Intelligent scintillation probe for H*(10) ambient equivalent dose rate over a dynamic range of 9 decades, designed to detect small increases in artificial radioactivity.
The FHZ 691-10 is an intelligent scintillation probe for H*(10) ambient equivalent dose rate measurement, designed to detect small increases in artificial radioactivity in environmental monitoring networks. Used with the FHT 6020P display unit, the probe has PTB type approval for calibration.
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| Detector type | Scintillation: NaI(Tl) low dose detector, GM high dose detector |
|---|---|
| Measurement range H*(10) | Low dose detector NaI(Tl): 0.01 μSv/h to 0.5 mSv/h; high dose detector (GM): 0.5 mSv/h to 10 Sv/h |
| Energy range H*(10) | 60 keV to 3 MeV |
| Sensitivity | Low dose detector: 160 cps/(μSv/h); high dose detector: 17 cps/(mSv/h) |
| Measuring accuracy | 3 % at 100 nSv/h in 1 min |
| Angular range | −45° to +45° |
| Permissible detector dose | 10 Sv |
| Interface | RS-485 |
| Protection class | IP67 in accordance with DIN 40050/EN 60529 |
| Operating temperature | −30 °C to +55 °C |
| Storage temperature | −40 °C to +70 °C |
| Dimensions | Diameter 65 mm, length 257 mm (without plug-in connection) |
| Weight | 520 g |
Source: Thermo Fisher Scientific, FHZ 691-10 product page (thermofisher.com). Full specifications are available in the documents.
