Transtech’s DTT1 is a very robust and service proven Door Threshold Thermostat typically used to control door threshold temperature in snowy and icy conditions. The DTT1 has been specially designed to meet transit industry standards. For dust and water ingress protection, it meets the IP67 standard requirements. This DTT1 consists of a normally close contact (at 25°C) which opens when the threshold temperature reaches the high temperature setpoint. When connected to a heating system, the DTT1 allows to maintain the threshold temperature near the preset setpoint.