OVERVIEW
The GMP-11-3 probe is intended for monitoring alpha, beta, gamma and X-ray radiation mainly in surface contamination monitoring applications. The GMP-11-3 is used as an external probe for the RDS-31S/R Multi-Purpose Survey Meter. The GMP-11-3 probe is connected to the Binder connector interface at the bottom of the RDS-31. Like other Mirion external probes, also the GMP-11-3 is a ” smart” probe, having an internal high voltage generator and non-volatile memory for calibration coefficients and probe identification data. Thus the probe can be connected “on-the-fly” without the need for switching off the meter, which automatically recognizes the probe type and sets the meter reading to defined measuring unit.
KEY FEATURES
•Complete range of smart probes to enhance the detection capabilities of the RDS-31S/R survey meters •Remote pulse rate measurements •Converts the meter into contamination monitor •Sensitive for low levels of alpha, beta and gamma radiation •For general contamination and frisking applications •Cord lengths up to 15 meters upon request
TECHNICAL SPECIFICATIONS: •Radiation detected: gamma-, beta- and alpha rays •Energy range: gamma > 6 keV, betaEmax > 100 keV, and alpha > 2 MeV •Detector type: halogen quenched GM tube (type ZP 1430 or equivalent) •Measurement range: 0 - 10 000 cps •End window active area: 6.1 cm2 ( 2.4 in2) window thickness 1.5-2 mg/ cm2 •Sensitivity: 1.0 cps for uniform 90Sr/90Y source of 0.37 Bq/cm2 •Binder connector, retractable cord, length 450 mm - 2000 mm (17.71 in - 78.7 in) •Max dead time: 230 μs •Self count rate: 25 cpm •Dimensions: length 140 mm (5.51 in), max diameter 44 mm (1.73 in) (two co-centric cylinders) •Weight: 340 g (0.75 lb)
ENVIRONMENTAL CHARACTERISTICS •Temperature range: operation: -25°C to +55°C (-13°F to +131°F), storage: -40°C to +70°C (-40°F to +158°F) •Humidity: 0 - 95% relative humidity, non-condensing
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