LB-2 low background α/β measuring instrument is mainly used to accurately measure the specific activity of low level total α and total β of various substances. Used for environmental protection, for water, air, soil, buildings in the detection of radioactivity; Used for sanitation and epidemic prevention, for radioactivity detection in drinking water, food, vegetables, milk and milk products; Used for building materials inspection, granite, marble, sand, cinder block, slag block and other radioactive inspection; Used for monitoring emissions, atmosphere and environment from nuclear power and other nuclear facilities; Others can also be used for radiation protection, health physics, biomedical research, agriculture, archaeology, geology and so on.


Technical indicators


1. There are two independent low background αβ main detector, can measure two samples at the same time, respectively give two samples in the total α, total β activity concentration measurement, with high sensitivity, low background, simple structure, easy to operate, stable and reliable characteristics.

2. When the 2π detection efficiency ratio of β source (active zone Φ20mm) is ≥ 60%, the background count rate per unit area is ≤0.10cm-2min-1.

3. When the 2π efficiency ratio of α source (active region Φ30mm) is ≥ 85%,

Background counting rate per unit area ≤0.002cm-2min-1.

4. Channel ratio: α into β channel ≤1%, β into α channel ≤0.1%.

5. Efficiency stability: α < 2%, β < 3%.

6. Instrument sensitivity: α=5×10-4Bq; Beta = 1 x 10-3 bq.

7. Repeatability: the instrument is continuously energized for 24 hours, the efficiency change of each detector is < ±5%.

8. Insulation resistance ≥2MΩ, voltage insulation > 1500V.

9. Use the ambient temperature 5-40℃, relative humidity < 90%.

10. Power supply: AC 220V±10%, 50HZ, power consumption ≤20W.

Instrument configuration

1. One cabinet

2. One main machine of measuring instrument

3. 1 set of lead chamber

4. Two main probes

5 anti - coincidence probe 2

6. Two HND-Br scintillators

7. Anti-conforming plastic scintillator 1 piece

8. 1 bottle of 241Am reference material

9. 1 bottle of kcl reference material

10. 40 sample plates

11. 2 lead handle

12. 1 cross screwdriver

13. 4 high-voltage cables

14. 4 low-voltage cables

15. 4 signal cables

16. 1 communication line

17. 1 power cable

18. 1 USB flash drive

19. 1 copy of instruction manual

20. One copy of procedure operation manual

21. One copy of warranty

22. 1 copy of quality certificate

23. One computer

24. One LCD monitor

25. 1 printer

26. One legal measurement certificate

27. Responsible for technical support and training
The instrument has been strictly verified by the national metrology department http://www.haiqiang123.com