The PF2W Digital Flow Switch User Manual provides ordering information, specifications, wiring, installation and safety guidelines for the PF2W series flow…
This manual covers the full range of PF2W digital flow switches, describing how to order the correct model, the available flow‑rate ranges, output types (NPN/PNP open collector), and power requirements. It also details the mechanical dimensions, port sizes, and environmental ratings such as IP65 and operating temperature limits.
Installation and wiring instructions are included, with diagrams for sensor and monitor units, lead‑wire options, and safety precautions. A parts list and troubleshooting tips help users maintain reliable operation.
| Flow rate range | 0.35 to 4.5 L/min (varies by model) |
|---|---|
| Output type | NPN open collector, max load 80 mA |
| Power supply voltage | 12 to 24 VDC ±10 % |
| Operating temperature range | 0 °C to 50 °C (operating), –25 °C to 85 °C (stored) |
| Withstand voltage | 1000 VAC for 1 min between terminals and housing |
| Insulation resistance | ≥ 50 MΩ (500 VDC test) |
The NPN open collector output can handle up to 80 mA of load current.
It operates from 0 °C to 50 °C and can be stored from –25 °C to 85 °C.
The accumulated flow counter resets automatically when the power supply is turned off.
This manual explains 7 error codes. Open a code for its meaning, causes and what to do: