Siemens Differential Static Pressure Airflow Switch, Automatic Reset, SPDT

Siemens 141-0518 Aluminized Steel Airflow Switch senses static differential pressure and at setpoint open/closes a set of electrical contacts. This Switch actuates electrical circuits (positive pressure), fan inlet (negative pressure), or across the fan (differential pressure) to detect excessively high positive pressures or low negative pressures and turn off the fan before damage occurs to ducts or dampers.

The auto reset switch should be used for applications that require positive proof of airflow (or fan operation) or detect high differential pressures associated with dirty air filters or similar maintenance alarms that do not require safety lock or (shut down) of the fan.

Features
Can be used in multiple applications: Proof of flow, High limit cut out or Filter ‘dirty’ indication.
Sample Line Connectors, .2 connectors, complete with nuts and ferrules, which accept 1/4" (6 mm) OD copper or polyethylene tubing
Body has Zinc-plated Steel with blue erudite dip
Can be mounted in any position as long as the diaphragm is in any vertical plane