Winsen designs and manufactures industrial and OEM pressure transducers for gases and liquids. Our portfolio covers gauge, absolute, and differential types with analog (4–20 mA, 0–10 V, 0.5–4.5 V) and digital (I²C/SPI) outputs, wide ranges from micro-pressure to 100 MPa, and robust stainless-steel construction for long service life.
- ±0.25%FS typical accuracy
- –40 to 125 °C operating temp options
- IP65–IP67 environmental protection
- Gauge / Absolute / Diff. measurement modes
Overview & Working Principle
A pressure transducer converts fluid pressure into an electrical signal. Winsen integrates a stable sensing element (piezoresistive, capacitive, or piezoelectric), temperature compensation, and signal conditioning to deliver linear, low-noise outputs that are easy to read in PLCs, microcontrollers, or data acquisition systems.
Choose gauge for pressure relative to ambient, absolute for pressure relative to vacuum, and differential for the difference between two ports. For long cable runs and industrial noise environments, 4–20 mA is preferred; for low-power or MCU designs, ratiometric or digital outputs are ideal.
Pressure Sensor and Transmitter Comparison Overview
| Category | Model | Power Supply / Output | Detection Range | Accuracy / Nonlinearity | Pressure Reference | Operating Temperature | Shell Material | Remarks |
| Diffused Silicon Pressure Sensor | WPAK70 | 1.5mA / mV | -100kPa ~ 0 ~ 10kPa…10MPa | ≤±0.3%FS | Gauge / Absolute / Sealed Gauge | -40℃ ~ 120℃ | – | High versatility, compact design |
| WPAK69 | 1.5mA / mV | -100kPa ~ 0 ~ 10kPa…10MPa | ≤±0.3%FS | Gauge / Absolute / Sealed Gauge | -40℃ ~ 120℃ | – | Similar to WPAK70 | |
| WPAK68 | 1.5mA / mV | -100kPa ~ 0 ~ 10kPa…100MPa | ≤±0.3%FS | Gauge / Absolute / Sealed Gauge | -40℃ ~ 120℃ | – | Extended range version | |
| WPAK67 | 1.5mA / mV | 0 ~ 10kPa…2.5MPa | ≤±0.3%FS | Differential Pressure | -40℃ ~ 120℃ | – | For differential applications | |
| WPAK66 | 1.5mA or 10V / mV | 6MPa…60MPa | ≤±0.3%FS | Sealed Gauge | -40℃ ~ 120℃ | – | Sealed design for higher ranges | |
| WPAK65 | 1.5mA or 10V / mV | -100kPa ~ 0 ~ 10kPa…16MPa | ≤±0.3%FS | Gauge / Absolute / Sealed Gauge | -40℃ ~ 120℃ | – | General-purpose sensor | |
| WPAK64 | 1.5mA or 10V / mV | -100kPa ~ 0 ~ 10kPa…25MPa | ≤±0.3%FS | Gauge / Absolute / Sealed Gauge | -40℃ ~ 120℃ | – | Moderate range coverage | |
| WPAK63J | 1.5mA / mV | -100kPa ~ 0 ~ 10kPa…100MPa | ≤±0.3%FS | Gauge / Absolute / Sealed Gauge | -40℃ ~ 120℃ | – | J-type version for special mounting | |
| WPAK63 | 1.5mA or 10V / mV | -100kPa ~ 0 ~ 10kPa…100MPa | ≤±0.3%FS | Gauge / Absolute / Sealed Gauge | -40℃ ~ 120℃ | – | Versatile with wide range | |
| Ceramic Pressure Sensor | WPAH01 | 2–20V / mV | 0 ~ 200kPa…40MPa | ≤±0.3%FS | – | -40℃ ~ 125℃ | – | High chemical resistance |
| Plastic Sealed Pressure Sensor | WPAS12 | Digital and analog | 15–115kPa | – | – | -40℃ ~ 125℃ | – | Cost-effective, compact |
| WPAS02 | Digital and analog | 10kPa ~ 100kPa | – | – | -20℃ ~ 80℃ | – | Basic sensor for air/gas | |
| WPAS01 | Digital and analog | 10kPa ~ 100kPa | – | – | -40℃ ~ 125℃ | – | Robust high-temp tolerance | |
| Diffused Silicon Pressure Transmitter | WPCK81 | 4–20mA, RS485 | 0 ~ 1m…200mH₂O | ±0.5%FS / ±1%FS | Gauge Pressure | – | Stainless steel | For deep-level and tank level measurements |
| WPCK62 | 4–20mA (Optional) | 0 ~ 35kPa…25MPa | ±0.5%FS | Gauge / Absolute / Sealed Gauge | – | Stainless steel | Widely compatible, thread options | |
| WPCK08 | 4–20mA, RS485 | 0 ~ 200mH₂O | ±0.5%FS | Gauge Pressure | – | Stainless steel | Explosion-proof version | |
| WPCK07 | 4–20mA, 0.5–4.5V, 0–5V, 1–5V, 0–10V, 1–10V | -100kPa ~ 0 ~ 10kPa…100MPa | ±0.5%FS | Gauge / Absolute / Sealed Gauge | – | Stainless steel | Full-range output types | |
| WPCK05 | 0.5–4.5V, 0–5V, 1–5V, 0–10V, 1–10V | -100kPa ~ 0 ~ 10kPa…100MPa | ±0.5%FS | Gauge / Absolute / Sealed Gauge | – | Stainless steel | Voltage output options | |
| WPCK03 | I²C, 4–20mA, 0.5–4.5V and more | -100kPa ~ 0 ~ 10kPa…100MPa | ±0.2%FS, ±0.5%FS (custom) | Gauge / Absolute / Sealed Gauge | – | Stainless steel | Flexible signal types, high accuracy | |
| Ceramic Pressure Transmitter | WPCH04 | 0.5–4.5V (Customizable) | 0.2MPa…40MPa | 0.1%FS (Default) | – | – | Stainless steel | High precision ceramic core |
| WPCH01 | 4–20mA, 0/1–5/10V, 0.5–4.5V | 0.2–5MPa | 0.1% ~ 5.0%FS (Default 2.0%) | – | – | Stainless steel | Customizable, versatile outputs | |
| WPBH01 | Proportional voltage (0.5–4.5V) | 2–400 bar (Customizable) | 0.5%, 1%, 2% (Default), 3% | – | – | Stainless steel | Broad pressure range | |
| Glass Micro-Fusing Transmitter | WPCK89 | Digital and analog | 0 ~ 100 / 150 / 250 / 500 psig | ±1%FS | – | – | Stainless steel | Extremely robust and thermally stable |
Selection Guide
Use this quick matrix to choose the right transducer for your program. Our engineers can finalize the stack-up and calibration once your operating conditions are known.
| Use Case | Recommended Type | Typical Range | Preferred Output | Wetted Materials | Process Connection |
|---|---|---|---|---|---|
| Hydraulics / presses | Gauge / High-pressure | 10–100 MPa | 4–20 mA or 0–10 V | SS 316L, mineral oil fill | G1/4, 1/4-NPT, M14×1.5 |
| Air compressors | Gauge | 0–1.6 / 2.5 / 4 / 10 MPa | 4–20 mA | SS 304/316L | G1/4, 1/4-NPT |
| Vacuum systems | Absolute | 0–100 / 200 / 300 kPa abs | 0.5–4.5 V or I²C | SS 316L | G1/4, KF adapter |
| Clean room / filters | Differential (low-range) | ±250 Pa to ±5 kPa | 0–10 V or 4–20 mA | SS + polymer ports | Barbed 4–6 mm |
| Water & process liquids | Gauge / Absolute | 0–600 kPa to 4 MPa | 4–20 mA | SS 316L, oil-isolated | G1/4, 1/2-NPT |
Applications & Industries
Industrial & Manufacturing
Hydraulic presses, pneumatic lines, compressors, pumps, and test benches rely on stable transducers for control and safety interlocks.
Automotive & Off-Highway
Fuel, oil, brake, and hydraulic circuits demand shock-resistant, high-temperature designs and robust connectors.
HVAC & Clean Environments
Differential transducers monitor filters, ducts, and room pressurization in clean rooms and hospitals.
Energy & Utilities
Boilers, chillers, and gas distribution benefit from reliable feedback for PID control and alarming.
Water & Process
Water treatment skids, dosing systems, CIP loops, and process lines require corrosion-resistant wetted materials and IP-rated connectors.
Lab & Instruments
Benchtop analyzers and portable devices often use low-power absolute or differential transducers with digital outputs.
Why Global Clients Choose Us?
The company consistently adheres to the quality policy of “Fine Craftsmanship, Scientific Innovation, Pursuit of Excellence, and Value-Added Service.” By formulating production process control plans and work instructions, it has established a standardized, accountable, and regulated process management system. Additionally, the company has independently developed an MES production management system, enabling comprehensive and visual management across the entire workflow.
30+ YEARS OF EXPERIENCE
R&D, manufacture and sales of sensors and sensing solutions.
QUALITY GUARANTEE CONTINOUS IMPROVEMENT
Complete and rigid process flow control, coupled with significant improvements.
INTERNATIONAL MARKET
Deliver sensing products to more than 100 countries and regions.
STABLE SUPPLY CHAIN RELIABLE PRODUCTION
Core components not subject to constraints, advanced equipments for manufaturing and test.
R&D STRENGTH TECHNOLOGY INNOVATION
200+ patents, 180+ R&D team members, self-built labs for continous innovation.
ONE-STOP SERVICE
Professional consultation, fast delivery, 24 hours after-sales support.
Leading the Industry, Innovative & Controllable Technology
With robust R&D capabilities, we maintain sustained input in R&D and unwavering commitment to technological innovation. This not only ensures that we remain at the forefront of industry but also drives continuous innovation, leading the future trend of the sensing industry.
Integration & Wiring
For 4–20 mA (2-wire) loops, power with 12–36 VDC and maintain loop impedance within transmitter compliance. For 0–10 V outputs, a 12–36 VDC supply and high-impedance input (>10 kΩ) are recommended. Ratiometric 0.5–4.5 V devices should use low-noise 5 V and short sensor leads. I²C/SPI variants share digital ground with the host and need proper pull-ups and cable shielding.
Example: 4–20 mA loop
+24V ───── PLC 24V
│
├─────( + ) Pressure Transducer ( – )───── PLC AI (4–20 mA )
│
GND ───┴───────────────────────────────────────── PLC GND
Exact pinout varies by connector family (M12, DIN 43650, Packard, etc.). Refer to the product datasheet.
Quality, Compliance & Reliability
Every transducer is built under a controlled process with 100% functional testing and calibration across temperature points according to the final specification. Traceability and serialized labels support your field service and warranty programs.
- Final calibration with NIST-traceable standards
- Thermal compensation and burn-in strategies tailored to range
- Ingress protection up to IP67 with molded cable or M12 connectors
- Documentation: datasheet, test report, and compliance declaration for standard builds
If your project requires special compliance (e.g., food-contact, oxygen service preparation, or specific EMC standards), let us know. We can evaluate feasibility or provide a compatible transmitter solution.
Ordering & Bulk Purchasing
How to Specify
- Measurement type: Gauge / Absolute / Differential
- Range & units: e.g., 0–16 bar, ±2 kPa, 0–300 kPa abs
- Output: 4–20 mA, 0–10 V, 0.5–4.5 V, I²C/SPI
- Process connection: G1/4, 1/4-NPT, etc.
- Electrical interface: M12, DIN, Packard, cable length
- Environment: temperature span, IP level, shock/vibration
Program Terms
- Samples available for DFM and validation
- Tiered pricing for volume schedules
- Flexible packaging and labeling for your line
- Rolling forecasts and safety-stock support
Pressure Transducer vs. Transmitter vs. Switch
| Device | Primary Output | Use Case | Pros | Considerations |
|---|---|---|---|---|
| Pressure Transducer | Analog (mA/V) or digital (I²C/SPI) | Closed-loop control, measurement, logging | Continuous signal, high resolution | Requires analog/digital input; proper wiring |
| Pressure Transmitter | Conditioned output, industrial housing | Field installation, long cable runs | Ruggedized, standardized connectors | Larger form factor; cost vs. bare transducer |
| Pressure Switch | On/Off (relay or transistor) | Alarms, interlocks, simple control | Simple, no analog input needed | No continuous measurement |
If you’re migrating from switches to transducers for better control, our team can help tune ranges and filters to stabilize your PID loops.
Frequently Asked Questions (FAQ)
How do I choose gauge vs. absolute vs. differential?
Pick gauge for line pressure relative to ambient (compressors, hydraulics). Use absolute for vacuum or barometric-sensitive measurements. Choose differential for measuring across filters, orifices, or rooms.
Can you match my connector and pinout exactly?
Yes. We support M12, DIN 43650, Packard, Deutsch, JST, and custom harnesses with pinouts to your standard, including color coding and labels.
What environmental protection levels are available?
Typical builds achieve IP65–IP67 depending on connector and cable sealing. We advise IP67 for wash-down and outdoor use.
Do you provide calibration certificates?
We offer factory test reports for each unit and can provide calibration certificates referenced to traceable standards as part of your PPAP or documentation pack.
Can you help me replace an obsolete model from another brand?
Yes. Share the part number, electrical output, thread, and range. We will propose a compatible form-fit-function replacement or adapter kit.
More Refrigerant Sensors Knowledge
Pressure Units: The Complete Guide (with Conversion Tables & Sensor Tips)
Learn the most common pressure units (Pa, kPa, MPa, bar, mbar, psi, atm, Torr/mmHg, inHg, inH₂O), when to use each one, and how to convert accurately using formulas, examples, and quick conversion tables—plus tips for specifying pressure sensors.
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