Wide Range External Gamma Detector

Smart wide-range gamma detector for WebiSmarts, 0.5 µSv/h – 10 Sv/h

Smart external detector for WebiSmarts that stores its calibration and configuration parameters in internal memory, so that detectors can easily be swapped. It contains two GM tubes and covers 0.5 µSv/h – 10 Sv/h.

Detector
GM tubes ZP-1301 and ZP-1201 (or equivalent)1
Measurement range
0.5 µSv/h – 10 Sv/h (50 µR/h – 1,000 R/h)1
Energy range
Gamma 50 keV – 2 MeV1
Datasheet

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

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

Overview

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.

Detector

DetectorGM tubes ZP-1301 and ZP-1201 (or equivalent)1

Performance

Accuracy±10% of reading within the measuring range1

Measuring range

Measurement range0.5 µSv/h – 10 Sv/h (50 µR/h – 1,000 R/h)1
Sensitivity17 cps per mR/h (low range); 0.3 cps per mR/h (high range)1
Energy rangeGamma 50 keV – 2 MeV1

Connectivity & interface

CommunicationRS-485; cable up to 100 m1

Mechanical

Dimensions254 × ø33 mm1
Weight280 g (0.62 lb)1

Environment & ratings

Operating temperature−10 to +50 °C1

Ordering & accessories

Ordering codeBAK-35931

General

FunctionsGamma2

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 Checked 2026-10-16
  2. 2
    Publisher: Rotem IndustriesProduct page Product page Checked 2026-10-16
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Ethernet area monitor with PoE for WebiSmarts, with or without an internal detector

Measurement range
Internal low-range detector: 0.1 µSv/h – 40 mSv/h (0.01 mR/h – 4 R/h); wide-range detector: 0.1 µSv/h – 10 Sv/h (0.01 mR/h – 1,000 R/h)
Detector
One internal and three external detectors, recognised automatically (also available without an internal detector)
Weight
DPU-3: 1.7 kg
11 referenced values
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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
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Sensitive NaI(Tl) gamma probe, Rotem’s primary effluent detector in WebiSmarts

Detector
NaI(Tl), 5.1 × 5.1 cm (2 × 2 in); magnetically shielded 5.1 cm photomultiplier
Energy range
Gamma above 50 keV; recommended 30 keV – 3.0 MeV
Count-rate range
0–50,000 cps
8 referenced values
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Wall-mounted neutron detector (Ludlum 42-30H) for area monitoring in WebiSmarts

Detector
Proportional neutron detector Ludlum Model 42-30H; moderator: polyethylene sphere ø25.4 cm
Energy range
Thermal to approx. 12 MeV
Weight
8.8 kg (19.5 lb)
11 referenced values
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