Wireless sensors for ambient air temperature, relative humidity, contact temperature and lux measurements depending on
the models, with radio communication (869,450 MHz) to data logger.
Three sensor versions are available, two of which are equipped with two additional inputs for cable connection to external sensors:
EXP811.2 (2 temperature sensors);
EXP813.2 (N.1 temperature sensor, N.1 lux meter sensor).