CESTSEN Launches RAD-S40 Diffusive Radon Gas Sensor for Global Radon Monitoring Projects

Shenzhen Wanyi Technology Co., Ltd. (CESTSEN), a radon gas sensor manufacturer based in Shenzhen, China, has released the RAD-S40 diffusive radon sensor, a compact planar silicon detector module built for long-term indoor radon concentration monitoring. The sensor is now available to OEM and ODM customers, system integrators and distributors worldwide.

Built on a Planar Silicon Detector

The RAD-S40 uses the radioactive characteristics of radon gas and its daughters. Alpha counts are collected by a planar silicon detector with a 56 mm2 sensitive area (7.5 x 7.5 mm) and processed by an integrated signal acquisition system, which converts the count rate into a radon concentration value. This static diffusion design delivers stable, continuous measurement without pumps, filters or moving parts.

Key Features

• Low power radon concentration monitoring system that draws 150 uW or less at 3.0 V
• Insensitive to humidity for reliable readings in real indoor environments
• Maintenance free and calibration free operation throughout the service life
• Long-term continuous radon monitoring with a detection limit of 5 Bq/m3
• Digital UART and I2C interfaces for fast integration into monitors, gateways and controllers

Technical Specifications

Applications

• Radon gas measurement in homes, apartments and public buildings
• Static radon measurement for indoor air quality studies
• Long-term air radon monitoring in schools, offices and basements
• Integration into smart home, HVAC and building automation systems

Why the RAD-S40 Suits Serial Production

Radon monitoring products usually need a sensor that stays stable for years inside a sealed enclosure. The RAD-S40 combines a wide 5 to 65535 Bq/m3 range with a small 54.0 x 35.0 x 14.6 mm footprint and a simple two-wire digital interface, so hardware teams can add radon measurement to an existing board without redesigning the power budget. The humidity-insensitive detector also reduces calibration workload in the field, which matters for distributors who support end users remotely.

Manufacturer Supply and Customization

As a radon gas sensor manufacturer with production in Guangdong, China, CESTSEN supports sampling, trial orders and volume production. Minimum order quantity is one piece; stock units ship within three working days and production orders within 15 to 25 days, with a supply ability of 5000 pieces per month. Each sensor is packed in a CESTSEN branded color box with shock-proof foam insert and an export-grade corrugated carton, and the factory operates under ISO 9001:2015 with T/T payment terms.

About CESTSEN

Founded in 2011, Shenzhen Wanyi Technology Co., Ltd. develops and manufactures indoor air quality and environmental monitoring sensors, with around 70% to 80% of output exported to overseas markets. Distributors, integrators and brand owners looking for a dependable radon gas sensor manufacturer can contact the CESTSEN sales team for datasheets, samples and OEM pricing.