DingLi's Enclosure Heaters are designed for freeze and condensation protection. These rectangular-sharpped wire-wound silicone rubber heaters vulcanized to an aluminum mounting plate, are effictive, reliable and safe. It is recommended that the heaters should be used with an adjustable thermostate or digital temperature controller mounted remotely. An sensing thermostat separated from the heater, provides better peformation comparison with Built-in thermostat. You can find suitable contollers in our product catalogue. If need the heaters with Build-in thermostat, please contact us.