Temperature: -199.9 to +199.9 / 399.9 C; humidity: 1-3 V (20-90%), 0-10 V (0-100%) & 0- 5 V (0-100%); supply voltage: 5 V / 12 V / 24 V; resolution: 0.1 C; accuracy: 0.1 C (+199.9 range), 0.2 C (+399.9 range) +/- 1 digit; relay: 230 V / 5A or open collector maximum 3 numbers, storage: 8k / 32k / 64k memory and size 96 x 96 x 150 mm (DIN standard).

Microcontroller based digital circuitry; two row four digit LED display for parameter indication; dust proof membrane keypad for programming; input interface: Pt 100 RTD for temperature; RTD for Dry / Wet bulb technique or 4 to 20 mA from humidity sensor or 0 to 10 V or 0 to 3 V from humidity sensor (factory set); control algorithm independent PID; non volatile RAM storage to retain set point in case of power failure; control relay outputs rated 230V / 5A (resistive) or open collector outputs; high & low setpoint with relay output for compressor control; RS 232 serial interface for PC or serial printer (optional) & real time clock (optional).