Tenmars TM-91 Radiation Monitor


The TM-91 Radiation Monitor is a survey meter measuring the beta, gamma and x-ray radiation. It is useful in monitoring the environment, home safety, nuclear, medical, mining and metal industries. It is also ideal for border control, customs and cargo inspections.


  • Built-in GM tube.
  • The values in µ Sv/h, µ Rem/h or mRemh are displayed on LCD screen
  • Quick response to the radiation strength of Beta and Gamma ray.
  • Auto ranging.
  • Alarm settings.
  • Automatic detection, easy setting.
  • Low battery indication.
  • Bright LCD display for night or day operation.
  • A beeper chirps with each radiation count.
  • Audio alarm set function.


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SKU: TENMARS TM-91 Categories: , Tags: ,

Tenmars TM-91 Specifications

Display 3-1/2 digit LCD
Measuring Range 0.05 µSv/h – 19.9 µSv/h
5 µRem/h – 199.9 µRem/h
Resolution 0.01 µSv/h
1 µRem/h
Test Radiation ẞ – radiation and y – radiation
Energy Dependency 0.1 to 1.25 Mev
Accuracy ±15% of reading
Operating Temperature/Humidity 0°C to 50°C; below 80% R.H.
Storage Temperature/Humidity -20°C to 60°C; below 75% R.H.
Power Supply 9 volt Alkaline battery
Battery Life approx. 50 hours
Dimensions 143mm (L) x 74mm (W) x 34mm (D)
Weight 220g approx.
Ordering Information
Model Name Description
Tenmars TM-91 Radiation Monitor
Included accessories: User’s manual, and battery.


Geiger Counter to be accurate within reasonable standards of acceptance, and includes instructions that, if followed ,will yield accurate measurements. Manufacturer assumes no liability for damages, consequential or otheruyise that may arise from the use of the Geiger counter by any person, under any circumstances. The Geiger counter is sensitive to gamma, beta and X-ray radiation, but not necessarily to etremely low energy forms, or alpha, neutron or microwave radiation. Do not open Geiger counter or otherwise tamper with or attempt to service it

Weight .2 kg


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