| Model: | WPAH31 |
| Detection principle: | Piezoresistive |
| Characteristics: | Ceramic Sensing Diaphragm, Laser Trimming Technology |
| Standard encapsulation: | Φ18mm × 6.35mm |
| Pressure Range: | 2bar, 5bar, 10bar, 20bar, 40bar, 50bar, 100bar (optional) |
| Working Temperature: | -40℃–125℃ |
| Diaphragm material: | Ceramic |
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Description
The WPAH31 is a high-performance ceramic piezoresistive pressure sensor constructed from a premium ceramic base using thick-film technology, integrated with temperature compensation. Measuring Φ18mm×6.35mm, its ceramic structure offers inherent advantages: high elasticity, corrosion resistance, wear resistance, and immunity to impact/vibration. The ceramic’s thermal stability and high-temperature sintering process enable operation across -40～125℃, while its creep resistance ensures long-term stability. This makes it ideal for refrigeration, chemical, and environmental applications where corrosion resistance is critical.
Application
- Industrial Process Control: Monitors pressure in hydraulic/pneumatic systems, servo valves, and manufacturing equipment.
- Environmental & Chemical Sectors: Withstands corrosive media in chemical production, wastewater treatment, and gas sensing.
- Medical & Biomedical Devices: Used in diagnostic instruments and fluid pressure monitoring systems requiring biocompatibility.
- Aerospace & Automotive: Suitable for high-temperature/high-vibration environments like engine pressure sensing.
Features
- Ceramic Sensing Diaphragm: Offers high overload capacity (2x rated range) and long-term reliability.
- Laser Trimming Technology: Corrects zero point and temperature drift for precision measurements.
- Corrosion & Wear Resistance: Ceramic material resists chemical erosion, making it suitable for aggressive media.
- Wide Temperature Operation: Maintains accuracy across -40～125℃ with minimal thermal drift.
Specifications
| Parameter | Details |
|---|---|
| Dimensions | Φ18mm × 6.35mm |
| Pressure Range | 2bar, 5bar, 10bar, 20bar, 40bar, 50bar, 100bar (optional) |
| Operating Voltage | 2–20V DC |
| Sensitivity | 1.5–4mV/V (typical: 2.5±1.0mV/V) |
| Input/Output Impedance | 10KΩ±30% |
| Temperature Range | -40℃–125℃ |
| Zero Point Output | 0–±0.4mV/V (typical: 0±0.25mV/V) |
| Linearity/Hysteresis/Repeatability | Typical ±0.3%FS |
| Temperature Drift | ±0.02%FS/℃, ±0.03%FS/℃, ±0.05%FS/℃ (optional) |
| Safe Overload | 2x rated range (at typical sensitivity) |
| Long-Term Stability | ≤±0.5%FS/year (under proper use) |
* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.
Technical Support:
Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.
The sensors don't have sleeping mode. It can be set in program if needed.
All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.
The sensor has been fully tested (not calibrated) before leaving the factory, but the module will be calibrated before leaving the factory.
However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.
15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.
Our sensors are certified with CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.
Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.
Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to sales@winsensor.com
Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.
