Thermo MiniRad 1000 GM Survey Meters

The Mini1000 Series has the following features:

* A logarithmically scaled meter with an open scale at the lower end to show background radiation levels while displaying high levels withut switching
* An integral Detector assembly that allows convenient single-handed operation
* A speaker to give an audible estimate of radiation intensity
* An alarm which can be set to sound at any level on the scale
* Long battery life
* A lightweight shatter resistant plastic case
* Weatherproof cnstruction
* Comprehensive manual containing energy response curves and other useful information

The Mini-Rad is intended for use by research, hospital, and industrial organizations as an inexpensive, convenient, and reliable gamma doserate meter. The GM tube used in the 1000RA and 1000RMA Models is compensated to give a useful (+/-30%) response from 50 keV to 1.25 MeV. The energy cmpensation on the 1000 RLA Model is designed to give a wide energy range from 17 keV to 1.25 MeV +/-20%, which makes the instrument suitable for monitoring X-ray surces of 20kVP and above.

The monitor conforms to the requirements of the Internatinal Electrtechnical Commission publication 325.

Sensitivity data derived from tests carried out by the NRPB. Contamination response figures were obtained with the monitor standing on a large area source. The resulting source to Detector window distance is approximately 1 cm.

A leather finish carrying case is available as an optinal extra.

Specifications:
Range: Mini-Rad 1000RA: 0.1 uSvh^-1 to 1000 uSvh^-1 (0.01 mR/h to 100 mR/h);
       Mini-Rad 1000RMA: 10 uSvh^-1 to 10,000 uSvh^-1 (1.0 mR/h to 1 R/h);
       Mini-Rad 1000RLA: 0.01 - 200 uSvh^-1 < (1 uR/h - 20 mR/h)
Assembly Class: Class II (IEC395), intrinsic errr +/-20%
Detector: Energy compensated GM tube
Energy Range: 50 keV to 1.25 MeV +/- 20% (Models RA and RMA);
       17 keV to 1.25 MeV +/- 20% (Model RLA)
Meter Integration Time: 1 to 8 seconds, depending on dose rate
Coefficient of Variation: Type R: 20% at 1 uSvh^-1 (0.1 mR/h); Type RM: 20% at 50 uSvh^-1 (5 mR/h)
Overload Protection: Meter remains over maximum scale mark to at least 1.0 Svh^-1 (100 R/h)
Ambient Temperature: -10 to +45 degrees C
Relative Humidity: Up to 95%, non-condensing
Meter: Taut baud 500 uA scaled over 60 mm
Battery: IEC type 6LF22, 9V
Battery Life: 250 hours normal operation
Case Size: 160 mm Long x 80 mm wide x 55 mm deep (excluding handle)
Material: Polycarbonate plastic
Weight: 0.625 kg