Dwyer Instruments 1638-10 Dwyer Instruments Pressure Switches, 1630 Series Pressure Switch Range 3-12In WC MFG Item Number 1638-10 Series 1630 More specs More specs Contact Type SPDT Ambient Temperature -30-110 °F Connection Process: 1/8 NPT Female Electrical Connection Screw Terminals Gauge Proof Pressure 500 psig Net Weight 5.3 lbs Gross Weight 5.3 lbs Qty – + Add to Cart $623.80 each <% if (data.moq > 1 && data.formattedUnitPrice) { %>