The FESTO 8036871 SFAW-32-TG12-E-PNLK-PNVBA-M12 is an industrial flow sensor for liquid media designed for applications that require continuous monitoring of flow rate and temperature in piping systems. It belongs to the SFAW series, which FESTO positions for measuring and monitoring the flow, consumption, and temperature of liquids in industrial systems. For this specific model, FESTO’s official data identifies a flow measuring range from 1.8 to 32 l/min, a G1/2 female fluid connection, an M12x1 A-coded 5-pin electrical connection, and a product weight of 400 g.
In practical automation and process equipment, a liquid flow sensor is more than a measuring device. It is a control-side component that helps engineers verify process stability, detect abnormal consumption, identify line blockage or leakage tendencies, and maintain repeatable operating conditions. The SFAW family uses the vortex measuring principle for flow detection, and FESTO also specifies PT1000 for temperature measurement in the datasheet for this model. This combination makes the product useful wherever both media movement and process condition need to be observed at the same measuring point.
Product Overview
| Item | Description |
|---|---|
| Brand | FESTO |
| Part Number | 8036871 |
| Model | SFAW-32-TG12-E-PNLK-PNVBA-M12 |
| Product Type | Flow sensor |
| Series | SFAW |
| Measuring Variables | Flow, temperature |
| Measuring Principle | Vortex for flow, PT1000 for temperature |
| Flow Measuring Range | 1.8 to 32 l/min |
| Operating Pressure | 0 to 12 bar |
| Overload Pressure | 40 bar |
| Medium | Liquid, water, neutral fluids |
| Fluid Connection | Female thread G1/2 |
| Electrical Connection | M12x1, A-coded, 5-pin |
| Operating Voltage | 18 to 30 V DC |
| Outputs | PNP/NPN switching plus analog/IO-Link configuration family features |
| Degree of Protection | IP65 |
| Product Net Weight | 400 g |
The main values above are taken from FESTO’s product page and official datasheet for part number 8036871.
Product Positioning and Functional Role
The SFAW-32-TG12-E-PNLK-PNVBA-M12 is intended for liquid media monitoring, not for compressed air duty. That is an important distinction because many industrial sensing products outwardly resemble each other, yet the measuring principle, wetted materials, pressure rating, and application environment are completely different. FESTO states that the SFAW line is designed for liquids in piping systems or terminals in industry, and this model is specifically configured for unidirectional flow from P1 to P2. In real use, that makes it suitable for water circuits, cooling loops, utility lines, and machine subsystems where stable flow confirmation matters.
The measurement concept is also technically relevant. According to FESTO, the SFAW uses the vortex principle to record flow velocity, from which flow rate and accumulated volume are calculated. This method is widely valued in industrial liquid sensing because it offers a good balance of accuracy, mechanical robustness, and service life for clean or moderately demanding process media. FESTO’s series documentation also notes that the sensor is intended to monitor flow, volume, and temperature, which means the product supports both direct process measurement and system-level condition observation.
Technical Characteristics
| Technical Feature | Practical Meaning |
|---|---|
| 1.8 to 32 l/min measuring range | Suitable for low-to-medium liquid flow applications |
| Vortex measuring principle | Stable industrial measurement method for liquid flow |
| Temperature measurement included | Adds process visibility beyond flow only |
| G1/2 female thread | Common mechanical connection size |
| 18 to 30 V DC supply | Standard industrial control voltage |
| M12 A-coded 5-pin connector | Convenient field wiring and replacement |
| IP65 protection | Appropriate for industrial environments |
| 0 to 12 bar operating pressure | Suitable for many machine-side liquid circuits |
| 40 bar overload pressure | Safety margin against pressure peaks |
| 400 g weight | Robust compact sensor for fixed installation |
These values are supported by the official FESTO datasheet and the SFAW family documentation.
Weight and Mechanical Integration
The product weight is 400 g. That figure matters in engineering work because it affects mounting load, vibration behavior, bracket strength, and installation planning. A 400 g sensor is still compact enough for direct pipe-adjacent installation, but it is substantial enough to indicate a more robust industrial housing rather than an ultra-light miniature detector. For machine builders and maintenance teams, this usually means the device is well suited for fixed mounting in skids, utility panels, cooling assemblies, and equipment frames where durability is more important than extreme miniaturization.
The fluid connection on this version is female thread G1/2, and FESTO identifies the sensor as a unit that can be mounted in any position. That increases installation flexibility, especially in retrofit situations where piping layout is already fixed and the sensor must fit around existing valves, tees, or hose assemblies. The same datasheet also lists a PA-reinforced housing and media-contact materials including EPDM, ETFE, stainless steel, and reinforced PA6T/6I, which are important clues that the product is intended for real industrial liquid-service conditions rather than light-duty consumer use.
Electrical and Signal Integration
This model operates on 18 to 30 V DC, which fits standard industrial automation architecture. That makes it straightforward to integrate into PLC systems, remote I/O blocks, machine controllers, and condition-monitoring platforms already designed around 24 V DC supply logic. FESTO’s datasheet excerpt for this part also confirms reverse polarity protection and an M12x1 A-coded connector, both of which are important in field installation because they reduce wiring risk and simplify replacement in service conditions.
The naming structure and datasheet information also indicate that this version belongs to the configurable SFAW family with switching, analog, and IO-Link-oriented functionality. FESTO’s family documentation describes SFAW variants as supporting measurement and monitoring tasks with process data such as flow, temperature, and accumulated volume, while the current official data for this part references IO-Link characteristics and process data structure. For industrial users, that means the sensor is not limited to local indication; it can be part of a larger digital diagnostics and control framework.
Typical Applications
| Application Area | Why This Sensor Fits |
|---|---|
| Cooling water circuits | Verifies actual liquid movement and temperature behavior |
| Machine tool utility lines | Helps detect insufficient flow before faults escalate |
| Process skids | Supports monitoring of neutral liquid media |
| Industrial washing or circulation systems | Combines flow and temperature supervision |
| General automation equipment | Standard DC supply and M12 wiring simplify control integration |
These use cases are inferred from FESTO’s official description of the SFAW series as a sensor for liquid media in industrial piping systems, together with the published range, pressure, and connection data for the specific model.
Why This Model Has Practical Value
One of the main strengths of the SFAW-32-TG12-E-PNLK-PNVBA-M12 is that it combines flow monitoring and temperature sensing in one compact device. In many industrial systems, a flow value alone does not tell the full story. A line can still show movement while the thermal condition drifts outside the acceptable range. By measuring both variables, the sensor allows a controller or maintenance technician to make a more useful judgment about actual process condition. That can reduce troubleshooting time and improve preventive maintenance decisions.
Another practical advantage is its pressure capability. FESTO lists an operating pressure up to 12 bar and overload pressure up to 40 bar, which gives the product a reasonable industrial margin for many machine-side liquid circuits. Combined with IP65 protection, this supports use in equipment environments where splash exposure, plant dust, and general industrial handling are normal. This does not make the sensor universal for every fluid system, but it does position it well for standard industrial water and neutral-liquid monitoring tasks.
Procurement and Replacement Perspective
For buyers and spare-parts teams, the critical identification points are the complete model string and the part number: 8036871 / SFAW-32-TG12-E-PNLK-PNVBA-M12. FESTO’s online product page confirms this exact pairing, and the official datasheet provides the rest of the selection-critical data such as 1.8 to 32 l/min range, G1/2 connection, 18 to 30 V DC, M12 electrical interface, and 400 g weight. In industrial procurement, that full combination matters because selecting only by appearance or only by a partial family code can easily result in the wrong port type, wrong output version, or wrong measuring range.
Conclusion
The FESTO 8036871 SFAW-32-TG12-E-PNLK-PNVBA-M12 is a compact industrial liquid flow sensor built for monitoring flow and temperature in piping systems. Its published specifications include a 1.8 to 32 l/min measuring range, G1/2 female thread connection, 18 to 30 V DC operating voltage, M12x1 A-coded 5-pin connector, IP65 protection, and a product weight of 400 g. With its vortex-based measuring principle, temperature-sensing capability, and industrial connection format, it is well suited for equipment builders, maintenance teams, and industrial buyers who need dependable monitoring of water or neutral-liquid circuits in automation systems.
