Nanjing Wotian Technology Co., Ltd.

Pressure sensor manufacturing for 17 years.

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  • PCWJ Series Vortex Flow Meter
  • PCWJ Series Vortex Flow Meter

PCWJ Series Vortex Flow Meter


■ The structure of Vortex flow meter is simple and strong, no movable parts, and it is very stable.

■ Simple installation and easy maintenance

■ Wide measuring range, the ratio is up to 10:1

■ Low pressure loss and operating costs.

■ When measuring the volume of fluid, compensate as required, replace parts without re-calibrate the flow meter.


The series of Vortex Flow Meter is based on Von Karman’s Vortex Principle, which adopts piezoelectric crystal as testing components. It is a new kind of stress detecting vortex flow meter. It has the advantages of wide range rate, high accuracy, low pressure loss, good medium generality, pulse signal output proportional to flow, convenient to connect with computer etc. As the detector probe of sensor and the vortex generating body are installed separately, and the high temperature resistant piezoelectric crystal doesn’t contact with medium, so the instrument is of simple structure, good generality, and high stability.

PCWJ series Vortex Flow Meter can be used to detect and measure the flow of all kinds of gas, fluid and steam.

1% accuracy stainless steel steam gas liquid fluid vortex flow meter,China 4~20mA RS485 Pulse vortex flowmeter

Vortex flow meter consists of converter (with amplifier board), bracket, bluff body components (Triangular prism, probe) and body. Range for liquid is 0.7m/s~7m/s, for gas, 7m/s~40m/s. Accuracy for liquid is 1.0%, for gas 1.5%. Working pressure 2.5~4.0MPa, applicable to measure gas, fluid and steam.

Product Parameters

Measuring medium

Steam, gas,   liquid (Avoid of multiple-direction fluid)


Liquid:   1.0%         Gas: 1.5%


Liquid:   0.33%        Gas: 0.5%


Liquid:   0.7m/s~7m/s   Gas: 7m/s~40m/s

Working   pressure

Standard   1.6MPa, 2.5~4.0MPa (on request)

Fluid   temperature

-40~250 (Common type); 100~ 350   (High-temperature type)

Body material

304   stainless steel (SS316 is optional)

Output signal

Pulse   (three wires, low level≤1V; High level4V); 4~20mA; RS485

Power supply

24VDC   (12VDC), Lithium battery

Ambient   temperature

-35~ 60 (without LCD); -5~60(with   LCD)

Relative   humidity


Protection   level


Electrical   connection





Production process

PC90D Monocrystalline Silicon  Differential Pressure SensorPC90D Monocrystalline Silicon  Differential Pressure Sensor

PC90D Monocrystalline Silicon  Differential Pressure SensorPC90D Monocrystalline Silicon  Differential Pressure Sensor

PC90D Monocrystalline Silicon  Differential Pressure SensorPC90D Monocrystalline Silicon  Differential Pressure Sensor


PCWJ Series Vortex Flow Meter

Company profile

PCM580 Digital Pressure Gauge (Φ80mm)

Nanjing Wotian Technology Co., Ltd. was established in 2005. It is an outstanding top sensor mkanufacturing enterprise in Jiangning District. The company was rated as Nanjing Engineering Technology Research Center and Nanjing. Municipal Engineering Research Center, Nanjing Enterprise Technology Center, Nanjing Postdoctoral Innovation Demonstration Base; is the unit that formulated the national standards for "Silicon Piezoresistive Pressure Sensitive Chips" and "Silicone Pressure Sensors". It is the leading domestic manufacturer of pressure sensors, with core technology of diffused silicon pressure sensor pressure transmitter, level sensor and temperature sensor and existing staff 305. The annual production of pressure sensors is more than 2 million. The products have been exported to more than 70 countries and regions. Nanjing Wotian was awarded the honorary title of "Sensor Application Program Demonstration Enterprise" by the Ministry of Industry and Information Technology in 2019. "Creating value for customers" is the goal that enterprises always pursue. As leading manufacturer in the domestic pressure sensor industry, the company will revitalize China's pressure sensor business as its own responsibility, work diligently, step by step, strive to make pressure sensors better, and provide customers with cost-effective sensors.  Nanjing Wotian Technology Co., Ltd. has passed ISO9001-2015 quality management system certification and TS16949 certification for the automotive industry.

Company advantage

Mass production

We have one production center in Nanjing and one production center in Anshan with 20,000㎡plant and 170 units of production equipments. The main annual capacity of sensors is about 2,000,000 pieces.

Imported equipments

We imported 20 sets of pressure controller and 150 units of testing ovens to our production line.

Informatization management

We have the information management system of CRM, PLM, ERP, MES and DINGDING etc.

Comprehensive testing

We have our own lab and testing equipment such as lightning stroke, surging, static electricity, vibration, high-low temperature impact test and helium mass-spectrum leak detection.