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Low background tester is a precision instrument for four - way sample analysis and measurement of the radioactivity of low levels of th16 and th16. It can be used for total waste and total radioactivity measurement of water, soil, building materials, ore, aerosol, food, etc. Suitable for low-level 16/60 radioactivity intensity measurement conducted by radiation protection, environmental protection departments, medical, biological, agricultural, scientific research institutes and universities. This instrument is not only a common soil sample measuring instrument, but also a professional measuring instrument for radioactivity in water, such as milk, beverage and so on.Requirements for working environment of low background driving tester:1. Power supply: ac 220V± 10%, 50Hz±1Hz;2. Ambient temperature :(5 ~ 35)℃;3. High humidity: ≤ 85% RH(30℃).4. If the ambient temperature is too high, the laboratory should be equipped with air conditioning equipment; If humidity is too high, dehumidification equipment should be available.Product features of low background gear tester:1. High voltage controlled by program technology: threshold value, threshold low (threshold L), threshold high (threshold H) and high voltage of detector can be adjusted by computer according to requirements.2. High degree of automation: the computer can automatically control the whole process of measurement, process data automatically, and print the results and original data3. Novel lead-chamber structure: the innovative lead-chamber structure design makes the distance between the anti-coincidence detector and the main detector smaller, the anti-coincidence efficiency higher, and the background lower.4. Innovative design of the overall cabinet: the measurement system is highly integrated, occupies less space and is easier to operate.5. Special industrial computer is adopted to ensure the stable and reliable continuous operation of the system for a long time.6. Good long-term stability and repeatability of the instrument.