Flow Switch, Harwil, 1/2" MPT, 3 GPM On 1 Amp, For 3/4" Plumbing : Q12DS-3-3-4S-1

Product Details

The Harwil Q-12 Flow Switch is a versatile fluid flow verification device widely used in pool, spa, and fluid control systems since the mid-1980s. It offers adjustable settings to suit various applications, ensuring safe and efficient operation by confirming adequate flow before activating connected equipment.

• Model: Q12DS-3-3-4S-1
• Plumbing Connection: 1/2" Male Pipe Thread (MPT)
• Flow Activation: 3 GPM at 1 Amp
• Compatible Pipe Sizes: 3/4" to 6" diameter pipes
• Flow Range: 0.7 to 590 GPM
• Maximum Flow: Up to five times the normal flow rate
• Pressure Drop: Typically less than 1.0 psig at normal flow
• Electrical Switching Capability: 5 VDC to 240 VAC, suitable for driving small ice cube relays and some 30A power relays
• Alternate Part Number: Q-12DS50/3/4/4S/NO/1 (Harwil)

The Q-12 Flow Switch is commonly used to verify fluid flow in applications such as swimming pool salt chlorine generators, spas, hot tubs, chillers, and home water disinfection systems, helping to protect equipment and ensure safe operation.