Vernier Software and Technology
Vernier Software & Technology

Digital Radiation Monitor

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Use the Digital Radiation Monitor to monitor alpha, beta, and gamma radiation for explorations in radiation statistics, measuring the rate of nuclear decay, and monitoring radon progeny.


The Digital Radiation Monitor consists of a Geiger-Mueller tube and a digital rate meter mounted in a small, rugged, plastic case. The unit is battery operated and can be used with or without an interface for measurement of alpha, beta, and gamma radiation. When used with an interface such as LabQuest, it can be used to study counting statistics, inverse-square relations, shielding effects, and other quantitative experiments. Without an interface, use the built-in counter and timer to measure count rates.

Sample Data



Sensor LND 712 (or equivalent) halogen-quenched GM tube with a mica end window, 1.5 to 2.0 mg/cm² thick. Rated at 1000 counts per minute using a Cesium-137 laboratory standard.
Power One 9-volt alkaline battery provides a battery life of 2000 hours at normal background radiation levels.
Accuracy ±10% typical, ±15% max. (mR/hr and µSv/hr modes)
Dimensions 150 x 80 x 30 mm (5.9″ x 3.2″ x 1.2″)
Weight 225 g (8 oz) with battery installed
Energy Sensitivity 1000 CPM/mR/hr referenced to Cs-137
Audio Output Chirps for each count (operational in audio mode only–can be muted)
Temperature Range –20°C to 50°C
Operating Range
  • mR/hr: 0.001 to 110
  • CPM: 0 to 350,000
  • Total: 1 to 9,999,000 counts
  • µSv/hr: 0.01 to 1100
  • CPS: 1 to 3,500
Download the user manual for full specifications

Experiments and Lab Ideas

Select a lab book to see a list of experiments and more information.

Lab Ideas and Innovative Uses

Do you have an innovative use for Vernier technology? What about a favorite lab or demo? We love to hear what creative uses people have for our products. Please email them to

Compatibility Requirements

The Digital Radiation Monitor may require a compatible interface and software. Choose a platform below to see compatible interface and software options.

What’s Included

  • Vernier Digital Radiation Monitor
  • Data-collection interface cable
  • User manual

Ordering Information

This product is discontinued. Please consider the Vernier Radiation Monitor


Related Products

Educational use only: Vernier products are designed for educational use. They are not appropriate for industrial, medical, or commercial applications. Product usage disclaimer »

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