WFC is a flow sensor that measures the flow of conductive fluids that do not corrode the wetted part materials by capacitance detection. This standard type has an NPN or PNP switch output and a voltage or current analog output, in two flow rate ranges: 0.5 to 15 L/min and 2.0 to 60 L/min.
| Applicable Fluids | Water and fluids (conductive fluids) that do not corrode the wetted part materials |
| Available Fluid Conductivity | 5 µS/cm or more |
| Detection | Capacitance |
| Rated Flow Range | WFC-150: 0.5 to 15 L/min, WFC-600: 2.0 to 60 L/min |
| Port Size | WFC-150: Rc3/8, G3/8, 3/8NPT; WFC-600: Rc1/2, G1/2, 1/2NPT or Rc3/4, G3/4, 3/4NPT |
| Low Flow Cut Flow Rate | Measured range max. flow rate of 3% |
| Working Fluid Temperature | 0 to 85 °C (no freezing) |
| Response Time | 0.25 s / 0.5 s / 1 s / 2 s / 5 s (default 1 s) |
| Working Pressure | 0 to 1.0 MPa (fluid temperature 0 to 85 °C), 0 to 2.0 MPa (fluid temperature 0 to 50 °C) |
| Proof Pressure | 3.0 MPa |
| Repeatability / Temperature Characteristics | Repeatability ±2.0% F.S.; ambient temperature characteristics ±5.0% F.S. (base temperature 25 °C); fluid temperature characteristics ±5.0% F.S. (base temperature 25 °C) (at response time 1 s) |
| Integrating Flow Range | 0.0 to 99999999.9 L (0.1 L increments) |
| Pressure Loss | 0.02 MPa or less (at max. rated flow) |
| Switch Output Rating | Max. load current 50 mA; max. applied voltage 30 VDC; internal voltage drop NPN 2.0 V or less / PNP 2.4 V or less; output protection: overcurrent abnormal alarm, overcurrent protection |
| Switch Output | NPN or PNP transistor output (order codes N / P) |
| Output Mode | Select from hysteresis mode, window comparator mode, integrated output mode, integrated pulse output mode and alarm output mode |
| Analog Output | Voltage output 1 to 5 V (load impedance 50 kΩ or more); current output 4 to 20 mA (load impedance 500 Ω or less) |
| Switch Input | Input time 20 ms or more; short-circuit current approx. 2 mA |
| Display | 2-screen display (main: green/red 2-color, sub: white), screen flip possible; instantaneous flow rate 3 digits, integrating flow 4 digits; screen refresh cycle 5 times/sec |
| Display Unit | Instantaneous flow rate L/min, integrating flow L, kL, ML |
| Power Supply Voltage | 24 VDC ±10% (ripple P-P ±10% or less) |
| Current Consumption | 65 mA or less |
| Degree of Protection | IP65 equiv. (when the cable option is mounted) |
| Operating Ambient Temperature / Humidity | 0 to 50 °C (no condensation) / 35 to 85% RH (no condensation) |
| Mounting Orientation | Unrestricted in vertical/horizontal direction |
| Compliant Standards | EC Directives (EMC Directive, RoHS Directive) |
| Material of Wetted Parts | PPS, FKM, CAC804, C6931 |
| Body Weight | WFC-150: approx. 460 g; WFC-600 (1/2 series): approx. 490 g; WFC-600 (3/4 series): approx. 520 g; bracket approx. 30 g |
| Order Code (Switch/Analog Output) | Switch output: N NPN, P PNP; analog output: V voltage (1 to 5 V), A current (4 to 20 mA); included options: C3 cable (M12/4-conductor/3 m), L3 L type cable, B bracket |