TSG offers a variety of radiation measuring and monitoring
instruments produced by several quality manufacturers.
Shown here below are a few of the various models we offer, if you don't see what
you are looking for, call our sales department for more information. If your are
uncertain as to which model is best for your application, we will be glad to
assist you with your selection.











![]()
Geiger-Muller Survey Meters
NDS Products model ND-500A
Low energy 4-range radiographic survey meter. Gamma and X-Ray detection up
to 500 mR/h, energy compensated, uses 2 "D" cell batteries. Rugged
construction, waterproof. Audio option available.
Energy response: from 60keV to
1.5MeV
Ranges: 0-0.5 mR/h, 0-5 mR/h, 0-50 mR/h, 0-500 mR/h
NDS Products ND-2000
Gamma and X-Ray detection up to 1000 mR/h, energy compensated, uses 2 "D"
cell batteries. Rugged construction, waterproof.
Energy response: from 80 to
1500 keV
Ranges: 0-10 mR/h, 0-100 mR/h, 0-1000 mR/h
NDS Products ND-2000C
Gamma and X-Ray detection up to 1000 mR/h, energy compensated, uses 2 "D"
cell batteries. Rugged construction, waterproof, with built-in dosimeter
charger.
Energy response: from 80 to 1500 keV
Ranges: 0-10 mR/h, 0-100 mR/h, 0-1000 mR/h
NDS Products ND-2200
Low energy Gamma and X-Ray detection up to 1000 mR/h, energy compensated,
uses 2 "D" cell batteries. Rugged construction, waterproof, with slow-fast
response switch.
Energy response: from 50 to
1500 keV
Ranges: 0-10 mR/h, 0-100 mR/h, 0-1000 mR/h
NDS Products ND-2500 (4
Range Survey Meter)
Low energy Gamma and X-Ray detection up to 1000 mR/h, energy compensated,
uses 2 "D" cell batteries. Rugged construction, waterproof.
Energy response: from 50 to
2000 keV
Ranges: 0-1 mR/h, 0-10 mR/h, 0-100 mR/h, 0-1000 mR/h
Victoreen Model 190I (NDT
Digital Survey Meter)
Gamma and X-Ray detection up to 1000 mR/h. Analog/digital display,
rate/integrate modes, response switch, built-in audio with on/off, uses 1
to 4 9-volt batteries.
Ranges: 0.01 mR/h to 1000 mR/h
Bicron RO-20 (Replaces Bicron RO-50)
With five linear ranges of operation the portable air ionization instrument detects beta, gamma and x-radiation. The unique ionization chamber is vented to atmospheric pressure and is specifically designed to have a flat energy response into the x-ray region.
Ranges: 0-5, 0-50, 0-500 mR/hr; 0-5, 0-50 R/h
For Medical and Scientific Applications
Victoreen 451P
Beta, Gamma and X-Ray detection to 5 R/h, Pressurized ion chamber,
Analog/digital display, Dose and dose rate functions.
Energy response: Beta above 1 MeV, Gamma & x-ray above 25 keV
Ranges:0-500 uR/h, 0-5 mR/h, 0-50 mR/h, 0-500 mR/h, 0-5 R/h
ND-138 Ion Chamber Pocket
Dosimeter
Gamma and X-Ray detection of accumulated dose to 200mR. Fiber
electrometer mounted in hermetically sealed ion chamber. (requires charger sold
separately)
Energy response: Gamma & X-Ray from 16keV to 6MeV
Personnel and Area Monitors
ND-100 Dosimeter Charger
Durable, compact, battery powered unit is combatable with all fiber
ion chamber pocket dosimeters. Uses 2 "C" cell non-alkaline
batteries.
ND-15 Dual-Range Personal
Monitor
Rugged belt worn exposure warning monitor detects Gamma and X-Ray, emits
"chirp" warning which varies in frequency as radiation exposure
intensifies. Detector is a halogen quenched energy compensated GM tube. Low
range: 60 chirps per minute in a 1mR/hr field, high range: 60 chirps per min in
a 30mR/hr field.
Energy response: 60 to 1500 KeV
RA-500 Personal Monitoring
Rate Alarm
![]()
Rugged belt worn exposure warning monitor detects Gamma and X-Ray, emits
100DB loud solid tone warning in a 500mR/hr field.. Detector is a halogen
quenched energy compensated GM tube. Meets NRC 10-CFR-34.33 requirement
for personal monitoring.
Energy response: 60 to 1500 KeV
ND-4000B Area Radiation
Monitor
Economical area monitor detects Gamma and X-Ray, standard alarm trip point
at 2mR/hr (other trip points available), will activate any 120V AC (up to 5
amps) warning device such as warning lights, alarm, or door interlocks.
Energy response: 60 to 1500 KeV
Aloka PDM-117 Gamma and X-Ray accumulated dose detection up to 10mSv. Digital display electronic pocket dosimeter requires no charger separate reader or developing. Energy Response: Gamma & x-ray above 20 keV. Range: 1 to 9999 µSv
Aloka PDM-112 Pocket Dosimeter
Gamma and X-Ray accumulated dose indication up to 10mSv. Digital
display electronic pocket dosimeter requires no charger, separate
reader or developing. Energy response: Gamma & x-ray above
40 keV. Range: 1 to 9999 µSv
K8 Nuke Safeguard Miniature Alarming Ratemeter
The K8 is a small discrete alarming ratemeter capable of detecting even very small amounts of radiation and radioactive materials. The green LED indicates the presence of radiation. A red LED and audible alarm indicate high-level radiation. The red LED and audible alarm threshold is preset to 5 mrem/hr but can also be “custom set” per special request. Does not record or display cumulative dose.