Keep your home, workplace, or inspection site safe with the RM-75 Radon Detector—a high-precision, easy-to-use device designed to monitor radon gas and protect you from harmful alpha ionizing radiation. Built with an advanced self-developed radon pulse ionization chamber sensor, the RM-75 ensures reliable, real-time detection of radon concentration levels.

With a vibrant 2.1-inch HD touch screen, intuitive UI, and real-time display of temperature and humidity, the RM-75 offers clear, accurate data at a glance. Designed for convenience, it stores up to 508 days of historical data, automatically generates PDF reports, and connects to your computer via USB—no additional software needed.

Features

Precision Radon Detection
Features a high-accuracy pulse ionization chamber sensor developed in-house for dependable performance.

User-Friendly Touch Display
2.1" 480×480 resolution capacitive color screen with easy-to-navigate UI for smooth operation.

Real-Time Monitoring
Updates radon levels every 10 minutes, displays hourly averages, and records long-term data automatically.

Customizable Alerts
Set your own alarm thresholds and alpha tone notifications to stay informed and ventilate when needed.

Built-in temperature and humidity sensor (displayed on the About page)

Specifications

Sensors: High Precision Radon Ionization Chamber Pulse Sensor + Temperature and Humidity Sensor
Measurement Range: 2Bq/m³-20kBq/m³
Measurement Accuracy: ±10%
Reliable Data Measurement Time: 1 Hour
Battery Capacity: 5000mAh 3.7V
Battery Life: Approx. 12 days (with screen off)
Charging Port: Type-C port (green light always on when charging, off when full)
Charging Time: Approx. 6 hours for full charge (power off)
Alarm Time: 20 seconds every 10 minutes after over run
Testing Environment: -10℃~45℃ RH＜80% (data is not allowed to work beyond the range)
Size Weight: Diameter: 81mm, height: 130mm, weight: 320g.

Radon comes from soil, rock, air and water everywhere and building materials are the main source of indoor radon. Radon will continue to accumulate in sealed or poorly ventilated spaces, such as basements, garages, warehouses, etc. The simplest way to reduce indoor radon concentration is to enhance indoor ventilation.

Other highlights

Automatic PDF Reports
No software required—plug into your computer and instantly access downloadable PDF reports stored in the device.

Long-Term Data Storage
Keeps detailed records for up to 508 days, so you can track radon exposure over time.

Energy-Efficient Design
ECO mode automatically activates after 1 minute of inactivity to save power, with screen sleep and full monitoring still active.

Built-In Self-Test & Alerts
Automatically detects sensor issues and alerts you for peace of mind.

Durable & Protected
Rugged IP6X-rated shell resists dust and water spray from any direction, making it perfect for demanding environments.

2.1-inch high-resolutionHD capacitive touch screen

Simple and convenient operation, high touch sensitivity,high light transmission, scratch-resistant and wear-resistant,easy to read in a varietyoflight environments

Automatic generation of PDF reportsconnected to the computer can be exported data

Shutdown or re-measurement of the measurement history data will be automatically saved connected to a computer to obtain the corresponding PDF file


Provide rich graphical view function of history records of radon concentration, temperature and humidity, and data overview of time up to nearly one year can be viewed.Power on automatically starts re-measurement, or can be manually re-measured. The automatically generated PDF report can record up to 508 days of historical data.

12 days long-lasting battery life5000mA/h high-capacity lithium battery

Built-in 5000mAh rechargeable Li-lon battery,standard Type-C charging port can last about 12 days when the screen is off.

Automatic control of power consumption of screen measurement does not affect the night sleep

P6X rated bodywaterproofand dustproofdesign