IC 902 - Temperature Controller. The IC 902 is a range of single stage electronic on/off temperature controllers that operate heating and cooling applications. They are available for a PTC Temperature Sensor input as default and an 8A relay output for load management. - 3-digit display - 4 keys for easy controlling and programming - Fast and easy installation - PTC or NTC input variants - Standard parameter-selectable PTC or NTC temperature probes - Programming menu with different protection levels - IP65 protection (front panel)