The Series A19 is a small, compact control with adjustable or fixed differential. Controls supplied with adjustable differential have an internal scale plate
indicating increments of differential. The controls are supplied with adjusting lever at minimum differential stamped on the control. To adjust move the lever to the differential required. Models are available with or without external range adjustment and visible scale. External range adjustment may be by screwdriver slot or range adjusting knob
These controls are designed for open low and open high applications. Where critical or high value products are to be maintained within a specific
temperature differential, a single control should not be applied to function as both an open low and open high control. In these applications, a separate backup control with alarm contacts should be wired to indicate when the back-up control operates.
Features
• Dependability -- precision snap-acting dusttight contacts.
• Dependability -- low volume, responsive liquid filled sensing elements.
• Wide choice of temperature control functions with a minimum number of models.
• Precision “repeat” accuracy which is unaffected by barometric pressure and cross ambient problems.
• Special close differential models available.