WM B Johnson Model GSM-5 Survey MeterWM B Johnson Model GSM 5 Survey Meter3 Range Beta Gamma Survey Meter 0 500, 0 5,000 & 0 50,000 CPM 0 . 2, 0 2 & 0 20 mR hr Dimensions: 8" long x 6"wide (with probe) x 6" tall 9 (with handle) Uses 3 1 Volt "D" size batteries Add a Counts. Pro (see Ebay item 401468071255) to this meter for $499 and digitally record and easily share all your measurements (a $100 discount off the regular price when you buy one of our meters): For a fraction of the price

) thick large surface area plastic scintillator detectors

Hand free communication

with beta shields

) diameter "phoswich": 0

The Ludlum Model 44-9 Alpha Beta Gamma Radiation GM pancake type detector is arguably the most popular radiation detector used throughout the world

and the background interval time is adjustable

Model: AFC-4 Serial# 9626

We have meters you can use do operate these detectors

Radiological Characteristics

ALPHA SCINTILLATION PROBE

Reading Method: Heating Optical-heating method

automatically indicates when battery is low