The Veris PW2LX03S is the clearest choice for measuring differential pressure in non-corrosive liquid systems, with a listed 0–50 PSID range and wet/wet design. A tank-level transmitter may suit liquid fuel level monitoring, while the smart water model is an option when flexible output choices matter. The remaining listings provide limited information or are described as air-pressure products, so verify their suitability before using them with liquids.
| Product | Best suited for | Key detail |
|---|---|---|
| Veris PW2LX03S | Liquid system differential pressure | Wet/wet, 0–50 PSID |
| Liquid Fuel Tank Level Transmitter | Fuel tank level measurement | Display transmitter listing |
| Smart Water Differential Pressure Transducer | Water monitoring with output flexibility | Multiple output options stated |
| Differential Air Pressure Transmitter | Air pressure applications | Not identified as liquid-compatible |
| Micro Differential Pressure Transmitter | Buyers comparing transmitter models | Model variants listed |
Veris PW2LX03S Wet/Wet Pressure Transducer
Best for: Measuring differential pressure across pumps, filters, heat exchangers, compressors, and other systems using non-corrosive wet media. This is the strongest match in the list for liquid differential pressure because its description specifically identifies a wet/wet transducer and liquid-system applications.
The listed range is 0–50 PSID. Features include a microprocessor-profiled sensor, a two-wire design, an LCD, a NEMA 4 enclosure, and a jumper-selectable output direction: normal 4–20 mA or reverse 20–4 mA. The product description also names pump, chiller/boiler, and chilled- or hot-water system monitoring as applications.
Consideration: The listing specifies non-corrosive wet media. Avoid assuming it is suitable for corrosive liquids or for a pressure range outside 0–50 PSID.
Liquid Fuel Tank Level Differential Pressure Transmitter
Best for: Buyers seeking a differential-pressure product specifically described for liquid fuel tank level measurement. The listing names it a liquid fuel tank level differential pressure sensor and display transmitter, making its stated purpose distinct from general pump or water-system pressure monitoring.
The supplied product information does not provide a measurement range, output type, fuel compatibility details, or other installation specifications. Confirm those details against the tank, liquid, and monitoring system requirements before selecting it.
Consideration: The listing’s brief description leaves important selection details unspecified. It may not be the right choice if you need documented range and signal information upfront.
4–20 mA Smart Water Differential Pressure Transducer
Best for: Buyers considering water pressure monitoring who need to compare signal-output options. The product description presents it as a liquid differential pressure transducer and claims multiple output options, including current and frequency, for different control systems and equipment.
The listing also describes applications in industrial automation, automotive manufacturing, equipment, and laboratory research. However, it does not specify a measurement range or identify the exact available outputs for this particular configuration. Check the product details to ensure its output matches the receiving equipment.
Consideration: The listing makes broad accuracy and stability claims but does not provide numerical specifications in the supplied information. Do not select it based on those claims alone when a defined accuracy or range is required.
Differential Air Pressure Transmitter
Best for: Buyers comparing differential pressure transmitters who may actually need an air-pressure model. The product name explicitly identifies it as a differential air pressure sensor and transmitter, with 4–20 mA and 0–10 V named in the description.
The listing title also includes a 0–30 kPa reference and a -50–50 Pa reference. Because these are different range expressions, confirm the exact configuration before ordering. This product is included for comparison, not as a primary liquid-sensing recommendation.
Consideration: The provided information identifies air pressure, not wet/wet liquid service. Avoid choosing it for liquid measurement unless the seller’s specifications explicitly confirm liquid compatibility.
Micro Differential Pressure Transmitter Series
Best for: Buyers researching a micro differential pressure transmitter when they can verify model-level specifications before purchase. The listing names MS-151, MS-151-LCD, MS-311, MS-311-LCD, MS-321, MS-321-LCD, MS-331, and MS-331-LCD variants.
The supplied features describe it as an industrial pressure transmitter but do not state that it is wet/wet or suitable for liquid service. They also do not provide a range, output, or media compatibility details. Compare the exact model suffix and request or locate its full specification sheet before choosing it for a liquid application.
Consideration: The model list alone does not establish liquid compatibility. This is a less certain option for liquid differential pressure than the Veris unit.
Buying Guide: How To Choose A Liquid Differential Pressure Sensor
Is the sensor designed for liquid contact?
Look for clear wet/wet or liquid-service wording. A differential sensor intended for air may not be appropriate for liquid measurement. Confirm the wetted-media compatibility, especially if the liquid is corrosive or otherwise chemically demanding. The Veris listing explicitly specifies non-corrosive wet media; the air transmitter does not identify liquid service.
What pressure range and output do you need?
Match the sensor’s differential range to the pressure conditions in the installation. A range that does not fit the application can make the device unsuitable. Check signal type as well: the Veris listing specifies selectable normal or reverse 4–20 mA operation, while other listings provide incomplete or configuration-dependent output details.
Is the goal system pressure or tank level?
For pressure drop across equipment such as pumps, filters, or heat exchangers, choose a product described for that use. For liquid fuel tank level, consider the tank-level transmitter, but verify the liquid compatibility and range. Differential-pressure measurement depends on the application’s pressure arrangement, so confirm installation requirements before buying.
What product details should you verify?
- Liquid or wet/wet compatibility and the specific media restrictions.
- Measurement range and units, including the exact model configuration.
- Output signal and whether the receiving controller accepts it.
- Enclosure and display requirements for the installation.
- Whether the product is intended for tank level, equipment pressure drop, or air pressure.
Frequently Asked Questions
What is a liquid differential pressure sensor used for?
It measures the pressure difference between two points in a liquid system. Common listed uses include monitoring pressure across pumps, filters, heat exchangers, and water systems.
Which product here is most clearly specified for liquid service?
The Veris PW2LX03S is described as a wet/wet transducer for non-corrosive wet media and lists liquid-system applications.
Can an air differential pressure sensor measure liquid pressure?
Do not assume so. The air transmitter in this list is identified for air pressure, and its provided details do not establish liquid compatibility.
What does 4–20 mA indicate?
It identifies a current-output signal format. Confirm that the sensor’s output configuration matches the input requirements of the monitoring or control equipment.
What should I check before buying a tank-level transmitter?
Verify its measurement range, supported liquid, output, and installation requirements. The tank-level listing supplied here does not specify those details.