

  • Features
    • Pancake GM Detector
    • Units: cps, cpm, µSv/h, mR/hr, dpm, Bq
    • Dead-Time Correction Allowing Gamma Measurements up to 1000 mR/hr (1999 µSv/h)
More Info
Ludlum Model 26S

Ludlum Model 26S

  • Features
    • Scintillation Detector
    • Units: cps, cpm, µSv/h, mR/hr, dpm, Bq
More Info

Geiger Counters

Ludlum Model 3005

Ludlum Model 3005

  • Features
    • Auto-Ranging Digital Meter
    • Internal Energy-Compensated GM Detector
    • Range: Background to 50 mSv/h (5 R/hr), others available
    • Includes Data Logging Capability 
  • Configurations
    • Model 3005/3 (P/N 48-4281)
    • Model 3005/4 (P/N 48-4259)
More Info
Ludlum Model 5

Ludlum Model 5

  • Features
    • 5-Range Analog Meter
    • Two Internal Energy-Compensated GM Detectors
    • Range: 0 to 20 mSv/h (0 to 2000 mR/hr) 
  • Replacement Parts
    • GM Tube, Low Range (P/N 01-5295)
    • GM Tube, High Range (P/N 01-5306)
More Info
Ludlum Model 6

Ludlum Model 6

  • Features
    • 3-Range Analog Meter
    • Internal Energy-Compensated GM Detector
    • Range: 0 to 10 mSv/h (0 to 1000 mR/hr)
  • Replacement Parts
    • GM Tube (P/N 01-5306)
More Info

General Purpose - Analog

Ludlum Model 12

Ludlum Model 12

  • Features
    • 4-Range Analog Survey Meter
    • Supports GM, Proportional & Scintillation Detectors
More Info
Ludlum Model 14C

Ludlum Model 14C

  • Features
    • 5-Range Analog Survey Meter
    • Operates Two Detectors
      • Internal: GM Detector (0 - 2000 mR/hr)
      • External: Supports GM & Scintillation Detectors
  • Replacement Parts
    • Internal GM Tube Assembly (P/N 4331-020)
More Info
Ludlum Model 16

Ludlum Model 16

  • Features
    • 4-Range Analog Survey Meter
    • Supports GM, Proportional & Scintillation Detectors
    • Adjustable Window
More Info
Ludlum Model 18

Ludlum Model 18

  • Features
    • 4-Range Analog Survey Meter
    • Supports GM, Proportional & Scintillation Detectors
    • Adjustable Window
    • 3 Detector Setups
More Info
Ludlum Model 2402

Ludlum Model 2402

  • Features
    • 3-Range Analog Meter
    • Supports GM & Scintillation Detectors
    • Alarm
More Info
Ludlum Model 2403

Ludlum Model 2403

  • Features
    • 4-Range Analog Meter
    • Supports GM & Scintillator Detectors
More Info
Ludlum Model 3

Ludlum Model 3

  • Features
    • 4-Range Analog Survey Meter
    • Supports GM & Scintillation Detectors
More Info
Ludlum Model 3A

Ludlum Model 3A

  • Features
    • 4-Range Analog Survey Meter
    • Supports GM & Scintillation Detectors
    • Alarm
More Info

General Purpose - Digital

Ludlum Model 30

Ludlum Model 30

  • Features
    • Attaches to Detector Allowing One-Handed Operation
    • Supports GM, Proportional & Scintillation Detectors
More Info
Ludlum Model 3000

Ludlum Model 3000

  • Features
    • Supports GM, Proportional & Scintillation Detectors
    • Optional Data Logging Capability
More Info
Ludlum Model 3001

Ludlum Model 3001

  • Features
    • Supports GM, Proportional & Scintillation Detectors
    • Stores Up To 4 Detector Set-Ups
    • Optional Data Logging Capability
More Info
Ludlum Model 3002

Ludlum Model 3002

  • Features
    • Supports Alpha-Beta Proportional & Scintillation Detectors
    • Includes Data Logging Capability
More Info
Ludlum Model 3003 Series

Ludlum Model 3003 Series

  • Features
    • Supports GM, Proportional, Scintillation & Neutron Detectors
    • Stores Up To 4 Detector Set-Ups
    • Internal Detector Option for Accumulated Dose
    • Includes Data Logging Capability
  • Configurations
    • Model 3003i (P/N 48-4326)
    • Model 3003i/1 (P/N 48-4378)
    • Model 3003i/3 (P/N 48-4365-3)
    • Model 3003i/4 (P/N 48-4365-4)
    • Model 3003i/6 (P/N 48-4326-6)
More Info
Ludlum Model 3014

Ludlum Model 3014

  • Features
    • Supports GM, Proportional & Scintillation Detectors
    • Internal Detector for Accumulated Dose
    • Data Logging Capability
    • Single Channel Analyzer (SCA) Capable
  • Configurations
    • Model 3014/1 (P/N 48-4365-1)
    • Model 3014/3 (P/N 48-4365-3)
    • Model 3014/4 (P/N 48-4365-4)
    • Model 3014/6 (P/N 48-4365-6)
More Info
Ludlum Model 35

Ludlum Model 35

  • Features
    • Vehicle Mounted Digital Survey Meter
    • Supports GM, Proportional & Scintillation Detectors
More Info

Ground/Floor Surveying Instruments

Ludlum Model 30 with Telescoping Pole

Ludlum Model 30 with Telescoping Pole

  • Description
    • Digital Meter Attached to Telescoping Pole Can be used with various GM and scintillation detectors Pole lengths:
      • 1.2 to 2.4 m (4 to 8 ft.) [PN 4498-865]
      • 1.8 to 3.7 m (6 to 12 ft.) [PN 4498-865-1]
  • Part Number
    •  48-4108 (Model 30)
More Info
Ludlum Model 44-10 with Cane

Ludlum Model 44-10 with Cane

  • Description
    • Option to attach the Model 44-10 to a walking cane
  • Part Number
    • 4525-1109
More Info
Ludlum Model 44-10 with Extension Handle

Ludlum Model 44-10 with Extension Handle

  • Description
    • Adjustable length handle option for the Model 44-10
  • Part Number
    • 4002-1159
More Info
Ludlum Model 44-213 Ground Stand

Ludlum Model 44-213 Ground Stand

  • Description
    • Stand option for Model 44-213 FIDLER detector
  • Part Number
    • 2574-102
More Info
Ludlum Model 193-6

Ludlum Model 193-6

  • Description
    • Extended Reach Gamma microR Survey Meter 15.2 x 2.5 cm (6 x 1 in.) plastic scintillator detector mounted to end of a 1.2 m (4 ft.) pole with Model 193 meter.
  • Part Number
    • 48-3063
More Info
Ludlum Model 239-1F Series

Ludlum Model 239-1F Series

  • Features
    • Alpha-Beta-Gamma Gas Proportional Detector
    • Active Window Area: 584 cm2 (90.5 in2)
    • Adjustable Detector Height
  • Configurations
    • Model 43-37, Model 3002 (P/N 48-2974-2)
    • Model 43-37, Model 3003 (P/N 48-2974-4)
    • Model 43-37, Model 12 (P/N 48-1702)
    • Model 43-37, Model 2350-1 (P/N 48-2594)
    • Model 43-37, Model 2360 (P/N 48-2922)
    • Model 43-37-1, Model 3002 (P/N 48-2974-1)
    • Model 43-37-1, Model 3003 (P/N 48-2974-3)
    • Model 43-37-1, Model 2350-1 (P/N 48-3060)
    • Model 43-37-1, Model 2360 (P/N 48-2974)
  • Replacement Parts
    • Model 43-37 Gas Proportional Detector (P/N 47-1143)
    • Model 43-37 Window Assembly (P/N 4304-017)
    • Model 43-37-1 Gas Proportional Detector (P/N 47-2243)
More Info
Ludlum Model 240 Series

Ludlum Model 240 Series

  • Features
    • 12 Alpha-Beta Detector Array
    • 173 cm (68 in.) Wide Detection Path
    • Floor and Wall Monitoring
  • Configurations
    • Model 240S (P/N 48-4131)
    • Model 240-1 (P/N 48-4122)
    • Model 240S-1 (P/N 48-4132)
    • Model 240 / 240S without Accessories (P/N 4304-199)
    • Model 240-1 / 240S-1 without Accessories (P/N 4304-297)
More Info
Ludlum Model 30-6

Ludlum Model 30-6

  • Description
    • Extended Reach Gamma microR Survey Meter 15.2 x 2.5 cm (6 x 1 in.) plastic scintillator detector mounted to end of an adjustable length pole with Model 30 meter. Pole adjustable from 111 to 161 cm (43.6 to 63.4 in.) with 11 different settings.
  • Part Number
    • 48-4195
More Info
Ludlum Model 3002/FM Series

Ludlum Model 3002/FM Series

  • Features
    • Alpha-Beta Scintillation Detectors
    • Active Window Area: 400 or 1080 cm2 (62 or 167.4 in2)
    • 22.4, 40.9, or 65.7 cm (8.8, 16.1, or 25.9 in.) Wide Detection Path
    • Adjustable Detector Height
More Info
Ludlum Model 3006

Ludlum Model 3006

  • Description
    • Extended Reach Gamma microR Survey Meter 15.2 x 2.5 cm (6 x 1 in.) plastic scintillator detector mounted to end of a 118 cm (46.5 in.) pole with Model 3000 Series meter.
  • Part Number
    • 48-4284
More Info
Ludlum Model 239-BW

Ludlum Model 239-BW

  • Description
    • Roll-around cart for large area detector (detector not included) Variant of Model 239-1F with larger wheels Compatible Detectors:
      • Model 43-37 Large Area Gas Proportional Detector
      • Model 43-37-1 Large Area Gas Proportional Detector
      • Model 44-122-1 Large Area GM Detector (12 pancake GMs)
      • Model 44-122-2 Large Area GM Detector (36 pancake GMs)
      Other configurations available on request
  • Part Number
    • 48-3178
More Info
Ludlum Model 44-122-3

Ludlum Model 44-122-3

  • Description
    • Large Area Alpha-Beta-Gamma Pancake GM Detector 5 pancake GM detector array with wheels
      • Product Manual
  • Part Number
    • 47-4218
More Info
Ludlum Model 43-57-1

Ludlum Model 43-57-1

  • Description
    • Large Area Alpha-Beta Gas Proportional Detector Variant of Model 43-37 with larger area and wheels
  • Part Number
    • 47-4085
More Info
Ludlum Model 43-37-2

Ludlum Model 43-37-2

  • Description
    • Large Area Alpha-Beta Gas Proportional Detector Variant of Model 43-37 with wheels
  • Part Number
    • 47-2314
More Info

Intrinsically Safe

Ludlum Model 25-IS Series

Ludlum Model 25-IS Series

  • Features
    • Intrinsically Safe
    • Dose Rate and Accumulated Dose Alarms
    • Range: 0.02 mSv/h to 9.99 Sv/h (2 mR/hr to 999 R/hr)
More Info
Ludlum Model 3-IS

Ludlum Model 3-IS

  • Features
    • 4-Range Analog Meter
    • Supports Select GM & Scintillator Detectors 
More Info
Ludlum Model 3-IS-1

Ludlum Model 3-IS-1

  • Features
    • 4-Range Analog Meter
    • Internal Energy-Compensated GM Detector
More Info

Ion Chambers

Ludlum Model 9-3

Ludlum Model 9-3

  • Features
    • 5-Range Analog Meter
    • Range: 0 to 500 mSv/h (0 to 50 R/h)
    • Temperature Compensated
    • Retractable Beta Shield
More Info
Ludlum Model 9-4

Ludlum Model 9-4

  • Features
    • 5-Range Analog Meter
    • Range: 0 to 500 mSv/h (0 to 50 R/hr)
    • Temperature & Pressure Compensated
    • Retractable Beta Shield
More Info
Ludlum Model 9-4RF

Ludlum Model 9-4RF

  • Features
    • RF Immunity
    • 5-Range Analog Meter
    • Range: 0 to 500 mSv/h (0 to 50 R/hr)
    • Temperature & Pressure Compensated
    • Retractable Beta Shield
More Info
Ludlum Model 9-7

Ludlum Model 9-7

  • Features
    • Digital Meter
    • Display Range: 0.001 R/hr to 19.99 kR/hr
    • Four Available Detectors
    • Replacement for Eberline Model RO-7
More Info
Ludlum Model 9-7S

Ludlum Model 9-7S

  • Features
    • Digital Meter
    • 1.1 to 3.8 m (3.7 to 12.6 ft.) Telescoping Stainless Steel Pole
    • Display Range: 0.001 R/hr to 19.99 kR/hr
    • Four Available Detectors
More Info
Ludlum Model 9DP

Ludlum Model 9DP

  • Features
    • Color LCD Digital Meter
    • Range: Background to 50 mSv/h (5 R/hr)
    • Chamber Pressure: 9 atm (122 psig)
  • Replacement Parts
    • Model 9DP Series Wall Charger (P/N 2313843)
More Info
Ludlum Model 9DP-1

Ludlum Model 9DP-1

  • Features
    • Color LCD Digital Meter
    • Range: 2 µSv/h to 500 mSv/h (200 µR/hr to 50 R/hr)
    • Chamber Pressure: 2.5 atm (22 psig) [Non-HAZMAT] 
  • Replacement Parts
    • Model 9DP Series Wall Charger (P/N 2313843)
More Info
Ludlum Model 9DP-1*

Ludlum Model 9DP-1*

  • Features
    • Color LCD Digital Meter
    • Range: 2 µSv/h to 500 mSv/h (200 µR/hr to 50 R/hr)
    • Chamber Pressure: 2.5 atm (22 psig) [Non-HAZMAT]
    • Provides ICRU-Based Ambient Dose Measurements
  • Replacement Parts
    • Model 9DP Series Wall Charger (P/N 2313843)
More Info
Ludlum Model 9DP*

Ludlum Model 9DP*

  • Features
    • Color LCD Digital Meter
    • Range: Background to 50 mSv/h (5 R/hr)
    • Chamber Pressure: 9 atm (122 psig)
    • Provides ICRU-Based Ambient Dose  Equivalent Measurements
  • Replacement Parts
    • Model 9DP Series Wall Charger (P/N 2313843)
More Info

Isotope Identifiers

Ludlum Model 732

Ludlum Model 732

  • Features
    • 1024 Channel MCA
    • 5.1 x 5.1 cm (2 x 2 in.) NaI Detector
More Info
Ludlum Model 733

Ludlum Model 733

  • Features
    • 1024 Channel MCA
    • 7.6 x 7.6 cm (3 x 3 in.) NaI Detector
More Info

microR / microSv Meters

Ludlum Model 12S

Ludlum Model 12S

  • Features
    • 4-Range Analog Meter
    • Internal 2.5 x 2.5 cm (1 x 1 in.) NaI Scintillator Detector
    • Sensitivity (137Cs): 175 cpm per µR/hr
    • Range: 0 to 3000 µR/hr
  • Replacement Parts
    • NaI(Tl) Scintillator glued to PMT, Non-Based with Voltage Divider (P/N 2004-033)
    • NaI(Tl) Scintillator with PMT, Non-Based with Voltage Divider (P/N 40-5154)
    • Detector Assembly (Includes 2004-033) (P/N 47-1574)
More Info
Ludlum Model 12SA

Ludlum Model 12SA

  • Features
    • 4-Range Analog Meter
    • Internal 2.5 x 2.5 cm (1 x 1 in.) NaI Scintillator Detector
    • Sensitivity (137Cs): 175 cpm per µR/hr
    • Range: 0 to 3000 µR/hr
    • Alarm
  • Replacement Parts
    • NaI(Tl) Scintillator glued to PMT, Non-Based with Voltage Divider (P/N 2004-033)
    • NaI(Tl) Scintillator with PMT, Non-Based with Voltage Divider (P/N 40-5154)
    • Detector Assembly (Includes 2004-033) (P/N 47-1574)
More Info
Ludlum Model 19

Ludlum Model 19

  • Features
    • Linear Analog Meter
    • 5 Selectable Ranges
    • Internal 2.5 x 2.5 cm (1 x 1 in.) NaI Scintillator Detector
    • Sensitivity (137Cs): 175 cpm per µR/hr
    • Range: 0 to 5000 µR/hr
  • Replacement Parts
    • NaI(Tl) Scintillator glued to PMT, Non-Based with Voltage Divider (P/N 2004-033)
    • NaI(Tl) Scintillator with PMT, Non-Based with Voltage Divider (P/N 40-5154)
    • Detector Assembly (Includes 2004-033) (P/N 47-1574)
More Info
Ludlum Model 192

Ludlum Model 192

  • Features
    • 4-Range Analog Meter
    • Internal 5.1 x 2.5 cm (2 x 1 in.) NaI Scintillator Detector
    • Sensitivity (137Cs): 650 cpm per µR/hr
    • Range: 0 to 50 µSv/h (0 to 5000 µR/hr)
    • Dual Action Alarm
  • Replacement Parts
    • Detector Assembly (P/N 47-2951)
More Info
Ludlum Model 193

Ludlum Model 193

  • Features
    • 4-Range Analog Meter
    • Supports Gamma Scintillator Detectors
    • Dual Action Alarm
    • Four Linear Ranges
More Info
Ludlum Model 19A

Ludlum Model 19A

  • Features
    • Logarithmic Analog Meter
    • Internal 2.5 x 2.5 cm (1 x 1 in.) NaI Scintillator Detector
    • Sensitivity (137Cs): 17,500 cpm per µSv/h (175 cpm per µR/hr)
    • Range: 0 to 5 µSv/h (0 to 500 µR/hr)
    • Alarm
  • Replacement Parts
    • NaI(Tl) Scintillator glued to PMT, Non-Based with Voltage Divider (P/N 2004-033)
    • NaI(Tl) Scintillator with PMT, Non-Based with Voltage Divider (P/N 40-5154)
    • Detector Assembly (Includes 2004-033) (P/N 47-1574)
More Info
Ludlum Model 2401-S

Ludlum Model 2401-S

  • Features
    • Low-Level Gamma & X-Ray Survey
    • 3-Range Analog Meter
    • Internal 18 mm dia. CsI Scintillator Detector
    • Sensitivity (137Cs): 100 cpm per µR/hr
    • Range: 0 to 50 µSv/h (0 to 5000 µR/hr)
    • Alarm
  • Replacement Parts
    • CsI Scintillator (P/N 01-5661)
    • Photomultiplier Tube (P/N 01-5936)
    • Detector Assembly (P/N 4397-137)
More Info
Ludlum Model 3019

Ludlum Model 3019

  • Features
    • Digital Meter
    • Internal 2.5 x 1.9 cm (1 x 0.75 in.) CsI Scintillator Detector
    • Sensitivity (137Cs): 17,500 cpm per µSv/h (175 cpm per µR/hr)
    • Range: Background to 500 µSv/h (50 mR/hr)
    • Alarms
More Info
Ludlum Model 3192

Ludlum Model 3192

  • Features
    • Digital Meter
    • Internal 5.1 x 2.5 cm (2 x 1 in.) NaI Scintillator Detector
    • Sensitivity (137Cs): 65,000 cpm per μSv/h (650 cpm per μR/hr)
    • Range: Background to 50 μSv/h (0 to 5,000 μR/hr)
    • Alarms
More Info

Neutron Meters

Ludlum Model 12-4

Ludlum Model 12-4

  • Features
    • 4-Range Analog Meter
    • Model 42-31H 3He Proportional Detector
    • Moderator: 22.9 cm (9.0 in.) dia.
    • Sensitivity (241AmBe): 10,000 cpm per mSv/h (100 cpm per mrem/hr)
    • Range: 0 to 100 mSv/h (0 to 10,000 mrem/hr)
  • Replacement Parts
    • Detector Assembly (P/N 47-1346)
More Info
Ludlum Model 12-4-7

Ludlum Model 12-4-7

  • Features
    • 4-Range Analog Meter
    • Moderator: 19.5 cm (7.7 in.) dia.
    • Sensitivity (241AmBe): 10 cpm per µSv/h (100 cpm per mrem/hr)
    • Range: 0 to 100 mSv/h (0 to 10,000 mrem/hr)
More Info
Ludlum Model 15

Ludlum Model 15

  • Features
    • Neutron and Alpha-Beta-Gamma Detection
    • 4-Range Analog Meter
    • Model 42-14H 3He Proportional Detector
      • Sensitivity (241AmBe): 55 cpm per mrem/hr
    • Model 44-7 End-Window GM Detector
      • Sensitivity (137Cs): 2100 cpm per mR/hr
    • Range: 0 to 500,000 cpm
More Info
Ludlum Model 2241-4

Ludlum Model 2241-4

  • Features
    • Digital Scaler-Ratemeter
    • Model 42-31H 3He Proportional Detector
    • Moderator: 22.9 cm (9.0 in.) dia.
    • Sensitivity (241AmBe): 30 cpm per mrem/hr
    • Range: 0 to 100 mSv/h (0 to 10,000 mrem/hr)
  • Replacement Parts
    • RS-232 Cable (9-pin) (P/N 8303-458)
    • RS-232 Cable (25-pin) (P/N 8303-459)
    • Meter Bezel (P/N 4408-051)
    • Digital Display (P/N 5408-259)
    • Rolled Handle (P/N 4408-075)
    • Flat Handle (P/N 4408-090)
More Info
Ludlum Model 2363 with Model 42-41L

Ludlum Model 2363 with Model 42-41L

  • Features
    • Neutron and Gamma Detection
    • Analog + Digital Scaler-Ratemeter
    • External Model 42-41L PRESCILA Detector
      • Neutron Sensitivity: 350 cpm per mrem/hr
      • Range: 0.1 mrem/hr to 1 rem/hr
    • Internal GM Detector
      • Gamma Sensitivity: 1000 cpm per mR/hr
      • Range: 1 µSv/h to 10 m Sv/h (0.1 mR/hr to 1 R/hr)
More Info
Ludlum Model 30-4

Ludlum Model 30-4

  • Features
    • Digital Meter
    • 3He Proportional Detector
    • Moderator: 22.9 cm (9.0 in.) dia.
    • Sensitivity (241AmBe): 10 cpm per µSv/h (100 cpm per mrem/hr)
    • Range: 0 to 99.9 mSv/h (0 to 9.99 rem/hr)
More Info
Ludlum Model 30-7 Series

Ludlum Model 30-7 Series

  • Features
    • Digital Meter
    • 3He Proportional Detector
    • Moderator: 19.5 cm (7.7 in.) dia.
    • Sensitivity (241AmBe): 4.5 cpm per µSv/h (45 cpm per mrem/hr) or 10 cpm per µSv/h (100 cpm per mrem/hr)
    • Range: 0 to 99.9 mSv/h (0 to 9.99 rem/hr)
More Info
Ludlum Model 3004 Series

Ludlum Model 3004 Series

  • Features
    • Digital Meter
    • 3He Proportional Detector
    • Moderator: 22.9 cm (9,0 in.) dia.
    • Sensitivity (241AmBe): 10 cpm per μSv/h (100 cpm per mrem/hr)
    • Range: 0 to 100 mSv/h (0 to 10,000 rem/hr)
    • Internal Detector Option for Exposure/Dose Measurements
  • Configurations
    • Model 3004i (P/N 48-4442)
    • Model 3004i/1 (P/N 48-4442-1)
    • Model 3004i/4 (P/N 48-4442-4)
    • Model 3004i/6 (P/N 48-4442-6)
More Info
Ludlum Model 3007 Series

Ludlum Model 3007 Series

  • Features
    • Digital Meter
    • 3He Proportional Detector
    • Moderator: 19.5 cm (7.7 in.) dia.
    • Sensitivity (241AmBe): 4.5 cpm per µSv/h (45 cpm per mrem/hr) or 10 cpm per µSv/h (100 cpm per mrem/hr)
    • Range: 0 to 100 mSv/h (0 to 10,000 rem/hr)
    • Internal Detector Option for Exposure/Dose Measurements
  • Configurations
    • Model 3007B (P/N 48-4294B)
    • Model 3007-1 (P/N 48-4294-1)
    • Model 3007i (P/N 48-4443)
    • Model 3007Bi (P/N 48-4443B)
    • Model 3007i/1 (P/N 48-4443-1)
    • Model 3007Bi/1 (P/N 48-4443B-1)
    • Model 3007i/4 (P/N 48-4443-4)
    • Model 3007Bi/4 (P/N 48-4443B-4)
    • Model 3007i/6 (P/N 48-4443-6)
    • Model 3007Bi/6 (P/N 48-4443B-6)
More Info
Ludlum Model 3014 with Model 42-41L

Ludlum Model 3014 with Model 42-41L

  • Features
    • Neutron and Gamma Detection
    • Digital Meter
    • External Model 42-41L PRESCILA Detector
      • Neutron Sensitivity: 35 cpm per µSv/h (350 cpm per mrem/h)
      • Range: 1 µSv/h to 10 mSv/h (0.1 mrem/hr to 1 rem/hr)
    • Internal GM Detector
      • Gamma Sensitivity: 100 cpm per µSv/h (1000 cpm per mR/hr)
      • Range: Background to 50 mSv/h (5 R/hr)
More Info
Ludlum Model 375-31H

Ludlum Model 375-31H

  • Detector Type
    • External 3He Tube with 22.9 cm (9 in.) diameter moderator
  • Linear Range
    • 0 to 100 mSv/h (0 to 10 rem/hr)
  • Features
    • Digital Area Monitor
    • 3He Proportional Detector
    • Moderator: 22.9 cm (9.0 in.) dia.
    • Sensitivity: 10,000 cpm per mSv/h (100 cpm per mrem/hr)
    • Range: 0 to 100 mSv/h (0 to 10 rem/hr)
More Info

Pocket-Size Meters

Ludlum Model 2401-EC

Ludlum Model 2401-EC

  • Features
    • Gamma Survey
    • 3-Range Analog Meter
    • Internal Energy-Compensated GM Detector
    • Sensitivity (137Cs): 1050 cpm per mR/hr
    • Range:
      • 0 to 200 mR/hr
      • 0 to 210,000 cpm
  • Replacement Parts
    • GM Tube (P/N 01-5295)
More Info
Ludlum Model 2401-EC2

Ludlum Model 2401-EC2

  • Features
    • Gamma Survey
    • 3-Range Analog Meter
    • Internal Energy-Compensated GM Detector
    • Sensitivity (137Cs): 100 cpm per mR/hr
    • Range: 0 to 2 R/hr
  • Replacement Parts
    • GM Tube (P/N 01-5306)
More Info
Ludlum Model 2401-EC2A

Ludlum Model 2401-EC2A

  • Features
    • Gamma Survey
    • 3-Range Analog Meter
    • Internal Energy-Compensated GM Detector
    • Sensitivity (137Cs): 120 cpm per mR/hr
    • Range: 0 to 200 µSv/h (0 to 2 R/hr)
    • Alarm
  • Replacement Parts
    • GM Tube (P/N 01-5306)
More Info
Ludlum Model 2401-ECA

Ludlum Model 2401-ECA

  • Features
    • Gamma Survey
    • 3-Range Analog Meter
    • Internal Energy-Compensated GM Detector
    • Sensitivity (137Cs): 1050 cpm per mR/hr
    • Range:
      • 0 to 200 mR/hr
      • 0 to 210,000 cpm
    • Alarm
More Info
Ludlum Model 2401-EW

Ludlum Model 2401-EW

  • Features
    • Alpha-Beta-Gamma Survey
    • 3-Range Analog Meter
    • Internal End-Window GM Detector
    • Sensitivity (137Cs): 1050 cpm per mR/hr
    • Range:
      • 0 to 200 mR/hr
      • 0 to 210,000 cpm
  • Replacement Parts
    • GM Tube (P/N 01-5032)
More Info
Ludlum Model 2401-EWA

Ludlum Model 2401-EWA

  • Features
    • Alpha-Beta-Gamma Survey
    • 3-Range Analog Meter
    • Internal End-Window GM Detector
    • Sensitivity (137Cs): 1050 cpm per mR/hr
    • Range:
      • 0 to 200 mR/hr
      • 0 to 210,000 cpm
    • Alarm
More Info
Ludlum Model 2401-P

Ludlum Model 2401-P

  • Features
    • Alpha-Beta-Gamma Survey
    • 3-Range Analog Meter
    • Internal Pancake GM Detector
    • Sensitivity (137Cs): 3300 cpm per mR/hr
    • Range: Meter Face Dependent
  • Replacement Parts
    • GM Tube (P/N 01-5008)
More Info
Ludlum Model 2401-P DOSE

Ludlum Model 2401-P DOSE

  • Features
    • Alpha-Beta-Gamma Survey
    • 3-Range Analog Meter
    • Internal Pancake GM Detector
    • Sensitivity (137Cs): 3300 cpm per mR/hr
    • Range: 0 to 15 mSv/h
    • Dose Equivalent Filter
More Info
Ludlum Model 2401-S

Ludlum Model 2401-S

  • Features
    • Low-Level Gamma & X-Ray Survey
    • 3-Range Analog Meter
    • Internal 18 mm dia. CsI Scintillator Detector
    • Sensitivity (137Cs): 100 cpm per µR/hr
    • Range: 0 to 50 µSv/h (0 to 5000 µR/hr)
    • Alarm
  • Replacement Parts
    • CsI Scintillator (P/N 01-5661)
    • Photomultiplier Tube (P/N 01-5936)
    • Detector Assembly (P/N 4397-137)
More Info
Ludlum Model 2402

Ludlum Model 2402

  • Features
    • 3-Range Analog Meter
    • Supports GM & Scintillation Detectors
    • Alarm
More Info
Ludlum Model 2403

Ludlum Model 2403

  • Features
    • 4-Range Analog Meter
    • Supports GM & Scintillator Detectors
More Info

Scaler-Ratemeters

Ludlum Model 2241

Ludlum Model 2241

  • Features
    • Auto-Ranging Digital Meter
    • Supports GM, Proportional & Scintillation Detectors
    • RS-232 Port
  • Replacement Parts
    • RS-232 Cable (9-pin) (P/N 8303-458)
    • RS-232 Cable (25-pin) (P/N 8303-459)
    • Meter Bezel (P/N 4408-051)
    • Digital Display (P/N 5408-259)
    • Rolled Handle (P/N 4408-075)
    • Flat Handle (P/N 4408-090)
More Info
Ludlum Model 2241-2

Ludlum Model 2241-2

  • Features
    • Auto-Ranging Digital Meter
    • Supports GM, Proportional & Scintillator Detectors
    • Can Store Up To 2 Detector Set-Ups
    • RS-232 Port
  • Replacement Parts
    • RS-232 Cable (9-pin) (P/N 8303-458)
    • RS-232 Cable (25-pin) (P/N 8303-459)
    • Meter Bezel (P/N 4408-051)
    • Digital Display (P/N 5408-259)
    • Rolled Handle (P/N 4408-075)
    • Flat Handle (P/N 4408-090)
More Info
Ludlum Model 2241-2i

Ludlum Model 2241-2i

  • Features
    • Auto-Ranging Digital Meter
    • Supports GM, Proportional & Scintillator Detectors
    • Internal Energy-Compensated GM Detector
      • Range: Up To 10 R/hr
    • Can Store Up To 2 Detector Set-Ups
    • RS-232 Port
  • Replacement Parts
    • RS-232 Cable (9-pin) (P/N 8303-458)
    • RS-232 Cable (25-pin) (P/N 8303-459)
    • Meter Bezel (P/N 4408-051)
    • Digital Display (P/N 5408-259)
    • Rolled Handle (P/N 4408-075)
    • Flat Handle (P/N 4408-090)
    • GM Tube (P/N 01-5306)
More Info
Ludlum Model 2241-2i/2

Ludlum Model 2241-2i/2

  • Features
    • Auto-Ranging Digital Meter
    • Supports GM, Proportional & Scintillator Detectors
    • Internal Energy-Compensated GM Detector
      • Range: Up To 1 R/hr
    • Can Store Up To 2 Detector Set-Ups
    • RS-232 Port
  • Replacement Parts
    • RS-232 Cable (9-pin) (P/N 8303-458)
    • RS-232 Cable (25-pin) (P/N 8303-459)
    • Meter Bezel (P/N 4408-051)
    • Digital Display (P/N 5408-259)
    • Rolled Handle (P/N 4408-075)
    • Flat Handle (P/N 4408-090)
More Info
Ludlum Model 2241-3

Ludlum Model 2241-3

  • Features
    • Auto-Ranging Digital Meter
    • Supports GM, Proportional & Scintillation Detectors
    • Can Store Up To 4 Detector Set-Ups
    • RS-232 Port
  • Replacement Parts
    • RS-232 Cable (9-pin) (P/N 8303-458)
    • RS-232 Cable (25-pin) (P/N 8303-459)
    • Meter Bezel (P/N 4408-051)
    • Digital Display (P/N 5408-259)
    • Rolled Handle (P/N 4408-075)
    • Flat Handle (P/N 4408-090)
More Info
Ludlum Model 2241-3i

Ludlum Model 2241-3i

  • Features
    • Auto-Ranging Digital Meter
    • Supports GM, Proportional & Scintillator Detectors
    • Internal Energy-Compensated GM Detector
      • Range: Up To 10 R/hr
    • Can Store Up To 4 Detector Set-Ups
    • RS-232 Port
  • Replacement Parts
    • RS-232 Cable (9-pin) (P/N 8303-458)
    • RS-232 Cable (25-pin) (P/N 8303-459)
    • Meter Bezel (P/N 4408-051)
    • Digital Display (P/N 5408-259)
    • Rolled Handle (P/N 4408-075)
    • Flat Handle (P/N 4408-090)
More Info
Ludlum Model 2242

Ludlum Model 2242

  • Features
    • Gamma Survey Digital Meter
    • 2 Internal Energy-Compensated GM Detectors
    • Range: 0.1 mR/hr to 999.9 R/hr
More Info

Specialized Meters

Ludlum Model 194

Ludlum Model 194

  • Features
    • Energy-Flat Dose Equivalent Rate Meter
    • Digital Display
    • Internal Plastic Scintillator Detector
    • Low Range: Background to 19.99 µSv/h (1999 µrem/hr)
    • High Range: 1 to 1999 µSv/h (0.1 to 199.9 mrem/hr)
    • Extended Version with Low-Energy Window
  • Configurations
    • Model 194/S (P/N 48-4364-1)
    • Model 194/E (P/N 48-4388)
    • Model 194/SE (P/N 48-4388-1)
    • Headphone Modification (P/N 4475-118)
    • Shoulder Strap (P/N 4475-120)
More Info
Ludlum Model 195 with Model 43-132

Ludlum Model 195 with Model 43-132

  • Features
    • Alpha Survey
    • Model 195 Digital Meter
    • External Model 43-132 Alpha Ion Chamber Detector
More Info
Ludlum Model 3-97

Ludlum Model 3-97

  • Features
    • Gamma Survey
    • 4-Range Analog Meter
    • Internal NaI(Tl) Scintillator Detector
      •  Sensitivity (137Cs): 175 cpm per µR/hr
    • External Model 44-38 GM Detector
      • Sensitivity (137Cs): 1200 cpm per mR/hr
    • Range: 0 µR/hr to 200 mR/hr
  • Replacement Parts
    • NaI(Tl) Scintillator glued to PMT, Non-Based with Voltage Divider (P/N 2004-033)
    • NaI(Tl) Scintillator with PMT, Non-Based with Voltage Divider (P/N 40-5154)
    • Detector Assembly (Includes 2004-033) (P/N 47-1574)
More Info
Ludlum Model 3-98

Ludlum Model 3-98

  • Features
    • 125I & Alpha-Beta-Gamma Survey
    • 4-Range Analog Meter
    • Internal Pancake GM Detector
      • Sensitivity (137Cs): 3300 cpm per mR/hr
    • External Model 44-3 NaI(Tl) Scintillator Detector
      • Sensitivity (125I): 675 cpm per µR/hr
    • Range: 0 to 500 kcpm
More Info

Stretch Scopes

Ludlum Model 3078 Series

Ludlum Model 3078 Series

  • Features
    • Digital Meter
    • Extends to 4.7 m (15.3 ft.)
    • Two External Energy-Compensated GM Detectors
    • Version with Internal Energy-Compensated GM Detector
    • Range: 1 µSv/h to 10 Sv/h (0.1 mR/hr to 1000 R/hr)
  • Configurations
    • Model 3078i (P/N 48-4337)
    • Model 3078i/1 (P/N 48-4337-1)
More Info
Ludlum Model 78

Ludlum Model 78

  • Features
    • Analog + Digital Meter
    • Extends to 3.6 m (12 ft.)
    • 2 Energy-Compensated GM Detectors
    • Range: 0.1 mR/hr to 1000 R/hr
  • Replacement Parts
    • Meter Movement (P/N 15-8066)
    • Telescope Assembly (P/N 4272-304)
    • GM Detector Assembly (P/N 4272-284)
More Info
Ludlum Model 78-1

Ludlum Model 78-1

  • Features
    • Analog + Digital Meter
    • Extends to 3.6 m (12 ft.)
    • 2 Energy-Compensated GM Detectors
    • Range: 0.1 µSv/hr to 9999 mSv/hr
More Info
Ludlum Model 78-6

Ludlum Model 78-6

  • Features
    • Analog + Digital Meter
    • Extends to 3.6 m (12 ft.)
    • NaI(Tl) Scintillator Detector
    • Range: 0.01 to 50 µSv/h (1 to 5000 µR/hr)
More Info
Ludlum Model 78-9

Ludlum Model 78-9

  • Features
    • Digital Meter
    • Extends to 3.6 m (12 ft.)
    • Pancake GM Detector
More Info
Ludlum Model 79

Ludlum Model 79

  • Features
    • Digital Meter
    • Extends to 4.5 m (14.75 ft.)
    • Energy-Compensated GM Detector
    • Range: 10 µSv/h to 10 Sv/h (1 mR/hr to 1000 R/hr)
More Info
Ludlum Model 79/1

Ludlum Model 79/1

  • Features
    • Digital Meter
    • Extends to 4.5 m (14.75 ft.)
    • CsI(Tl) Scintillator Detector
    • Range: 0.01 µSv/h to 500 µSv/h (1 µR/hr to 50 mR/hr)
More Info
Ludlum Model 79/2

Ludlum Model 79/2

  • Features
    • Digital Meter
    • Extends to 4.5 m (14.75 ft.)
    • Internal Energy-Compensated GM
    • Range: 0.001 mSv/h to 0.04 Sv/h (0.1 mR/hr to 4 R/hr)
More Info
Ludlum Model 9-7S

Ludlum Model 9-7S

  • Features
    • Digital Meter
    • 1.1 to 3.8 m (3.7 to 12.6 ft.) Telescoping Stainless Steel Pole
    • Display Range: 0.001 R/hr to 19.99 kR/hr
    • Four Available Detectors
More Info