What is the purpose of the NEMA 4 rating on this assembly

What causes a dual pressure switch to trip

Corrosion Resistance: Engineered to withstand extreme temperature fluctuations and environmental exposure without losing blade integrity

Precision Mixing: Optimized for blending fluid temperatures with a consistent 16 Cv capacity and 100:1 rangeability

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Dwyer Instruments TSW-250 Temperature Switch Freon What is the purpose ofThe Dwyer Instruments TSW 250 is a rugged, digital temperature switch designed for heavy duty HVACR and industrial processes. This dual stage temperature control features a weatherproof NEMA 4X enclosure, making it the standard for rooftop units and washdown environments. Operating on a universal 90 to 255 Vac power supply, the TSW 250 eliminates the need for separate models for different voltage requirements. The unit utilizes a precise PTC