D1 Model Thermostats (DPST)
These are non-programmable, snap-acting, mechanical Double Pole, Single Throw (DPST) thermostats. A DPST switch turns up to two independent circuits on or off. All of these thermostats have options to include a NEMA 1 general-purpose enclosure and/or pilot light.
These controls are commonly used in tanks, ovens, cleaning baths, and many other applications and automatically turn off heating equipment when the set temperature is reached.