The BH1216 II single channel low background alpha beta measuring instrument has high sensitivity, low background, simple structure, easy operation, stability and reliability. It can be used for measuring the total activity of alpha beta in fields such as radiation protection, environmental samples, edible water, medicine and health, agricultural science, nuclear power plants, reactors, isotope production, and geological exploration.

• Main detector

Main detector

The main detector of this instrument is composed of ST-1221 low background alpha beta scintillator and CR120 low-noise photomultiplier tube. Its characteristics are: (1) ST-1221 scintillator is made by a new process, not afraid of pollution, the surface can be cleaned, durable, and inexpensive. (2) The counting area is large, with an area of 21cm2 (diameter 52mm); 15.9cm2（φ45mm）； 7.1cm2（φ30mm）， It can also be made according to the size requested by the user. (3) High sensitivity. β: 0.5 × 10-2~3 × 10-2Bq; α: 5 × 10-4Bq.

Anti coincidence detector

The anti coincidence detector is mainly used to reduce the background generated by muons in cosmic rays, and can also partially reduce the background generated by environmental radiation.
The anti coincidence detector consists of a 200mm × 30mm ST-401 parallel plate plastic scintillator and three CR119 photomultiplier tubes. The anti conformity efficiency is greater than 99%.

Lead chamber

The lead chamber of this instrument is shielded by 7.5cm lead and 1.5cm steel shell, with a total weight of approximately 200kg. The lead chamber is divided into upper and lower parts
The lead chamber, lower lead chamber, and upper lead chamber are detachable, making installation and maintenance very convenient. The lead thickness at the top and bottom of the lead chamber is 10cm.

electronic circuit

The electronic wiring of the instrument consists of a high and low voltage power supply, data acquisition and computer interface, and a BH1216 II single channel low background alpha beta measuring instrument with a main detector, which can simultaneously provide the total alpha and total beta activity concentration in the measured sample. It has the characteristics of high sensitivity, low background, simple structure, easy operation, stability and reliability.
This instrument can be equipped with any type of computer, and the measurement program runs in WIN95 and 98 environments. There are Chinese prompts during the operation process, and the measurement program is automatically completed and the results are printed.
All performance indicators of the instrument comply with the national second level standards and are better than similar products currently available internationally; It is the first generation product for simultaneous measurement of total alpha, total beta weak radioactivity using scintillation method both domestically and internationally; It is an ideal low background alpha and beta measuring instrument both domestically and internationally.
This product can be used for measuring the total activity of alpha and beta in fields such as radiation protection, environmental samples, drinking water, medicine and health, agricultural science, nuclear power plants, reactors, isotope production, geological exploration, etc.