Supply of Seven 1000cc Ion Chambers for MoD CBRN Calibration

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Ministry of Defence, ISTAR, CBRN awarded a contract to PTW-UK Ltd for the manufacture and delivery of seven 1000cc spherical ion chambers to support tertiary level calibration of Radiation Detection and Monitoring Equipment (RDME) used within the Ministry of Defence.

The chambers are required to be compatible with the existing Unidos electrometer model type 10002 and must meet specifications including guarded air equivalent vented type, TNC male connector, sensitivity of at least 40 µC/Gy, collection efficiency of at least 99%, rigid stem mounting, measurement range from 0.1 mSv/h to 0.3 Sv/h, energy range of 40 keV to 1.3 MeV with ±4% accuracy, directional dependence within specified limits, short and long term stability, post irradiation leakage, leakage current ≤10 fA, maximum bias voltage of 500V, polarity effect ≤±1%, and a 10m extension cable with cable leakage ≤1 pC/(Gy.cm).

Each chamber must be accompanied by a check source and fixture for reproducible source positioning.

The contract value is AUD 43,770.