Some of the features of the T9501 harsh environment RH and Temperature sensor with Modbus RS485 output include but are not limited to: it is fully calibrated and temperature-compensated (“ready to use out of the box”); it has an IP67 rating, which means it is waterproof under certain conditions; it has a digital Modbus RS485 output; it is precise and accurate (±2% RH at 20% to 80% and ±0.5°C temperature accuracy), 14-bits; it has a low current consumption; it is designed for reliability in harsh environments; and it has “heater mode” capability for condensation recovery.