Its compatibility with Fenwal spot-type detectors ensures precise alignment and consistent performance in demanding high-airflow ventilation applications where sensing accuracy is paramount for life safety systems

this unit is a verified cross-reference for the Wilbur Curtis WC-1865 "SPB" series black plastic faucet

the knurled brass design often allows for reliable hand-tightening to establish a proper electrical ground

Does this switch require professional calibration

but you must never go lower

Cleveland Controls AFS-A-173 Pressure Switch Its compatibility with Fenwal spot-typeThe Cleveland Controls AFS A 173 is a high performance adjustable pressure switch designed for critical airflow proving in package burners, furnaces, and fuel burning equipment. This SPDT air pressure switch offers a versatile field adjustable set point range from 0. 05" 0. 02" w. c. to 12" w. c., allowing for precise calibration in positive, negative, or differential pressure applications. Built with a plated housing and a durable silicone diaphragm,