Description
SMC PF3W720S-04-AT-MR Digital Flow Switch for Liquids
SMC Corporation Japan | 2-Color Display Liquid Flow & Temperature Monitoring
This unit is in good pre-owned operational condition, removed from functional automation equipment. The digital screen, body, and port threads show standard cosmetic signs of previous installation (minor surface scratches or scuffs), but the unit is fully operational. Please review all high-resolution listing photographs to verify exact body condition, port threads, and electrical connector style prior to purchase.
Product Overview
The SMC PF3W720S-04-AT-MR Digital Flow Switch is a high-performance industrial liquid flow sensor designed by SMC Corporation (Japan) for precise real-time monitoring of cooling water, fluids, and process liquid lines.
Featuring a vivid dual-color digital display and an integrated temperature sensor, the PF3W7 Series allows simultaneous flow rate and fluid temperature monitoring. Its compact design, configurable switch outputs, and robust construction make it an ideal choice for cooling water loops, semiconductor manufacturing, automated machinery, and industrial fluid control applications.
Technical Specifications
| Specification Parameter | Details |
|---|---|
| Brand / Manufacturer | SMC Corporation (Japan Genuine) |
| Model / Part Number | PF3W720S-04-AT-MR |
| Device Type | 3-Color / 2-Screen Digital Flow Switch for Liquids |
| Applicable Fluid | Water, Ethylene Glycol Solutions, & Industrial Process Liquids |
| Port Connection Size | 1/2″ (04 Connection Code) |
| Integrated Functions | Flow Measurement + Integrated Temperature Sensor (-AT) |
| Display Type | Dual-Screen 3-Color LED (Red / Green / Yellow Output Indication) |
| Primary Application | Cooling Lines, Chiller Monitoring, Liquid Flow & Temp Threshold Control |
Key Features
- Dual-Parameter Monitoring: Measures both instant liquid flow rate and fluid temperature in a single compact sensor body.
- Clear Digital Display: Large 2-screen, 3-color display provides immediate visual feedback of flow status and alarm states from a distance.
- Space-Saving Compact Design: Easily installs into tight piping manifolds and machinery frames with minimal straight piping requirements.
- Genuine SMC Reliability: Engineered in Japan to withstand harsh factory automation conditions, vibration, and continuous industrial operation.
Please note that international import duties, taxes, customs clearance fees, and VAT are not included in the item price or shipping charges. These charges are the sole responsibility of the buyer. Please check with your country’s customs office to determine what these additional costs will be prior to purchasing.
Fast Express Delivery & Secure Packaging
Worldwide Fast Express Shipping (5 to 10 Days): We ship internationally using top-tier courier services (DHL / FedEx / UPS Express) to deliver your order safely within 5 to 10 business days.

