Dwyer Instruments 1640-0 Switch 318423-701 The brass body construction provides

The brass body construction provides structural integrity

the R120AAA-701 features high-grade electrical contacts capable of handling the inductive loads characteristic of PSC motors and single-phase condenser fan motors

Double Shaft Design: Specifically configured to drive dual centrifugal wheels

the Carrier HF680025 is the current manufacturer-designated replacement for the HF23BL005

Dwyer Instruments 1640-0 Switch 318423-701 The brass body construction providesThe 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