Flow Switch, Harwil, 1/2" MIPT Connection, SPST w/36" 2 Pin Amp : Q12DS

Product Details

The Harwil Q-12 Flow Switch is a versatile fluid flow verification device widely used in pool, spa, and fluid control applications since the mid-1980s. Designed to ensure proper flow conditions, it helps protect equipment such as heaters, chillers, and water disinfection systems.

• Connection Type: 1/2" Male Iron Pipe Thread (MIPT)
• Switch Type: Single Pole Single Throw (SPST)
• Lead Wire: 36" 2-pin AMP connector
• Flow Range: 0.7 to 590 gallons per minute (GPM)
• Maximum Flow: Up to five times the normal flow
• Pressure Drop: Typically less than 1.0 psig at normal flow rate
• Electrical Rating: Switches voltage from 5 VDC up to 240 VAC
• Power Handling: Can power small ice cube relay coils and some 30A power relays
• Compatible Pipe Sizes: Suitable for pipes ranging from ¾ inch to 6 inches
• Alternate Part Number: 5-20-0007

The Q-12 flow switch is factory adjustable to meet diverse application requirements. It is commonly used to verify fluid flow before activating devices such as salt chlorine generators, water heaters in spas or hot tubs, chillers, and home water disinfection systems, helping to protect equipment and ensure safe operation.