SMC PF3W711-N10-BT-MRA Digital Flow Switch for Water, 10–100 L/min, 1" NPT, Dual PNP, Temperature Sensor, with Calibration Certificate, 3-Color Display, IP65
SMC
$825.60
The SMC PF3W711-N10-BT-MRA is a 3-color digital flow switch for water in the larger PF3W7 body, rated for 10 to 100 L/min through a 1" NPT port, with dual PNP switch outputs, an integrated temperature sensor, mounting bracket, M8 connector lead wire (3 m), and a traceable flow calibration certificate shipped with the unit. Built for higher-volume chiller mains, multi-zone cooling distribution headers, and large mold-cooling loops where flow rate, fluid temperature, and out-of-the-box traceability all matter.
Key Features
- Factory calibration certificate included. The trailing "A" code adds a flow-rate calibration certificate (English/Japanese) shipped with the unit — ships ready for audits, FDA/GMP installations, and validated systems without a separate cal step.
- Dual PNP switch outputs. OUT1 and OUT2 are both PNP open-collector switch outputs. OUT1 trips on flow; OUT2 can be user-assigned to flow OR temperature — two independent trip points from one device.
- 10–100 L/min rated range. The PF3W711 is the larger body in the PF3W7 family, sized for higher-volume cooling and process water lines — 1" NPT inlet/outlet handles 100 L/min (~26.4 gal/min) continuously.
- Integrated temperature sensor. Monitor fluid temperature alongside flow on a 0–100°C rated range (display –10 to 110°C, ±2°C accuracy), with the second output assignable to a temperature setpoint trip.
- 3-color, 2-screen rotatable display. Main screen shows instantaneous flow in red or green for at-a-glance status; white sub-screen displays set value, accumulated flow, peak/bottom, line name, or temperature. Display rotates 90° CCW / 225° CW in 45° increments.
- Karman vortex detection. No moving parts in the primary flow path — no impeller wear, no paddle fouling, no orifice plugs.
- Non-grease wetted parts. PPS body and sensor, SCS13 stainless attachment, SS304 temperature sensor, FKM seal — suitable for water and ethylene glycol aqueous solutions (viscosity ≤ 3 mPa·s).
- IP65 enclosure with C-UL-US listing, CE marking, and RoHS compliance.
- Bracket and 3 m M8 lead wire included.
PF3W711-N10-BT-MRA Part Number Breakdown
Each segment of the SMC PF3W7 part number specifies a configuration option. Here is exactly what you receive when you order PF3W711-N10-BT-MRA:
| Code Segment | Meaning |
|---|---|
| PF3W7 | PF3W7 series, integrated display, 3-color digital flow switch for water |
| 11 | Rated flow range 10 to 100 L/min (PF3W711 body) |
| (no S) | No flow adjustment valve |
| N | NPT thread type |
| 10 | 1" piping port size |
| B | OUT1: PNP open collector switch | OUT2: PNP open collector switch (assignable to flow or temperature) |
| T | With integrated temperature sensor |
| (no code) | Lead wire with M8 connector (3 m) included — default |
| M | Display units: L/min flow, L accumulated, °C temperature (SI) |
| R | With mounting bracket (ZS-40-M, includes 4 tapping screws M4×10) |
| A | With factory calibration certificate (flow rate only; English/Japanese) |
Specifications
| Series / Body | PF3W7, integrated display — PF3W711 (10–100 L/min) |
| Applicable fluid | Water, ethylene glycol aqueous solution (viscosity ≤ 3 mPa·s / 3 cP) |
| Detection method | Karman vortex |
| Rated flow range | 10 to 100 L/min (approx. 2.6 to 26.4 gal/min) |
| Display flow range | 7 to 140 L/min (below 7 L/min shown as 0) |
| Set flow range | 7 to 140 L/min |
| Smallest settable increment | 1 L/min |
| Accuracy | ±3% F.S. (display) |
| Repeatability | ±2% F.S. |
| Temperature characteristics | ±5% F.S. (25°C standard) |
| Fluid temperature range | 0 to 90°C (no freezing or condensation) |
| Operating pressure range | 0 to 1 MPa (0 to approx. 145 psi) — derates at higher fluid temperature |
| Proof pressure | 1.5 MPa |
| Pressure loss | 60 kPa or less at maximum flow |
| Switch output (OUT1) | PNP open collector, max load 80 mA, max applied voltage 28 VDC, internal voltage drop ≤ 1.5 V at 80 mA |
| Switch output (OUT2) | PNP open collector, same electrical specs as OUT1 (assignable: flow rate or temperature) |
| Response time (switch) | Selectable 0.5 s / 1 s / 2 s |
| Output modes (flow) | Hysteresis, window comparator, accumulated output, or accumulated pulse output |
| Output modes (temperature) | Hysteresis or window comparator |
| Temperature sensor rated range | 0 to 100°C (display –10 to 110°C, 1°C increment, ±2°C display accuracy) |
| Accumulated flow range | 999,999,999 L (1 L resolution) |
| Display | 2-screen: main 4-digit 7-segment red/green, sub 6-digit 11-segment white; 5 updates/second; rotatable 90° CCW / 225° CW in 45° steps |
| Power supply | 12 to 24 VDC ±10%, 50 mA or less |
| Piping port | 1" NPT female |
| Connection | M8 connector, 4-wire, 3 m lead wire included |
| Wetted parts | PPS (body, sensor), SCS13 (attachment), SS304 (temperature sensor body and shaft), FKM (seal) — non-grease |
| Enclosure rating | IP65 |
| Operating temperature | 0 to 50°C (no freezing or condensation), 35 to 85% RH |
| Standards / compliance | C-UL-US listed, CE marking (EMC, RoHS directives) |
| Calibration | Factory flow-rate calibration certificate included (English/Japanese) |
| Weight | Approx. 945 g (sensor with temperature sensor + 3 m lead wire) |
| Wiring | Brown = DC (+), Black = OUT1, White = OUT2, Blue = DC (–) |
M8 Connector Pin Assignment
| Pin | Signal | Wire Color |
|---|---|---|
| 1 | DC (+) | Brown |
| 2 | OUT2 (PNP switch, assignable: flow or temperature) | White |
| 3 | DC (–) | Blue |
| 4 | OUT1 (PNP switch, flow rate) | Black |
Typical Applications
- Chiller and cooling-water mains — the 10–100 L/min, 1" NPT format suits process chiller supply/return headers and central cooling distribution, with the calibration certificate satisfying audit and qualification requirements.
- Large mold-cooling loops — main-line flow and temperature supervision on injection molding, die casting, and blow molding cooling circuits, where 100 L/min throughput is typical.
- Industrial laser, plasma, and welder cooling — supervise the cooling water feeding higher-power source equipment, with PNP outputs interfacing directly to common PLC sinking inputs.
- Hydraulic power unit and lube-oil cooler water side — monitor the cooling-water side of heat exchangers feeding HPU and lube systems.
- Validated / regulated installations — the included flow calibration certificate (English/Japanese) supports FDA, GMP, ISO 9001, and ISO 13485 documentation requirements without separate calibration steps at install.
- Ethylene glycol coolant systems — rated for glycol/water mixtures up to 3 mPa·s viscosity.
What’s Included
- PF3W711-N10-BT-MRA digital flow switch with integrated temperature sensor
- Lead wire with M8 connector, 3 m (ZS-40-A)
- Mounting bracket with 4 tapping screws M4×10 (ZS-40-M, for PF3W711 body)
- Factory flow-rate calibration certificate (English/Japanese)
Compatible Accessories
- ZS-40-M — replacement bracket with 4 tapping screws M4×10 (PF3W711/511 body)
- ZS-40-A — replacement lead wire with M8 connector (3 m)
Frequently Asked Questions
What is included with the calibration certificate?
The A code at the end of the part number adds a factory calibration certificate for the flow sensor only (not the temperature sensor). The document is written in both English and Japanese and is intended to support audit, qualification, and validated-system documentation requirements. The certificate is unique to the serial number and shipped with the unit.
Does the calibration certificate cover the temperature sensor?
No. SMC’s "A" calibration certificate is only for the flow rate sensor. The temperature sensor is not separately calibrated. If your application requires traceable temperature calibration, plan for a downstream traceable RTD or third-party calibration step.
What does the "B" output code mean?
The B code designates both OUT1 and OUT2 as PNP open-collector switch outputs. OUT1 is driven by flow rate. OUT2 can be user-assigned to drive on either flow rate or fluid temperature, giving you two independent PNP trips from one device. There is no analog output on this variant — for 1–5V analog the corresponding code is "E"; for 4–20 mA it is "F".
What is the difference between PF3W711 and the smaller PF3W704 / PF3W720 / PF3W740?
The number after PF3W7 designates the sensor body size and rated flow range: PF3W704 is 0.5–4 L/min, PF3W720 is 2–16 L/min, PF3W740 is 5–40 L/min, PF3W711 is 10–100 L/min, and PF3W721 is 50–250 L/min. The PF3W711 body is sized for higher-volume cooling and process water mains with 3/4" or 1" ports. Pressure loss on the PF3W711 body is rated at 60 kPa or less at max flow (vs. 45 kPa on the smaller bodies).
What fluids can the PF3W711 measure?
Water and ethylene glycol aqueous solutions with viscosity of 3 mPa·s (3 cP) or less. The standard FKM seal and PPS/SS304/SCS13 wetted parts are suitable for most cooling-water and glycol-cooled circuits. For deionized water and chemical liquids, SMC offers the PF3W-U variants with CPVC piping.
How accurate is the PF3W711-N10-BT-MRA?
Display accuracy is ±3% of full scale, with ±2% F.S. repeatability. Temperature display accuracy is ±2°C. The included calibration certificate documents the as-shipped flow performance traceable to the unit’s serial number. Achieving rated accuracy requires at least 11 cm of straight pipe upstream of the inlet at 100 L/min on this body size.
Which bracket does the PF3W711 use?
The PF3W711 body uses ZS-40-M (with 4 M4×10 tapping screws). Note that this is different from the smaller bracket used on PF3W704/720 (ZS-40-K) and on PF3W740 (ZS-40-L) — the larger PF3W711 housing requires the larger mounting bracket and M4 hardware.
What is the maximum operating pressure?
Rated operating pressure is 0 to 1 MPa (~145 psi) and proof pressure is 1.5 MPa. The pressure rating derates at higher fluid temperatures — refer to the SMC PF3W catalog for the pressure-vs-temperature curve specific to the PF3W711 body.
Can I order a 4–20 mA or 1–5V analog version of this part?
Yes. With the same flow range and bracket/calibration options, the analog variants would be PF3W711-N10-FT-MRA (PNP switch + 4–20 mA analog) or PF3W711-N10-ET-MRA (PNP switch + 1–5V analog). Contact Automation Distribution for configuration assistance or to confirm lead time on these variants.
Need help configuring the right SMC PF3W flow switch?
Automation Distribution is an authorized SMC distributor with engineering support on water flow switches, chillers, and fluid process products. Call 1-888-600-3080 or contact us for application sizing, cross-references, calibration documentation, and stock checks on the full PF3W7 family.
- Type:
- Integrated Display
- Rated Flow Range (Flow Range):
- 10 To 100 L/min
- Flow Adjustment Valve:
- None
- Thread Type:
- NPT
- Port Size:
- 1/1
- Output Specification/Temperature Sensor:
- OUT1 Flow Rate:PNP
- Lead Wire/Option:
- With Lead Wire With M8 Connector (3 m)
- Remote Sensor Unit:
- Instantaneous Flow Rate:L/min
- Bracket:
- Bracket
- Calibration Certificate (Only Flow Sensor):
- With Calibration Certificate
- Made To Order:
- Standard
