Type YD-NDM portable neutron flux rate / dose equivalent instrument

      The YD-NDM portable neutron dose equivalent instrument is used in nuclear power plants, nuclear power stations, reactors, accelerators and operating neutron sources and other instruments to measure the dose equivalent rate of neutron dose. The instrument uses high performance integrated microcontroller as the core digital processing chip. It is digital, intelligent, liquid crystal display instrument, with Chinese menu operation interface and automatic or manual shift function. It is easy to operate and easy to use. The communication interface with the computer remotely connects the measurement results to the display and storage on the ordinary PC machine, which is convenient for calibration and long time measurement of the strong radiation area, and reduces the operator's dose. The panel adopts mask touch keyboard, and the communication interface adopts imported connector. The detector uses the helium - 3 proportional metal counting tube as the detecting element. The neutrons are made of polyethylene material. The neutron absorber is made of boron containing plastic, and the shell is nickel - plated aluminum alloy.
The product is designed according to the requirements of the relevant national and military standards, and is in line with the requirements of ICRI, and is suitable for working under harsh conditions.

Main technical parameters

Neutron sensitivity: 12cps/ (10 Sv h-1)
Measurement range: 0.1 Sv. H - 1 to 100m Sv. H - 1
Measurement uncertainty: less than 10%
Energy response: thermal neutron to 15MeV
Gamma ray sensitivity: 137Cs gamma source gives a dose of 10mSv/h.
Instrument response is less than 0.1mSv/h (according to international GB14318 - 93).

Neutron detector element: helium 3 proportional counter

Display: 2 row 16x16 dot matrix LCD, with backlight.
Alarm setting: the alarm domain can be set by the panel
Communication letter connection: through RS - 232 port communication and computer remote connection (30 meters cable line)
Use environment: 10 C at +50 C, relative humidity less than 90% (30 C)
Weight: 11Kg
Size: 216mmx320mm
Power supply: 6 section 5 rechargeable battery or 6 ordinary 5 batteries.
Continuous use time: normal use of backlight.
Use ordinary 5 battery for more than 20 hours, use rechargeable battery.
(1800AH) more than 36 hours.
Detector power supply: internal supply of high voltage +1200V