The System Sensor WFD20EXP Explosion Proof Waterflow Detector. 2″ pipe, 1.25″ hole
• Designed and approved to operate in hazardous locations
• NEMA 4 enclosure rating
• Sensitivity-setting spring mechanism located outside of explosion environment
• Sealed retard mechanism
• Visual switch activation
• Synchronized activation circuit
• Field-replaceable terminal block and retard mechanism
• Only one conduit