McDonnell & Miller 304300 Snap Switch Els PW 17895 Accuracy Preservation: Minimizes direct solar

Accuracy Preservation: Minimizes direct solar gain and foreign matter accumulation to ensure precise ambient temperature sensing

Built for the rigors of field use

Remove the lens or use the adjustment screw on the pointer hub to zero the needle while the bulb is submerged in the slurry

What does 'Mid Point Ground' mean for my installation

Installation Versatility: The non-positional design and snap-off bracket allow for seamless integration in any orientation

McDonnell & Miller 304300 Snap Switch Els PW 17895 Accuracy Preservation: Minimizes direct solarThe McDonnell & Miller 304300, also identified as the FS1 17 Snap Switch Assembly, is the critical single pole, double throw (SPDT) replacement component designed for Series FS1, FS4 3D, FS5, FS6, and AFE 1 liquid flow switches. This industrial grade switch is engineered specifically for high sensitivity applications in hydronic heating and HVAC systems where detecting low or moderate flow rates is vital for system protection. As an OEM replacement