DA-31-3-2 | 0/30"Vac SPST Mercury # Switch | Dwyer Instruments Cv / GPM_110 Cv Our HVAC supply store has

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DA-31-3-2 | 0/30"Vac SPST Mercury # Switch | Dwyer Instruments Cv / GPM_110 Cv Our HVAC supply store has0 30" Vac SPST Mercury # Switch Dwyer Instruments [SKU: DA 31 3 2] Dwyer Instruments' DA 31 3 2 is a 0 30" Vac SPST Mercury # Switch. This switch is designed for use in a variety of applications, including: * HVAC systems * Vacuum systems * Refrigeration systems * Medical equipment The DA 31 3 2 is a single pole, single throw switch with a mercury contact. The switch has a normally open contact that closes when the vacuum reaches 0" Vac. The switch is