Barometric Pressure Sensor
Build accurate weather, altitude and environmental compensation features with Winsen absolute-pressure sensors. We offer board-level sensors and industrial transmitters tailored for the 300–1100 hPa span, with options for ratiometric, 0–10 V and 4–20 mA outputs.
OEM/ODM • Private labeling • Fast lead time
- 300–1100 hPa barometric span
- Absolute vacuum reference
- 0.5–4.5 V / 0–10 V / 4–20 mA easy integration
- −40 to 85/105 °C wide operating temp (model-dep.)
Overview & Working Principle
A digital hydraulic gauge uses an electronic pressure transducer/transmitter to convert fluid pressure into an electrical signal and a display value. Compared with mechanical gauges, it offers better accuracy, shock resistance, remote monitoring, and alarm capability. It also supports data logging and predictive maintenance.
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 Case | Span / Range | Recommended Model | Preferred Output | Notes |
|---|---|---|---|---|
| Weather station barometer | 300–1100 hPa | WPAS01 / WPAK64 core | 0.5–4.5 V (ratiometric) | Low noise; temperature compensation for outdoor use. |
| UAV/Altimeter | 300–1100 hPa | WPAS01 (board-level) | 0.5–4.5 V | Implement digital filtering to reduce vibration artifacts. |
| HVAC & lab reference | 80–120 kPa | WPCK62 (absolute) | 0–10 V / 4–20 mA | Long cables to PLC/DAQ; shielded wiring recommended. |
| Gas sensor barometric compensation | 80–120 kPa | WPAK64 / WPAS01 | 0.5–4.5 V | Feed absolute pressure into concentration algorithms. |
Need a panel display or RS-485/Modbus? We can supply a compact transmitter package with indicator and relays on request.
Key Specifications
| Measurement Type | Absolute (barometric) |
|---|---|
| Typical Ranges | 300–1100 hPa; 80–120 kPa |
| Outputs | 0.5–4.5 V ratiometric (board-level); 0–10 V or 4–20 mA (transmitters) |
| Operating Temp. | −40 to 85/105 °C (model-dependent) |
| Response Time | ≤1–4 ms (per model) |
| Media | Dry, non-corrosive gases (air) for barometric use |
| Electrical | Pins (board-level) or M12/DIN/pigtail (transmitters) |
| Compensation | Factory temperature compensation; multi-point options on request |
Applications & Industries
Weather Stations
High-stability barometric trend logging and storm detection; combine with temperature and humidity sensors.
Altimeters & UAV
Altitude estimation and vertical-speed hints with digital filtering to suppress vibration and prop wash.
Environmental Instruments
Absolute pressure input for gas concentration normalization and lab experiments.
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
Board-level (0.5–4.5 V): Stable 5 V supply, low-noise layout, short leads to ADC. Average samples for smoother altitude readouts.
Transmitter (0–10 V / 4–20 mA): 12–36 V supply; long-distance wiring to PLC/DAQ. Use shielded cable and ground shield at one end.
Ordering & Bulk Purchasing
How to Specify
- Span & units (e.g., 300–1100 hPa / 80–120 kPa)
- Output (0.5–4.5 V, 0–10 V, 4–20 mA)
- Electrical interface (pins, M12, DIN, pigtail)
- Operating temperature & enclosure needs
- Calibration & documentation (test report/certificate)
Program Terms
- Samples for validation
- Tiered pricing for volume schedules
- Private labeling and custom packaging
- Rolling forecasts & safety stock options
Differential Pressure Sensor vs Transducer vs Transmitter
| Device | Output | Typical Use | Pros | Considerations |
|---|---|---|---|---|
| ΔP Sensor (board/compact) | Ratiometric / I²C / SPI | Embedded devices, instruments | Small, low-power, cost-effective | Requires host electronics and enclosure |
| ΔP Transducer | 0–10 V / 4–20 mA | PLC/DAQ measurement | Simple wiring, long cable runs | External display/relays not included |
| ΔP Transmitter | Conditioned + enclosure (often display/relays) | Field installation, panel mount | Rugged, installer-friendly | Largest size and highest cost |
Not sure which to choose? Share your controller model and mounting location—we’ll recommend the right package.
Frequently Asked Questions (FAQ)
How do I convert barometric pressure to altitude?
Use the international barometric formula with a reference sea-level pressure (QNH). Many controllers provide built-in functions; for best stability, average the pressure signal.
Absolute vs differential: when should I choose each?
Barometric/altitude needs absolute pressure (vacuum reference). Differential sensors are for pressure differences (e.g., across filters or rooms).
Can transmitters sit outdoors?
Use enclosures with vents for barometric equalization, plus hydrophobic membranes. Follow IP and condensation guidelines.
