PM-11 Detector

Sensitive NaI(Tl) gamma probe, Rotem’s primary effluent detector in WebiSmarts

Gamma scintillation probe with a hermetically sealed 2 × 2 inch NaI(Tl) crystal and photomultiplier. It is Rotem’s primary, highly sensitive effluent detector in WebiSmarts and is mounted in the exhaust stack of cyclotrons to provide online release data; it can also be connected to the coincidence box, DRM-3000, DPU-3, RAM DA 2000 and RAM R-200.

Detector
NaI(Tl), 5.1 × 5.1 cm (2 × 2 in); magnetically shielded 5.1 cm photomultiplier1
Energy range
Gamma above 50 keV; recommended 30 keV – 3.0 MeV1
Count-rate range
0–50,000 cps1
Datasheet

Specifications checked against the manufacturer’s documents on 2026-10-17

Manufacturer’s product page (opens in a new tab)

Overview

Key features

  • Factory-calibrated energy windows for PET isotopes (F-18, Ga-68, O-15, C-11, N-13) or I-131 or Tc-99m, Ga-67 and Tl-201
  • Magnetically shielded photomultiplier

Specifications

The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.

DetectorNaI(Tl), 5.1 × 5.1 cm (2 × 2 in); magnetically shielded 5.1 cm photomultiplier1
Energy rangeGamma above 50 keV; recommended 30 keV – 3.0 MeV1
Detection efficiency¹²⁵I 4%; ⁵⁷Co 20%; ¹³⁷Cs 9%; ⁶⁰Co 15%1
Count-rate range0–50,000 cps1
Compatible metersCoincidence box (WebiSmarts), DRM-3000, DPU-3, RAM DA 2000 and RAM R-200 (as RP-11)1
Dimensions340 mm long, ø70 mm1
Operating temperature−10 to +50 °C1
Weight1.75 kg1

The data comes from the manufacturer’s published documents. Manufacturers may change specifications; the current configuration and performance are confirmed in the quotation.

Documents

Sources

The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.

  1. 1
    Publisher: Rotem IndustriesDatasheet TDS, Technical Data; TDS p. 1; Specifications – Size; Specifications – Temperature Range … Checked 2026-10-16
Coincidence Exhaust Stack Monitoring
Rotem

Coincidence Exhaust Stack Monitoring

Two-detector coincidence system for very low emissions in the exhaust stack

Detector
PM-11M gamma detector (NaI(Tl), 2 × 2 in), beta detector (plastic scintillator for positron identification) and GM-42 high-range GM detector; plus a flow meter
2 referenced values
WebiSmarts System
Rotem

WebiSmarts System

Web-based area and stack monitoring system with DPU-3 monitors

Primary function
Web software that receives online data from DPU-3 area monitors and shows them on colour-coded maps
Functions
One year of history per point; isotope identification of effluent; over 20 maps; real-time background subtraction; dose and dose rate at the same time
System components
Web software, DPU-3 monitors (four detectors each) and a stack monitor; maps, points and history are stored on a server and accessed with a browser
4 referenced values
RAM DA3-2000 Meter
Rotem

RAM DA3-2000 Meter

Smart meter for a range of interchangeable external detectors, with internal GM detector

Detector
Internal detector (DA3-2000): two energy-compensated GM tubes, ZP1201 and ZP1313 (air kerma) or ZP1202 and ZP1314 (H*(10)); DA 2000 without internal detector
Measurement range
0.5 µSv/h – 1 Sv/h (50 µR/h – 100 R/h), internal detector
Weight
1.5 kg including batteries and internal detectors
14 referenced values
GM-42 Detector
Rotem

GM-42 Detector

Sensitive low-range GM gamma detector for clean rooms and radiopharmacies

Detector
GM tube ZP-1201 or equivalent
Measurement range
0.5 µSv/h – 10 mSv/h (50 µR/h – 1 R/h)
Energy range
50 keV – 1.3 MeV
9 referenced values
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