Radon Sensor


Sensoria1 Rn is a measuring device intended for continuous measurement of radon concentrations. Beside radon concentrations it reports also air pressure, temperature and relative humidity. Temperature and relative humidity data have important role in signaling out of operating range conditions while pressure data are correlated with radon concentrations.  The diffusion of radon from ground into buildings is higher during low air pressure conditions.


Important facts: 

– Warranted lifetime is 5 years, expected lifetime is more than 30 years. 

– Periodic calibration is not required.


Sampling period is 15 minutes. Each sample consists of:

  • Rn concentration in the last hour, day, week and month in Bq/m3 (pCi/L),
  • relative humidity of the air in %, 
  • air temperature in °C (°F), 
  • air pressure in hPa/mbar (psi).


Detector type 

Mode of operation

semiconductor diode 

diffusion mode, alpha spectrometry

Radon concentration range

 Measurement uncertainty

0 Bq/m3 … 65,555 Bq/m3 

< 20% v 24h@500Bq/m3

Sensitivity7 cph/(kBq/m3)
Air pressure measuring range260 hPa … 1260 hPa (accuracy: ±1hPa, 0 … 80 °C)
Temperature and humidity 

measuring range

-10°C … 85°C 

0%RH … 100RH% 

Operating temperature range 

Operating humidity range

0°C … +40°C 

0%RH … 95%RH non condensing

Available communication interfaces/protocolsWiFi/MQTT, Ethernet (PoE)/MQTT,  LoRa/LoRaWAN, RS485/Modbus RTU
Power supply voltage range/ 

current consumption

WiFi (+5VDC/200mA), Ethernet (PoE) (+48VDC/30mA) 

LoRa (+5VDC/3mA), LoRa bat (2xAA alkaline or NiMH/ 80uA),  

RS485 (+5VDC …+24VDC/10mA

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