Fd808 is an intelligent portable gamma spectrometer and dose rate measurement meter, which completely conforms to gb energy response. You can read nuclear radiation strength or exposure rate directly, also quantitatively calculate contents of radionuclide like uranium, thorium and kalium through spectrogram. It has good stability, simple operation, small volume, light weight etc. Application: Find underground water resource, mineral prospecting, environmental monitoring, geological survey, nuclear laboratory and so on. Function: gamma radiation total amount measurement Technical parameters: 1. gamma ray energy is less than 4mev 2. Sensitive thresholds: 350cps/8/h 3. Detector: 30mm 30mm crystal, resolution superior than 8% 4. Range: 0~9999 8sv/h 0~9999p 5. Stability: measuring error 7% (working 8 hours) 6. Accuracy: utmost deviation between measured absorbed dose rate and the value calculated is no more than 10% 7. Working condition: -10~+50, relative humidity is less than95% 8. Size: 360 mm*90 mm*220 mm 9. Weight: 2.0kg Features: 1. 16 bites adc up to1msps, to achieve mca design technology 2. Timing x-gamma spectra measurement to recognize nuclide and quantitative calculation of radionuclide content, as supplying dose rate 4. Timing clock, can store 2 million spectra data 5. Custom measuring time: automatic get dose result after measurement 6. Multilayer menu display, auto survey and manual survey mode to choose 7. Chargeable lithium battery to supply; indicates when voltage is low, low power consumption, fast and convenient 8. Power consumption: less than 160mw.