Overview
The YD-Ra01 Radon Monitor is a fully automatic, continuous sampling radon measurement device using a micro pump for air, soil, and water applications. It employs a micro pump combined with electrostatic collection of the radon decay product RaA (Po-218) as the measurement target. The instrument complies with the sampling and measurement requirements of GB/T 14582-1993, enabling quantitative measurement of radon concentration in soil or air.
The device features high sensitivity and ease of operation, eliminating the inconvenience of manual sampling and external interference factors, and delivers real-time measurement results. The measurement time can be set between 1 and 120 minutes depending on the radon level, making it one of the more highly automated instruments for soil radon detection in China. It meets the soil radon measurement requirements of GB 50325 “Code for Indoor Environmental Pollution Control of Civil Building Engineering”, and is widely used in civil construction engineering, radioactive exploration (emanometry), hydrogeochemical prospecting for water radon concentration, underground water source detection, earthquake prediction, environmental protection engineering, scientific research and teaching, as well as radon level surveys and radon mitigation studies. The instrument complies with the verification requirements of JJG 825-2013 “Radon Monitors”.
Features
- Built-in measurement chamber with a volume of 0.8 L
- Adopts the pump-suction electrostatic collection measurement method, with a micro vacuum pump system maintaining the sampling flow rate at approximately 1 L/min
- A desiccant is used at the sampling inlet to eliminate the influence of humidity on measurement
- The detector is a high-sensitivity alpha-particle semiconductor device, which converts alpha particles into electronic signals. The amplitude of the electronic signal is measured through electrostatic collection and amplification circuitry, thereby identifying the energy of incident alpha particles
- The instrument accurately measures Po-218 particles generated by indoor radon decay, featuring good energy resolution and high detection efficiency
Specifications
| Parameter | Specification |
|---|---|
| Detector | Semiconductor detector, insensitive to gamma radiation |
| Display | Dot-matrix LCD |
| Measurement range | 0 – 1,000,000 Bq/m³ |
| Uncertainty | <15% (when radon concentration >200 Bq/m³) |
| Sensitivity | 50 cpm/(Bq/m³) |
| Micro pump flow rate | 1 L/min |
| Working mode / sampling cycle | Continuous measurement mode: 26 min; Precision mode: adjustable 5–99 min; Fast mode: can be set to 15 min |
| Data interface | RS232 serial port, real-time data cable, USB port for data saving; the device can store up to 1,000 data records |
| Operating environment | Temperature: -20 ℃ to 45 ℃; Relative humidity: ≤95% |
| Dimensions | 385 mm × 370 mm × 235 mm |
| Weight | 6.0 kg |