All Series A19 temperature controls are designed for use only as operating controls. These controls are designed to cover a broad range of general purpose operating temperature control applications in the refrigeration, air conditioning and heating field with a minimum number of models. Typical applications are: frozen food cases, display cases, beverage coolers, milk coolers, walk-in oxes, water chillers, etc. Various control ranges are available to cover working temperatures from -30 to 225F (-35 to 105C). Features: Precision, snap-acting dust-tight contacts Available with NEMA 1 (shown) or NEMA 4X (weatherproof) enclosure Various temperature ranges and sensing element styles Precision “repeat” accuracy and resistant to barometric pressure or cross ambient conditions