Working principle of flameproof pressure gauge

The working principle of the flameproof pressure gauge is to transmit the pressure deformation to the pointer through the elastic deformation of the sensitive elements (Bourdon tube, diaphragm box, bellows) in the gauge, and then the conversion mechanism of the movement in the gauge transmits the pressure deformation to the pointer, causing the pointer to rotate to display the pressure.

The flameproof shell of the explosion-proof pressure gauge has good explosion-proof performance. In the normal working process, due to the influence of sparks or arcs, in addition to being able to withstand the flameproof pressure generated by the explosive gas mixture inside the shell once an explosion occurs, it can also effectively prevent the heat energy generated thereby from spreading smoothly outward, and can only slowly spread outward along the tiny gap of the explosion-proof joint surface inside the shell. At this time, the instantaneous temperature transmitted to the outside of the shell has dropped below the ignition temperature of the explosive gas mixture, so it will not cause explosion transmission.

The flameproof pressure gauge is suitable for use in flammable and explosive occasions. It is different from ordinary pressure gauges. The requirements for flameproof pressure gauges are higher. First of all, the safety factor is high or not. There are many types of flameproof pressure gauges. How to choose a pressure gauge that suits you requires comprehensive consideration. Flameproof pressure gauges are classified by explosion-proof coefficient: intrinsically safe explosion-proof pressure gauges and flameproof pressure gauges. Safety performance: electric contact flameproof pressure gauges, pointer flameproof pressure gauges, and digital display flameproof pressure gauges.

Time : Nov 21, 2024

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Pressure Transmitters for Industrial Pressure Measurement

Xinyi Instrument supplies pressure transmitters for process control, hydraulic systems, petrochemical plants, water treatment, HVAC, power generation and general industrial pressure monitoring. Our pressure transmitter range covers gauge pressure, absolute pressure, differential pressure, high temperature media and digital communication applications.

Choose from compact pressure transmitters, smart 3051 differential pressure transmitters, diaphragm seal models, RS485 digital pressure transmitters and high frequency dynamic pressure sensors. Standard outputs include 4-20 mA, voltage output, HART and RS485 Modbus options, with stainless steel wetted parts and custom process connections available on request.

Pressure Transmitter Parameters

Pressure Types	Gauge, absolute, negative pressure, differential pressure
Measuring Range	From low differential pressure to high pressure ranges up to 100 MPa, depending on model
Output Signals	4-20 mA, 0-5 V, 1-5 V, 0-10 V, RS485 Modbus, HART options
Accuracy	Typical options include 0.1%, 0.2%, 0.25% and 0.5% FS
Process Connection	M20 x 1.5, G1/4, G1/2, NPT and customized thread connections
Wetted Materials	Stainless steel, 316L diaphragm and corrosion-resistant sealing options
Media	Water, oil, gas, air, steam and compatible liquid or gas media
Applications	Pipeline pressure, tank level, flow differential pressure, hydraulic pressure and automation systems

Recommended Pressure Transmitter Series

Xinyi YW-150 - differential pressure transmitter for stable industrial measurement.
Xinyi YW-3051DP - smart differential pressure transmitter for process control.
Xinyi YW-130 / YW-140 - compact pressure transmitters for general pressure monitoring.
RS485 Digital Pressure Transmitter - Modbus communication for remote monitoring systems.
High Temperature Pressure Transmitter - designed for hot media and demanding process conditions.
Siemens, Yokogawa and ABB Options - international brand transmitters available for project matching.

Pressure Transmitter FAQ

What is a pressure transmitter used for?

A pressure transmitter converts the pressure of liquid, gas or steam into a standard electrical signal for PLC, DCS, recorder or control instrument input. It is widely used for pipeline pressure, tank level, flow measurement and process safety monitoring.

How do I choose the right pressure transmitter?

Confirm the pressure range, pressure type, medium, temperature, output signal, accuracy, installation thread, electrical connection and environmental requirements. For corrosive media, high temperature or sanitary applications, diaphragm material and sealing structure are especially important.

What is the difference between gauge, absolute and differential pressure transmitters?

Gauge pressure transmitters measure pressure relative to atmospheric pressure. Absolute pressure transmitters measure pressure relative to vacuum. Differential pressure transmitters measure the pressure difference between two points and are commonly used for flow, filter and level measurement.

Can Xinyi Instrument provide customized pressure transmitters?

Yes. Xinyi Instrument can support customized pressure ranges, process connections, output signals, cable length, display options and model selection for different industrial applications.