Research Electronics 905c

The Research Electronics (RE) Timer Scaler 905c is a high-voltage counter which uses dekatrons (rotary nixie tubes) for its display, and is designed to be used in conjunction with a Geiger–Müller tube or spark generator.

Kindly donated by Austin Pass in Manchester.

Meter, Contamination, No. 1

Meter, Contamination, No. 1 (stock number 5CG0012) was the first large-scale British civil defence issue Geiger counter, featuring a 0 – 10 mR/hour range with external probe and headphones. This was powered by two 150 volt batteries, four 1.35 volt mercury cells, or mains. Many of these units remained in service until the 1980s.

Philips PW4014

Philips Nuclear Equipment offered the transistorized pocket radiation monitor PW-4014 in 1958. It was advertised for use in “Nuclear Physics and Atomic Energy”. It has low measuring range 0-3 mR/h for radium-gammas, can connect separate Geiger-Muller (GM) probes and earphone, low power consumption, printed wiring, and tropic and waterproof. It employs the Philips GM type 18503.

From the collection of Chris Storey.

Ekco N645A

The Type N645A Field Ratemeter from Ekco Electronics Ltd. (UK) is a portable battery-powered Geiger counter, which uses a photomultiplier (PM) tube and scintillator to detect incident radiation.

From the collection of Chris Storey.

Thermo Electron RMP

The RMP is a personal dosimeter for industrial use from Thermo Electron, who merged in 2006 to make Fisher Scientific.

Kindly donated by Mike Jefferson.