Hayward Rotary Flow Sensor, CAX-20203

Hayward CAX-20203 CAT Rotary Flow Sensor

The rotary flow sensor is used in Hayward’s CAT commercial automation systems to:

• Verify minimum flow before chemical feed

• Protect pumps and chemical injection systems

• Provide real‑time flow data to CAT 1000/2000/4000 controllers

• Prevent dosing when flow is insufficient (critical for commercial code compliance)

It is a moving‑paddle rotary sensor, not a paddle‑switch or magnetic turbine.

Compatibility

All product cards confirm use with:

• CAT 1000

• CAT 2000

• CAT 4000

• Hayward commercial automation systems using rotary flow monitoring

If your controller is a CAT‑series unit, this is the correct sensor.