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T: +86-18156545248
E: info@wnksensor.com
E: info@wnksensor.com
5F, Bldg. 2A, Mingzhu Industrial Park Hefei 230000, China
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WNK55
WNK
The WNK81 4-20mA HART High-Accuracy Transmitter stands as a flagship product in WNK’s pressure transmitter lineup, engineered to deliver reliable performance in demanding industrial environments. Designed to bridge physical signal conversion and digital precision, this transmitter converts pressure, differential pressure, and level signals from liquids and gases into standardized 4-20mA analog output while supporting the HART communication protocol—a critical feature for seamless integration with modern industrial control systems.
Built with advanced digital processing circuits and high-sensitivity sensing cells, the WNK81 ensures consistent accuracy across diverse operating conditions, making it a preferred choice for industries where measurement reliability directly impacts operational efficiency and safety. Its robust design balances technical sophistication with user-friendly functionality, catering to both seasoned engineers and facility managers seeking low-maintenance monitoring solutions.
At the core of the WNK81 is its 0.1% full-scale accuracy (typical), outperforming many standard transmitters in its class. This level of precision ensures that even minute pressure or level changes in liquids and gases are captured with minimal error, critical for applications like leak detection in pipelines or precise level control in chemical tanks. The digital signal processing (DSP) unit further enhances stability, reducing drift to less than 0.01% per year—a testament to its long-term reliability.
The transmitter supports dual output modes: the industry-standard 4-20mA analog signal for straightforward integration with legacy systems, and the HART protocol for two-way digital communication. This duality allows users to not only receive real-time measurement data but also remotely configure settings, perform diagnostics, or adjust calibration—eliminating the need for on-site interventions and reducing downtime.
Housed in 316L stainless steel, the WNK81 resists corrosion from aggressive liquids (e.g., acids, alkalis) and gases (e.g., chlorine, methane), making it suitable for harsh environments. It operates efficiently across a wide temperature range of -40°C to 85°C and can withstand pressure spikes up to 5x its rated range, ensuring longevity in unpredictable industrial settings. Additionally, its compact form factor and multiple process connection options (e.g., G1/2, NPT 1/4) simplify installation in tight spaces.
The WNK81 meets global industry standards, including ATEX and IECEx certifications for explosive environments, making it safe for use in oil refineries, chemical plants, and gas processing facilities. It also complies with RoHS directives, aligning with eco-friendly operational practices.
In manufacturing and processing plants, the WNK81 monitors pressure and level in closed-loop systems, such as reactor vessels and hydraulic lines. Its high accuracy ensures that processes like batch mixing or pressure-controlled reactions stay within specified parameters, reducing waste and improving product quality.
For water treatment plants, the transmitter measures differential pressure across filters to detect clogging, or liquid levels in storage tanks to optimize pumping schedules. Its corrosion-resistant housing withstands chlorinated water and wastewater, maintaining performance over extended periods.
In heating, ventilation, and air conditioning (HVAC) systems, the WNK81 regulates air and water pressure, ensuring efficient airflow and temperature control in commercial buildings. It also finds use in power plants, monitoring steam pressure in boilers to prevent overpressure incidents.
In upstream and midstream operations, the transmitter tracks pressure in pipelines transporting crude oil or natural gas. Its HART compatibility allows for remote monitoring of wellheads or storage tanks, enhancing safety in remote locations.
The WNK81 offers flexible range options, from 0-100 mbar for low-pressure applications to 0-400 bar for high-pressure systems, customizable to specific user requirements.
Yes. Its 316L stainless steel wetted parts and PTFE seals make it compatible with most corrosive liquids (e.g., sulfuric acid) and gases (e.g., hydrogen sulfide), except for highly reactive substances like hydrofluoric acid.
Under normal operating conditions, the transmitter maintains accuracy for 12-24 months without calibration. For critical applications, we recommend annual verification using NIST-traceable standards.
Absolutely. Its IP67-rated enclosure protects against dust and water ingress, making it ideal for outdoor use in weather-exposed areas like oil fields or water reservoirs.
While the WNK81 natively uses HART, it can connect to IoT gateways via HART-to-MQTT converters, enabling cloud-based monitoring platforms for real-time data analytics and predictive maintenance.
The WNK81 4-20mA HART High-Accuracy Transmitter combines precision, durability, and versatility, making it a cornerstone of modern industrial measurement systems. Whether in small-scale facilities or large industrial complexes, it delivers consistent performance to keep operations running smoothly.
The WNK81 4-20mA HART High-Accuracy Transmitter stands as a flagship product in WNK’s pressure transmitter lineup, engineered to deliver reliable performance in demanding industrial environments. Designed to bridge physical signal conversion and digital precision, this transmitter converts pressure, differential pressure, and level signals from liquids and gases into standardized 4-20mA analog output while supporting the HART communication protocol—a critical feature for seamless integration with modern industrial control systems.
Built with advanced digital processing circuits and high-sensitivity sensing cells, the WNK81 ensures consistent accuracy across diverse operating conditions, making it a preferred choice for industries where measurement reliability directly impacts operational efficiency and safety. Its robust design balances technical sophistication with user-friendly functionality, catering to both seasoned engineers and facility managers seeking low-maintenance monitoring solutions.
At the core of the WNK81 is its 0.1% full-scale accuracy (typical), outperforming many standard transmitters in its class. This level of precision ensures that even minute pressure or level changes in liquids and gases are captured with minimal error, critical for applications like leak detection in pipelines or precise level control in chemical tanks. The digital signal processing (DSP) unit further enhances stability, reducing drift to less than 0.01% per year—a testament to its long-term reliability.
The transmitter supports dual output modes: the industry-standard 4-20mA analog signal for straightforward integration with legacy systems, and the HART protocol for two-way digital communication. This duality allows users to not only receive real-time measurement data but also remotely configure settings, perform diagnostics, or adjust calibration—eliminating the need for on-site interventions and reducing downtime.
Housed in 316L stainless steel, the WNK81 resists corrosion from aggressive liquids (e.g., acids, alkalis) and gases (e.g., chlorine, methane), making it suitable for harsh environments. It operates efficiently across a wide temperature range of -40°C to 85°C and can withstand pressure spikes up to 5x its rated range, ensuring longevity in unpredictable industrial settings. Additionally, its compact form factor and multiple process connection options (e.g., G1/2, NPT 1/4) simplify installation in tight spaces.
The WNK81 meets global industry standards, including ATEX and IECEx certifications for explosive environments, making it safe for use in oil refineries, chemical plants, and gas processing facilities. It also complies with RoHS directives, aligning with eco-friendly operational practices.
In manufacturing and processing plants, the WNK81 monitors pressure and level in closed-loop systems, such as reactor vessels and hydraulic lines. Its high accuracy ensures that processes like batch mixing or pressure-controlled reactions stay within specified parameters, reducing waste and improving product quality.
For water treatment plants, the transmitter measures differential pressure across filters to detect clogging, or liquid levels in storage tanks to optimize pumping schedules. Its corrosion-resistant housing withstands chlorinated water and wastewater, maintaining performance over extended periods.
In heating, ventilation, and air conditioning (HVAC) systems, the WNK81 regulates air and water pressure, ensuring efficient airflow and temperature control in commercial buildings. It also finds use in power plants, monitoring steam pressure in boilers to prevent overpressure incidents.
In upstream and midstream operations, the transmitter tracks pressure in pipelines transporting crude oil or natural gas. Its HART compatibility allows for remote monitoring of wellheads or storage tanks, enhancing safety in remote locations.
The WNK81 offers flexible range options, from 0-100 mbar for low-pressure applications to 0-400 bar for high-pressure systems, customizable to specific user requirements.
Yes. Its 316L stainless steel wetted parts and PTFE seals make it compatible with most corrosive liquids (e.g., sulfuric acid) and gases (e.g., hydrogen sulfide), except for highly reactive substances like hydrofluoric acid.
Under normal operating conditions, the transmitter maintains accuracy for 12-24 months without calibration. For critical applications, we recommend annual verification using NIST-traceable standards.
Absolutely. Its IP67-rated enclosure protects against dust and water ingress, making it ideal for outdoor use in weather-exposed areas like oil fields or water reservoirs.
While the WNK81 natively uses HART, it can connect to IoT gateways via HART-to-MQTT converters, enabling cloud-based monitoring platforms for real-time data analytics and predictive maintenance.
The WNK81 4-20mA HART High-Accuracy Transmitter combines precision, durability, and versatility, making it a cornerstone of modern industrial measurement systems. Whether in small-scale facilities or large industrial complexes, it delivers consistent performance to keep operations running smoothly.
