2 independent relay outputs or neutral zone- Indication by 3-digit digital display- LED indicating status of relay- Case 72 x 72 x 90 mm Dual voltage supply 24V and 230V- Working range from -99 to + 999 °C- Multi-SENSOR inputs (SENSOR not supplied): thermocouple J (from -100 to +750 °C) thermocouple K (from -100 to +999 °C) PT100 2 or 3 wires (from -100 to +700 °C) PTC (from -50 to +150 °C) NTC (from -40 to +110 °C) 0/4-20 mA for transducer Operation in hot or cold conditions– Adjustable hysteresis and calibration- Built-in alarm buzzer Plug-in rear terminal block- Attaching cbulbs with side fastenings