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| Brand Name: | CESTSEN |
| Model Number: | RAD-S50 |
| MOQ: | 1 Piece |
| Delivery Time: | 7-15 Working Days |
| Payment Terms: | T/T |
Shenzhen, China — The RAD-S50 is a high-performance radon gas sensor module engineered by Wanyi Technology (brand: CESTSEN) for long-term continuous monitoring of radon concentration in indoor environments. Featuring a large-area silicon detector with static diffusion sampling, the RAD-S50 delivers reliable measurements across a wide dynamic range from 5 to 65,535 Bq/m³ with exceptional sensitivity of 0.027 cph/[Bq/m³].
The RAD-S50 radon detector measures radon gas concentration through the principle of static diffusion. By leveraging the radioactive properties of radon gas and its decay products, the sensor acquires alpha counts via a high-performance silicon detector (100mm² sensitive area, 10*10mm) and an advanced signal acquisition system. The integrated algorithm calculates precise radon concentration values, achieving continuous, unattended environmental monitoring with minimal power consumption.
| Feature | Benefit |
|---|---|
| High-Sensitivity Silicon Detector | 100mm² large-area detector with 0.027 cph/[Bq/m³] sensitivity ensures accurate low-concentration measurement down to ≤5 Bq/m³. |
| Static Diffusion Sampling | No pump, no fan — simplified system design with zero moving parts, reducing maintenance and improving long-term reliability. |
| Humidity-Insensitive Design | Measurement system is not sensitive to humidity variations, ensuring stable readings in diverse indoor environments. |
| Ultra-Low Power Consumption | Operating at just 3.0V with ≤150μW power draw, ideal for battery-powered IoT devices and remote monitoring stations. |
| Dual Communication Interface | Supports both UART (9600 bps) and I²C (≤400 kHz) protocols for flexible MCU integration. |
| Compact Form Factor | Ultra-compact 60*60*21mm dimensions enable seamless integration into space-constrained devices and portable instruments. |
| Parameter | Specification |
|---|---|
| Detector Type | Silicon Detector |
| Measurement Object | Radon Gas (²²²Rn) |
| Measurement Range | 5 – 65,535 Bq/m³ |
| Detection Sensitive Area | 100mm² (10*10mm) |
| Sensitivity | 0.027 cph/[Bq/m³] (0.982 cph/[pCi/L]) |
| Detection Lower Limit | ≤5 Bq/m³ |
| Background Count Rate | ≤0.05 cph (Nitrogen atmosphere) |
| Uncertainty | ≤10% after 120 hours (K=2, radon concentration >200 Bq/m³) |
| Measurement Time | ≥60 min (configurable) |
| Working Voltage | 3.0V DC |
| Power Consumption | ≤150μW |
| Communication Method | UART (9600 bps) / I²C (≤400 kHz) |
| Working Environment | 0℃ ~ +45℃, ≤90% RH (+45℃) |
| Storage Environment | -25℃ ~ +65℃, ≤90% RH (+45℃) |
| External Dimensions | 60 * 60 * 21 mm |
The RAD-S50 stands out with its exceptional balance of high sensitivity, ultra-low power consumption, and compact design. Unlike pump-based radon monitors that require regular maintenance, the passive static diffusion method ensures years of trouble-free operation. The dual UART/I²C interface provides plug-and-play compatibility with popular MCU platforms including Arduino, ESP32, STM32, and Raspberry Pi. Adjustable parameters allow customization of measurement intervals, alarm thresholds, and data output formats to meet diverse application requirements.
Each RAD-S50 sensor module is packaged in an anti-static protective bag with foam cushioning and shipped in export-grade corrugated cartons. Minimum order quantity: 1 piece. Supply capacity: 5,000 pieces per month. Delivery time: 3-10 working days. Payment accepted via T/T, For bulk orders, OEM customization, or technical inquiries, please contact Wanyi Technology (Shenzhen, China).
