Function:The DBTZ electro-mechanical thermostats are constructed around a fluid-filled capillary bulb with 200 mm spring protection and sensor housing that transfers the changes in temperature to a micro-switch. The micro-switch is capable of breaking up to 15 A at 230 V AC. It comes in a 1-step or 2-step model.Features:HYSTERESIS:1-step models are available featuring either fixed or adjustable hysteresis.2-step models have fixed hysteresis.STEP DIFFERENTIAL:In the 2-step thermostats, the step differential can be adjusted 2…5 K.SETPOINT ADJUSTMENT:The thermostat is available with a setpoint adjustment knob on the outside or under the cover. It is also possible to recalibrate the scale using the hexagonal nut under the knob.