Technical parameters: 1. Energy resolution (for 137Cs) is better than 7.5%.

2. Measurement uncertainty: ≤± 20%.

3. Multi channel analyzer: 1024 channels; Differential nonlinearity: ≤± 20%; Integral nonlinearity: ≤± 0.1%.

4. Shielding room: weighing approximately 900kg, with a lead shielding thickness of 10cm.

5. Preset measurement time: 1 second to 97 days. The ruler displays the measurement progress, and if paused midway, the measurement can continue.

6. Analysis software: full spectrum analysis and least squares method.

7. System stability: ≤± 1% (8h).

8. A sample database with convenient retrieval.

9. Working environment: Temperature: 5 ° C to 35 ° C; Relative humidity: ≤ 90%; Power supply: AC220V ± 10%, 50Hz ± 1Hz.

Product features: 1. Multi functional measurement method

1. Routine testing: Detect the specific activity of radioactive nuclides radium (226Ra), thorium (232Th), potassium (40K) and the total specific activity of radium equivalent in building material powder samples, and directly give the internal and external irradiation indices (IRa and Ir).

2. Non destructive rapid testing: Created by the Beijing Geological Research Institute of the Nuclear Industry, the testing rules determine the specific activities of radioactive nuclides 226Ra, 232Th, and 40K in building materials. Advantages: Non destructive measurement, fast and non-destructive; Save measurement costs and improve work efficiency.

3. Activated carbon box method for measuring radon concentration in ambient air.

4. Activated carbon box method for measuring radon concentration in soil.

2、 Main configuration of the instrument: 1. Multi channel analyzer. 2. Multi channel analysis software. 3. Non destructive measurement software. 4. Activated carbon radon measurement software. 5. Lenovo dedicated computer and 17 flat screen monitor. 6. Windows XP operating system. 7. Multi functional lead chamber shared for powder measurement, non-destructive measurement, and activated carbon measurement. 8. Four standard sources for powder measurement: pure radium, pure thorium, pure potassium, and mixed validation samples.

3、 Complies with the national standard requirements of GB6566-2001 "Limits of Radionuclides in Building Materials". The instrument is certified by the Chinese Academy of Metrology and issued a calibration certificate.

Product Introduction: 1. Multi functional Measurement Method

1. Routine testing: Detect the specific activity of radioactive nuclides radium (226Ra), thorium (232Th), potassium (40K) and the total specific activity of radium equivalent in building material powder samples, and directly give the internal and external irradiation indices (IRa and Ir).

2. Non destructive rapid testing: Created by the Beijing Geological Research Institute of the Nuclear Industry, the testing rules determine the specific activities of radioactive nuclides 226Ra, 232Th, and 40K in building materials. Advantages: Non destructive measurement, fast and non-destructive; Save measurement costs and improve work efficiency.

3. Activated carbon box method for measuring radon concentration in ambient air.

4. Activated carbon box method for measuring radon concentration in soil.