Compact controller with built in Sensor Low Velocity 0.3 to 1.8 m/s Power output 24VAC - 350mA LCD display standard Keyboard standard Auto Zero standard PID Control output on 0-10V 4-20mA or 24VAC open - off - closed. Modbus RTU Communication standard Linearity 1% of Full Scale Ukas Calibration Certificate standard Remote Modbus Display connector standard One alarm contact Buzzer fitted ABS plastic enclosure IP65.