Hand-held Survey Meters

The internal 1" x 1" plastic scintillator has a close to tissue-equivalent response and has an oversized digital backlit display, dose or cpm operation modes and comes standard with timed-count capability, probe-saturation and error indicators.

This microprocessor-controlled instrument represents the gold standard of survey instruments. The GSM-500 is a digital ciruitry instrument with an analog display that automatically chooses the correct range with no user intervention required. Comes standard with probe saturation and other error indicators.

The GSM-506 is the ultimate survey meter for those looking for the simplicity of a contained detector system, with the luxury of an external probe capability for those special measurement applications. The external probe can fit any application as the GSM-506 is completely interchangeable with any Johnson Instrument Probe.

The ERK-525 is a complete, portable radiation monitoring system designed to measure a broad range of radioisotope contamination under field conditions. The system contains a state of the art, microprocessor based digital display meter that auto ranges and can detect most of the common alpha, beta & gamma radiation that is likely to be present in an emergency situation. The DSM-525 is a dual probe survey meter that measures contamination and dose levels from micro-R to 200 mR/hr levels of gamma isotopes (Based on 137-Cs calibration).

The DSM-525 is the most functional survey instrument on the market with its dual probe capability. This dual connection capability allows users the luxury of multiple level measurements with as many as four different probes calibrated to each measurement type. No more retracking to the instrument case to switch probes.

The DSM-503 Survey meter is the perfect mix of rugged and dependable for use in a variety of environments. With it's internal detector, this instrument is designed to fit the perfect application for general users of radiation measurement and monitoring. The internal energy compensated gm detector makes this instrument a perfect fit for general users of radiological instruments.