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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: -10oC to +50oC (15oF - 122oF)
Storage: -20oC to +60oC (-5oF - 140oF)

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.



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