Views: 16 Author: Site Editor Publish Time: 2025-10-18 Origin: Site
◆ VPC Official Spanish Language Website
VPC custom pressure transmitters are designed to meet the accuracy and reliability requirements of demanding OEM and industrial applications. They address the limitations of traditional pressure sensors, such as insufficient accuracy, short lifespan, and poor environmental adaptability. They provide fast, accurate, and stable measurement data for gas, liquid, and level detection.
1. What is a Pressure Transmitter?
Pressure transmitters (also known as pressure sensors) are devices that convert the pressure of a measured medium into a standard electrical signal (such as a 4-20mA current or 0-5V voltage), digital signal, or analog signal. This signal can be easily recognized and processed by controllers, indicators, or computers, enabling real-time monitoring, adjustment, and control of pressure.
Core Functions
Pressure Signal Conversion: Its core function is to convert invisible pressure into a monitorable and controllable electrical signal.
Real-Time Monitoring and Feedback: Providing continuous, stable pressure signals to support process control and automated regulation.
Signal Transmission and Remote Control: Standardized output signals enable long-distance transmission, ensuring data synchronization between the industrial site and the control center.
Key Features
① High Accuracy and Excellent Repeatability
The error is typically within ±0.25% to ±0.5% of full scale, ensuring reliable measurement.
Under the same conditions, the output results remain consistent for multiple measurements of the same pressure value.
② High Stability
Time Stability: Performance (such as zero point and span) remains unchanged after long-term operation, eliminating the need for frequent calibration.
Temperature Stability: The output remains stable despite changes in ambient temperature.
③ Adaptability to Various Media and Operating Conditions
Can be used to measure pressure in media such as air, gas, water, and oil.
Depending on the material and design, it can operate in high-temperature, high-pressure, corrosive, or complex industrial environments.
④ Diverse Output Signals
Analog output (4–20 mA, 0–10 V)
Digital output (RS485, Modbus, I²C, SPI) facilitates integration into various industrial control systems.
⑤ Easy Installation and Use
A variety of threaded connectors and flange standards ensure compatibility.
The compact size makes it easy to integrate into equipment or pipelines.
⑥ High Cost-Effectiveness and Customizability
Compared to mechanical pressure gauges, this product allows for remote signal transmission, making it more suitable for automated systems.
It supports customization of measuring range, output method, and interface material to meet individual industry needs.
2. VPC81MA Diffused Silicon Pressure Transmitter
VPC81MA pressure transmitter is a high stable pressure transmitter by using specific ASIC signal conditioning chip and high performance SS316L diaphragm diffused silicon pressure sensor.
Specific high performance ASIC conditioning circuit
Diffused silicon pressure sensor
Stainless steel, aluminium and copper housing
0.5…4.5V, 4…20mA, 1...5V and 0...10V analog output or I²C and SPI digital output
Fast respond, no hysteresis
Various process thread or other customization port acceptable
Accurate, stable and reliable
| Input | Pressure type | Gauge pressure, sealing pressure, absolute pressure |
| Measuring range | -0.1 to 60MPa | |
| Output | Analog | 0.5...4.5V, 4...20mA, 1...5V, 0...10V |
| Analog | I²C, SPI | |
| Accuracy | 0.20% | Linearity, hysteresis, repetitiveness: <0.2% sensor full range |
| 0.50% | Linearity, hysteresis, repetitiveness: <0.5% sensor full range | |
| Overload | 2.5× pressure sensor full scale | |
| Housing Info. | Housing material | SS304, Cu,Al |
| Wetting material | SS316L | |
| Ingress protection | IP67 | |
| Supply voltage | 5V/24VDC regulated power supply | |
| Temperature | Environment | -40 to 85℃ |
| Storage | -40 to 85℃ | |
3. Different Types of Pressure Sensors
By sensing principle | Piezoresistive/Diffused Silicon Pressure Transmitters | Currently the most widely used and technologically mature type, it covers nearly all general industrial fields. |
| Capacitive | High precision, strong overload capacity, good long-term stability, especially excellent performance in low differential pressure measurement. | |
| Piezoelectric | Used to measure dynamic pressure and has strong high temperature resistance. | |
| By pressure type | Gage Pressure | Using atmospheric pressure as the reference, it is commonly used in industrial piping, hydraulic systems, and pneumatic control. |
| Absolute Pressure | Using vacuum as the reference, it is used for vacuum measurement, meteorological applications, or vacuum packaging calculations. | |
| Differential Pressure | Used to measure the pressure difference between two points, such as measuring flow, measuring liquid level, and monitoring filter pressure difference. | |
| By sensitive element material | Diffused Silicon | High accuracy and fast response make it the choice for high-performance equipment in many industries. |
| Metal Sensor | Medium accuracy offers good tolerance to temperature and cost factors. | |
| Ceramic | High accuracy offers advantages such as impact and corrosion resistance, but is significantly affected by temperature. | |
| By pressure range | High-Pressure Transmitters | Used in applications requiring high-pressure resistance, such as oil and gas, chemical processing, and boilers. |
| Low-Pressure Transmitters | Used for HVAC, gas flow measurement, and monitoring of minute pressure changes. |
4. Application of Pressure Transmitter
Pressure transmitters transform "invisible pressure" into controllable data through precise measurement and signal conversion, monitoring pressure changes in real time to ensure safe and stable equipment operation. The application of pressure transmitters has also expanded from industrial environments to the smart home sector. With the development of 5G and the Internet of Things, safe, stable, and intelligent equipment control is being achieved.
① Smart Home Appliances and Everyday Devices
Pressure transmitters are primarily used in home appliances to monitor water flow, air pressure, or liquid circulation pressure, ensuring safe operation and providing data support for intelligent control.
Water pumps/water purifiers: Monitor inlet and outlet water pressure to prevent idling, blockages, or pipe leaks.
Air compressors: Real-time measurement of gas tank pressure ensures a stable gas source.
Coffee machines/water dispensers: Control water flow and steam output for precise brewing and consistent water flow.
Wall-mounted boilers/water heaters: Monitor gas and water circulation pressure to ensure safe and comfortable heating.
Washing machines/dishwashers: Monitor water pressure to optimize water use and washing results.
② Industrial and System-Level Applications
In industrial environments, pressure transmitters are core components for safe, stable, and intelligent control.
Hydraulic and pneumatic systems: Real-time monitoring of oil and air pressure to prevent overpressure and equipment damage.
Water treatment and pump systems: Used for automatic pump start and stop, constant-pressure water supply, and water hammer detection.
HVAC systems: Monitor duct static pressure, filter differential pressure, and refrigerant pressure to achieve energy savings and intelligent regulation.
Flow and level monitoring: Measure flow or tank level through differential pressure to ensure proper system operation.
Safety protection: Real-time alarms for overpressure, leaks, or abnormal pressure ensure pipeline and equipment safety.
③ Smart Home and Future Trends
With the development of 5G, the Internet of Things, and smart homes, pressure transmitters are becoming essential sensors for intelligent control and device connectivity.
Smart Water Management and Leakage Monitoring: Real-time detection of pipeline pressure changes prevents leaks.
Smart HVAC and Environmental Control: Automatically optimizes air volume and valve opening based on pressure data.
Energy-Saving Control: Pressure sensor data assists the system in automatically adjusting pump speed and air conditioning output for energy-efficient operation.
How do you choose the right pressure transmitter for your application? Contact VPC Pneumatic. We can provide you with professional selection consulting, customization services, and reliable technical support.
English
