Aranet4 PRO sensor

Aranet4 PRO sensor


*Please contact us for larger orders and bulk or Not-For-Profit discounts*


Aranet4 is an innovative battery-powered stand-alone wireless sensor for monitoring CO2, temperature, relative humidity and atmospheric pressure at home, school, office or another indoor environment. The device is portable, simple to install, easy to operate and lets you know when the monitored levels have become unhealthy.

Aranet4 PRO sensor 
Measurements CO2 (carbon dioxide), temperature, relative humidity, atmospheric pressure
Line of Sight Range Bluetooth up to 10 m / 33 ft
Aranet radio up to 3 km / 1.9 mi
Operating environment Indoor use
Transmitter power Bluetooth: -12 dBm or 4 dBm
(selectable by user)
Aranet LoRa radio: 14 dBm
Frequency Depends on base station instructions
Measurement range CO2                                     0-9999 ppm
temperature                      0 °C to 50 °C (32 °F to 122 °F)
relative humidity              0 % to 85 % RH
atmospheric pressure     0.3 to 1.1 atm (4.4 to 16.0 psi)
Measurement accuracy* CO2                                      0-2000 ppm: ±50 ppm or 3% of reading                                                                 2001-9999 ppm: ±10% of reading
temperature                      ±0.4 °C (0.72 °F)
relative humidity               ±3%
atmospheric pressure    ±0.001 atm
Sensor Uses the nondispersive infrared (NDIR) sensor to measure CO2
CO2 measure calibration Automatic or manual (at 420 ppm)
Data Transmission 1, 2, 5, 10 minutes
Data Protection Data encryption
Power options 2 AA Alkaline batteries
Battery life Up to 2 years**
Operating temperature 0 °C to 50 °C (32 °F to 122 °F)
Operating humidity 0% to 85% non-condensing
Dimensions 70 x 70 x 24 mm/2.76″ x 2.76″ x 0.94″
Weight 104 g (3.7 oz)
Construction Polycarbonate
Protection class IP20
Marking CE
Compatible base stations Aranet PRO (from v1.3.2)
Included 2 AA Alkaline batteries
Part number TDSPC003 (EU)




* For best accuracy, recommended operating range is 10°C to 40°C (50°F to 104°F) and 20% to 60% RH (non-condensing).
Prolonged operation beyond these ranges may result in a shift of sensor reading, with slow recovery time.
** Bluetooth pairing disabled, LoRa radio disabled, data transmission at a 10 minute interval.

Aranet4 is not impact resistant!
Do not use the device in high humidity environments (greater than 85%)!
Do not leave the device in direct sunlight!