Harwil Q12DS501.54SNO1 Flow Switch, Harwil Q12DS, 1/2" Male Pipe Thread, 2A

Product Overview

Compact in-line flow switch designed to detect liquid flow and protect pumps and equipment. Durable construction and a reliable 2 amp microswitch deliver dependable performance for pool and spa systems, heaters, boilers and filtration equipment. Easy to install with a 1/2 inch male pipe thread connection.

• Electrical Rating: 2A microswitch for control circuits and safety interlocks
• Connection: 1/2 inch male pipe thread
• Application: Flow detection for pumps, pool and spa equipment, water heaters, boilers, HVAC and filtration systems
• Construction: Engineered for wet environments with corrosion resistant materials and compact profile for inline installations
• Alternate Part Numbers: 26-578-1100, Q12DS501-54SNO1, Q12DS501.54SNO1, 608073, HRWQ12DS1, Q12DS1.54SNO1, Q12DS154SNO1, Q12DS50154SNO1, Q12DSMSC, Q12DS501.54SN01

Features and Benefits

• Reliable flow monitoring to prevent dry run and protect pumps
• Compact form factor fits inline with standard 1/2 inch pipe systems
• Simple wiring to integrate with control panels and safety circuits
• Multiple alternate part numbers improve cross reference compatibility

Installation Notes

• Install in a location with steady flow through the sensor body. Follow equipment manufacturer guidance for mounting orientation and wiring.
• Verify thread compatibility and use appropriate thread sealant for a leak free connection.
• Confirm electrical connections are rated for 2 amps and comply with local wiring codes.

Maintenance

• Inspect periodically for debris buildup and corrosion. Clean or replace as required to maintain accurate flow detection.
• Test switch operation during equipment maintenance to ensure continued protection.

Compatibility

Commonly used as a replacement or cross reference for the alternate part numbers listed above. Suitable for pool and spa controllers, pumps, boilers and many HVAC water flow applications.

Need help? Contact our support team with your system details and model numbers for compatibility confirmation and installation guidance.