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The α/β Surface Contamination Monitor is designed for measuring alpha and beta radioactive contamination levels on personnel skin and clothing, as well as on object surfaces. It features high measurement accuracy, excellent sensitivity, and ease of operation, and is suitable for environmental radioactive contamination surveys.
The instrument provides audible and visual alarm indication upon exceeding preset alarm thresholds, alerting on-site personnel and ensuring radiological safety. It is intended for surface contamination detection in radiological workplaces and laboratories, including workbenches, flooring, walls, protective clothing, and human skin.
FEATURES
- ZnS(Ag) plastic scintillator detector coupled with a solid-state silicon photomultiplier (SiPM) as the detection unit, ensuring excellent response to both alpha and beta radiation.
- 4-inch color LCD touchscreen with a full operator interface, designed for intuitive operation and ease of use.
- Effective detection window area: 180 cm².
- User-selectable background subtraction (with/without) and adjustable background measurement time.
- Freely editable nuclide library.
- Data summarization and storage with on-demand retrieval and review capability.
- USB interface for measurement data export; storage capacity of 100,000 data records with power-loss protection.
- Integrated real-time clock (RTC) displaying year, month, and date; clock operation is unaffected by mains power interruption.
Applications
- Nuclear medicine departments of hospitals
- Nuclear power plants (NPPs)
- Radiological laboratories and radioisotope production facilities
- Health protection and disease control stations at all levels; environmental monitoring agencies
- Border entry/exit customs inspection
- Radioactivity testing of building materials such as stone and granite
Technical Specifications
| Parameter | Specification |
|---|---|
| Detector | ZnS(Ag) plastic scintillator detector + solid-state silicon photomultiplier (SiPM) |
| Detection Area | 180 cm² (360 cm² optional) |
| Detectable Radiation Types | α, β (simultaneous or separate measurement) |
| Display Units | cps, cpm, Bq, or Bq/cm² |
| Display | 4-inch color LCD touchscreen |
| Background Count Rate | α ≤ 0.1 cps; β ≤ 10 cps |
| Measurement Range | α: 0 ~ 5000 cps; β: 0 ~ 50000 cps |
| Detection Efficiency | ⁹⁰Sr-⁹⁰Y ≥ 35%; ²⁴¹Am (α) ≥ 30% (2π geometry) |
| Operating Environment | Temperature: −20°C to +45°C; Relative humidity: ≤95% (at 40°C) |
| Alarm Threshold | Continuously adjustable across full measurement range |
| Data Communication | USB interface for measurement data export |
| Data Storage | 100,000 data records with power-loss protection |
| Power Supply | 8.4 V, 10000 mAh rechargeable lithium battery |
| Housing | Aluminium alloy construction; rugged and durable |
| Dimensions & Weight | 310 × 140 × 85 mm; 1.3 kg (plastic housing) |
