GMP-25™ Pancake Probe

The GMP-25 probe is intended for monitoring alpha, beta, gamma and X-ray radiation.

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The GMP-25 probe is intended for monitoring alpha, beta, gamma and X-ray radiation. The GMP-25 is used as an external detector with the RDS-31/ iTx/iTxSD multi-purpose Radiation Survey Meters especially for surface contamination monitoring and source localization applications.

The GMP-25 probe is equipped with a Binder connector and connected to the mating bulk connector interface at the bottom of RDS-31 family survey meters. The GMP25 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

  • remote pulse rate measurements

  •  for alpha /beta/gamma surface contamination 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

Radiological Characteristics

  • radiation detected: gamma-, beta- and alpha-rays

  • energy range: gamma > 6 keV, betaEmax > 100 keV, and alpha > 2 MeV

  • detector type: GM tube 7313

  • pulse rate range: 0 – 50 000 cps

  • mica window with active area: 15.5 cm2 (6.1 in2); window thickness: 1.5 – 2 mg/cm2

  • sensitivity: 2.8 cps (170cpm) for 90Sr/90Y uniform source of 0.37 Bq/cm2

Mechanical Characteristics

  • equipped with retractable cord, length 300 mm – 1200 mm (11.81 in – 47.24 in)

  • 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

  • Casing of durable ABS/polycarbonate, lenght 375 mm (14.8 in), width 70 mm (2.75 in) (max)

  • weight: 490 g (1.08 lb)

Item Number

5230-0010 Pancake Probe GMP-25

Includes: Fixed coil cable.