B2 pulse proportional stat

 The B2 Thermostat is designed to give precise microprocessor controlled temperature of non light emitting heat sources up to 600
watts. This may include heatmats and ceramics. 

The heater must be a minimum of 5 watts.

The B2 is a pulse proportional thermostat which pulses the power to the heat source. For this reason pulse proportional thermostats are not
suitable for light emitting heaters i.e bulbs.