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PM-11 Detector

The PM-11 is a scintillation probe for detection of gamma radiation. The combination of the RAM DA 2000 monitor and the PM-11 probe, permits highly efficient surface contamination detection.

A low voltage interface connects the RAM DA 2000 monitor with the probe.The PM-11 contains a highly efficient, hermetically sealed, NaI(Tl) scintillator, 2" diameter and 2" thick, coupled to a 2" photomultiplier tube. This is encased in a rugged, splash proof housing for protection against shock, vibration and humidity. The probe also contains a high voltage power supply, single channel analyzer (SCA), pulse shaper, GM saturation indicator, detector identifier and malfunction detection circuitry. This configuration minimizes noise, improving sensitivity and stability.

Specifications

Radiation Detected:		Gamma above 50 keV
Scintillator:		NaI(Tl) 2" diameter, 2" thick. Window of 1 mm. (0.04") aluminum
Energy Calibration:		Optional factory calibrated single channel analyzer (SCA) within the energy range
Count Rate Range:		0 - 50,000cps
Output Signals:		TTL pulses. Detector status: ID, OK, malfunction, overflow
Temperature Range:		Operation: -10^oC to +50^oC (15^oF - 122^oF) Storage: -20^oC to +60^oC (-5^oF - 140^oF)
Humidity Range:		40% to 95% RH (non condensing)
Dimensions:		340mm (13.4") length, 70mm (2.75") width
Weight:		1.75kg (3.9lbs)
Casing:		Aluminum, splash proof

Surface Sensitivity (in contact)

Isotope	Sensitivity cpm/Bq/cm²	MDL Bq/cm²
⁵¹Cr	27	140
¹²⁵I	25	150
¹³¹I	320	12
^99mTc	315	12
³²P	17	220

* Minimum detectable level calculations are based on background reading of 3600 cpm The confidence level is 99%

Ordering Information

PM-11- 2" x 2 Scintillator (Open Window) BAK-1500

Note: Specifications subject to change without notice.