AR431 is an APAR battery-powered wireless temperature sensor that sends readings over 868 MHz to an AR40x series recorder. Range is up to 200 m in open space, extendable to 400 m when USB-powered sensors act as repeaters.

• Measuring range: -30...+80 °C, 1 channel, probe in the housing or external
• Accuracy: ±0.5 °C at -10...70 °C, ±0.5...1.7 °C in the rest of the range
• Radio: ISM 868 MHz, 7 channels, measuring period 1 min to 4 h, set in the recorder
• Supply: 3.6 V AA battery, up to 4 years at room temperature with a period over 30 min
• Housing: portable, wall-mountable, IP20
• Environment: air and neutral gases, dust-free

Up to 16 sensors report to one recorder, which stores, displays and alarms on their readings - the sensor is not usable without it. Sensors with the retransmission function do not work in older systems without it; combining them means reprogramming every device in the system.

Complies with the RED directive 2014/53/EU.