Industrial-Grade Construction: Built with high-temp materials to prevent warping and premature failure in high-cycle environments

Precision Dimensions: Features a 2-inch ID and 10

Dead-End Lock-Up: The lever-acting design provides a tight seal to prevent downstream pressure spikes when appliances are cycled off

It is recommended to use a new high-temp silicone or fiberglass gasket during installation to maintain an airtight seal at the furnace collector box

and Intertherm units to ensure exact pin mapping

Siemens Combustion QRA4M.U Scanner Els PW 17895 Industrial-Grade Construction: Built with high-tempThe Siemens Combustion QRA4M. U is a high sensitivity UV flame scanner engineered for the rigorous supervision of gas or oil flames and ignition spark proving in intermittent burner operations. As a veteran grade flame detector, this sensor utilizes a specialized UV sensitive cell with two electrodes designed to ignite upon detecting radiation within the 190 to 270 nm spectral range. This ignition triggers the necessary current in the flame detector