The "/U" suffix typically denotes Resideo trade packaging
this model is part of the VT series designed for hot and chilled water
moisture ingress in open enclosure designs
which prevents scoring on the cylinders and protects the valves from fouling
Can I use this for both positive and negative pressure tracking
Dwyer Instruments 862E Thermostat 321142-301 The "/U" suffix typically denotesThe Dwyer Instruments 862E Thermostat is a heavy duty, explosion proof temperature control engineered for hazardous environments. Utilizing a liquid filled capillary sensor, this SPDT thermostat provides reliable switching for heating, cooling, or ventilation systems in Class I, Groups C & D and Class II, Groups E, F, & G locations. With a temperature range of 36F to 82F (2C to 28C), the 862E ensures precise thermal regulation in volatile atmospheres