Pressure Transmitter

Product Overview

The pressure transmitter uses high-quality diffused silicon or ceramic core as the signal measuring element. The sensor signal is processed and converted into a standard output signal through a dedicated signal processing circuit. It can replace traditional pressure gauges, Hall elements, and differential transmitters. It can be directly connected to computers, control instruments, and display instruments with stable and reliable overall performance, and is capable of long-distance signal transmission. It features industrial explosion-proof housing and a digital compensation circuit, making it small, lightweight, and very versatile.

Working Principle

The medium pressure acts directly on the surface of the measuring diaphragm of the pressure transmitter, causing a slight deformation of the diaphragm. The high-precision circuit on the measuring diaphragm converts this slight deformation into a voltage signal proportional to the pressure. Then, a dedicated chip converts this voltage signal into an industrial standard 4 to 20 mA current signal or a 1 to 5V voltage signal. After being amplified and compensated for by a linear amplification circuit, the signal enters a microprocessor for data measurement, processing, and display. The measured data is then delivered to remote terminal devices via wired or wireless transmission.

Product Classification

Pressure transmitters can be categorized into either wired or wireless models. The wireless pressure transmitter consists of a pressure sensor, signal processing circuit, communication module, and power module. It is powered by a high-capacity, high-energy lithium battery and transmits data via radio frequency (RF) wireless communication. It can combine various sensors and transmitters to form measurement and control systems for different ranges and specifications. The instrument is easy to install and use without the need for on-site wiring. This avoids the hassle of laying cables and building supports as required by conventional instruments, thus saving labor and construction costs. It is especially suitable for places where wiring is difficult or the power supply is unavailable, making it an ideal upgrade and replacement for traditional pressure transmitters. The wireless pressure transmitter integrates low-power wireless communication, high-sensitivity force sensors, low-power microcontrollers, and explosion-proof technology. With its high precision, easy installation, convenient maintenance, high reliability, and durability in harsh environments, it has been widely used in many industries such as power, metallurgy, chemical engineering, petrochemicals, papermaking and dyeing, brewing, and tobacco.

Key Features and Competitive Edges

• Diffused silicon piezoresistive sensor.
• Wired or wireless transmission for gas and liquid pressure measurements.
• Explosion-proof aluminum housing design with reverse polarity protection, lightning protection, and electromagnetic interference resistance.
• 4.5-digit LCD display: pressure data, battery voltage (for wireless models).
• LED indicators (for wireless models): Reset indicator, configuration mode indicator, network joining indicator, and data acquisition indicator.
• Multiple output signal options are available and customizable to meet customer requirements.
• Zigbee communication/LoRa communication, configurable and testable in the network using a coordinator or router.
• Adjustable installation direction: The device can be installed on on-site pipes or valves via union or transition fittings with adjustable direction.

Technical Specifications

• Operating Environment:
• Temperature, °C: -40 to 65 (wireless), -40 to 85 (wired).
• Humidity, % RH: 5 to 95.
• Measurement range (customizable), MPa: 0 to 110 (wireless), 0 to 60 (wired).
• Accuracy: Class 0.5, Class 1.0.
•  Pressure References: Gauge pressure, Absolute pressure.
•  Power Supply, VDC: 24 or battery.
•  Output Signal: 4 to 20 mA, RS-485 (wired); 4G, Zigbee, LoRa (wireless).
•  Housing Material: Cast aluminum.
•  Media Contact Material: 316L, 304 stainless steel.
•  Process Connector Thread: 1/2″ NPT (M), M20*1.5, R1/2.