Handheld pancake Geiger-Mueller probes with a thin mica window, for sensitive alpha and beta detection in daily surface contamination surveys.
The HP-210/HP-360 Series is designed for daily contamination surveys on personnel, table tops, floors, equipment and other surfaces that may be exposed to radioactive material. The probes help prevent the spread of contamination in the laboratory and meet environmental health and safety requirements for beta-emitting surface contamination.
The series includes the HP-360 in an ABS plastic housing and the shielded HP-210T (tungsten) and HP-210AL (aluminium) versions.
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| Detector type | GM, noncompensated, pancake |
|---|---|
| Radiation type | Alpha, beta, gamma |
| For use with (application) | Alpha/beta/gamma surveys; frisking |
| Mica window thickness | 1.4 to 2.0 mg/cm² |
| Mica window size | 4.45 cm dia. (1.75 in) |
| Active area | 15.5 cm² (2.4 in²) |
| Beta efficiencies (HP-360) | ¹³⁷Cs 22 %, ⁶⁰Co 16 %, ⁹⁰Sr/⁹⁰Y 32 %, ⁹⁹Tc 15 %, ¹⁴C 6 % |
| Sensitivity (HP-360) | ~3600 cpm/mR/h (¹³⁷Cs) |
| Operating voltage | 900 ± 50 V |
| Plateau length / plateau slope | 100 V minimum / 0.1 % per V maximum |
| Dead time | 50 µs maximum |
| Connector | MHV |
| Size (HP-360) | 24.8 × 6.8 × 7 cm (9.75 × 2.68 × 2.75 in) |
| Weight (HP-360) | 0.23 kg (0.5 lb) |
Source: Thermo Fisher Scientific, product page HP360 (2026) and HP-360 product specifications (2007). Full specifications are available in the documents.
