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High Accuracy Silicone Oil-Filled IoT Sensor

WNK811 is a series of high performance compact pressure transducer, by using ASIC signal conditioning chip and dry ceramic capacitive pressure sensor. It has features of anti-corrosion, anti-wear, shock resistance and vibration resistance. Its anti-overload capacity is up to 10 times of the range, completely solved poor overload in small range of other sensors. In addtion to general ranges of normal sensors, its most outstanding characteristic is the positive and negative gauge pressure function. With high output and wide range, WNK80MA is especially suitable for manufacturing of high-performance industrial control pressure transmitter and harsh environment pressure measurement.

Availability:
Quantity:
  • WNK811

  • WNK


ressure Type

Gauge Pressure , Absolute Pressure, Sealing Pressure

Pressure  Range

-1 - 60Mpa

Accuracy

0.5%FS

Power Supply

5VDC,  12-32VDC

Measuring Media

Gas, Steam, Liquid, Oil

Output

Analog

 4-20mA,  0.5-4.5V, Other

Digital

 I2C,

Operation Condition and Temperature

Compensation Temperature

 -40...75℃

Medium Temperature

 -45 ... 85℃ 

Storage Temperature

 -45 ... 85℃ 

Material and Protection

Ingress Protection

IP65

Housing Material

304SS, 316L


Product Overview


The WNK811 is a high-performance compact pressure transducer designed for IoT applications, engineered by WNK—a leading China-based manufacturer with over 20 years of expertise in pressure measurement technology. This sensor integrates an ASIC signal conditioning chip and a dry ceramic capacitive pressure sensor, delivering exceptional reliability in diverse operating environments.



What sets the WNK811 apart is its robust design, featuring anti-corrosion, anti-wear, shock resistance, and vibration resistance properties—making it ideal for harsh industrial settings. A standout feature is its impressive anti-overload capacity, reaching 10 times the measuring range, which addresses the common issue of poor overload performance in small-range sensors. Additionally, it offers unique positive and negative gauge pressure functionality, complementing its wide measuring range. With high output stability and versatility, the WNK811 is a top choice for high-performance industrial control systems and demanding pressure measurement tasks.


Features


Pressure Performance


The WNK811 supports multiple pressure types, including gauge pressure, absolute pressure, and sealing pressure, ensuring adaptability to varied measurement needs. Its pressure range spans -1 to 60Mpa, covering both low and high-pressure scenarios. With an accuracy of 0.5%FS, it guarantees precise data collection, critical for applications requiring tight control.


Power and Output


Flexible power supply options include 5VDC and 12-32VDC, allowing seamless integration into different electrical systems. For output, it offers both analog (4-20mA, 0.5-4.5V, and custom options) and digital (I2C) signals, ensuring compatibility with IoT platforms, industrial controllers, and monitoring systems.


Temperature Tolerance


The sensor performs reliably across extreme temperatures: its compensation temperature range is -40...75℃, while the medium temperature it can handle ranges from -45...85℃, and storage temperature spans -45...85℃. This wide temperature tolerance makes it suitable for outdoor, automotive, and refrigeration environments.


Durability and Protection


With an ingress protection rating of IP65, the WNK811 is dust-tight and resistant to low-pressure water jets, enhancing its longevity in wet or dusty conditions. The housing is crafted from 304SS or 316L stainless steel, materials known for their corrosion resistance—perfect for contact with aggressive media like chemicals or saltwater.


Applications


· Automotive, Compressor, and Refrigeration Industry: Its vibration resistance and wide temperature range ensure stable performance in engine bays, compressor units, and refrigeration systems, where pressure fluctuations and temperature shifts are common.

· Engineering Machinery: Heavy-duty equipment like excavators and cranes benefit from its anti-overload capacity, withstanding sudden pressure spikes during operation.

· Pressure Control and Monitoring: Used in industrial pipelines and manufacturing lines to maintain optimal pressure levels, preventing leaks or system failures.

· Water Treatment Systems: The corrosion-resistant 316L housing and IP65 protection make it ideal for monitoring water pressure in treatment plants, where exposure to chemicals and moisture is frequent.

· Hydraulic and Pneumatics: Its high accuracy ensures precise control of hydraulic fluids and compressed air in machinery, improving operational efficiency.

· HVAC and BAS Control: Integrates with building automation systems to regulate air and water pressure in heating, ventilation, and air conditioning setups, optimizing energy use.

· Factory Automation and Fluid Control: Supports real-time pressure data transmission, enabling smart decision-making in automated production lines.


FAQ


Q: Are you a trading company or a manufacturer?
A: We are a manufacturer with over 20 years of experience, founded in 2004. We specialize in producing high-accuracy, long-term stable, and cost-efficient pressure, level, and temperature measuring instruments.



Q: What quality control measures do you implement?
A: Our factory is certified under ISO 9001-2015. Every WNK811 sensor undergoes strict temperature compensation and a 48-hour aging test before shipment, ensuring consistent performance and reliability.

 

Electrical Connections

High Accuracy Silicone Oil-Filled IoT Sensor


High Accuracy Silicone Oil-Filled IoT Sensor


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