Dwyer Instruments 1640-0 Switch 324846-701 the 150-1 casting ensures proper

the 150-1 casting ensures proper alignment for the float and rod assembly

and plunger hardware should be inspected and reused or replaced if worn

installing this OEM-spec part is essential for maintaining the ANSI B109

ideal for unit ventilators and fin tube casings

Dwyer Instruments 1640-0 Switch 324846-701 the 150-1 casting ensures properThe Dwyer Instruments 1640 0 Switch is a high precision differential pressure switch engineered for specialized HVACR applications requiring floating contact null switch logic. Unlike standard snap acting switches, the 1640 series utilizes a single pole double throw (SPDT) floating contact design to provide two distinct actuation pointshigh and lowwith a defined "null" zone in between. This makes it an ideal solution for motorized damper control and