Views: 0 Author: Site Editor Publish Time: 2026-10-22 Origin: Site
Choosing the right industrial pressure transmitter depends on your process conditions, required measurement range, installation method, and control system.
Before selecting a model, consider six key factors: pressure measurement type, pressure range, process connection, wetted materials, output signal, and hazardous-area requirements.
Different applications require different pressure measurement principles.
Type | What It Measures | Typical Applications |
|---|---|---|
Differential pressure | Pressure difference between two points | Filter monitoring, flow measurement, tank level measurement |
Gauge pressure | Pressure relative to atmospheric pressure | Pipelines, pumps, compressors, general industrial processes |
Absolute pressure | Pressure relative to a perfect vacuum | Vacuum systems and processes requiring absolute pressure |
Differential pressure transmitters may be selected for micro, medium, or high differential pressure applications. These terms are not universal range standards, so always confirm the actual measuring span and allowable static pressure.
Selection tip: Negative gauge pressure is not the same as absolute pressure. Choose the measurement reference required by your process.
The selected range should cover normal operating pressure and expected fluctuations while remaining within the transmitter's allowable limits.
Check the following before ordering:
Normal operating pressure and minimum/maximum pressure.
Pressure fluctuations and possible pressure surges.
Overpressure rating.
Required units, such as kPa, bar, or MPa.
Static pressure for differential pressure applications.
Vacuum requirements, if applicable.
Do not select a transmitter based only on the maximum pressure value. Confirm the measuring range and overpressure rating separately.
A direct-mount transmitter connects to a compatible threaded process port. Its compact design makes it suitable for many general industrial pressure measurement applications.
Common process connections include M20×1.5, G1/2, and 1/2 NPT. These thread standards are different and should not be assumed interchangeable.
Recommended product: JIECHUANG Intelligent Direct-Mount Pressure Transmitter with 4–20 mA and HART
Flange-mounted designs are suitable when the process equipment uses a flanged connection or requires a specified flange size and pressure rating.
Confirm the flange standard, nominal size, pressure rating, facing type, and material before ordering.
A remote diaphragm seal separates the transmitter from the process medium. A capillary filled with compatible fill fluid transfers the pressure to the sensing unit.
This design may be suitable for corrosive, viscous, crystallizing, or high-temperature media, depending on the selected materials and configuration.
Recommended product: JIECHUANG Intelligent Single-Flange Remote Diaphragm Seal Pressure Transmitter
Wetted materials must be compatible with the process medium and operating temperature.
Material or Design | Key Consideration |
|---|---|
316L stainless steel | Common for many industrial applications; verify chemical compatibility |
Corrosion-resistant alloys | Consider for selected aggressive media |
PTFE-lined construction | May suit certain corrosive processes, subject to design limits |
Remote diaphragm seal | Provides process isolation; diaphragm and fill fluid require careful selection |
Chemical concentration, temperature, impurities, and pressure can affect material compatibility. Confirm all process-contact materials with the manufacturer.
Diffused silicon sensing technology is commonly used in industrial pressure measurement. However, the suitable range, accuracy, and media compatibility depend on the complete transmitter design.
Choose an output compatible with your PLC, DCS, indicator, or monitoring system.
Output | Typical Use |
|---|---|
4–20 mA | Standard analog process signal |
4–20 mA + HART | Analog signal with digital communication |
RS485 / Modbus RTU | Digital communication with compatible systems |
Local display | On-site pressure indication, if available |
Confirm the power supply, wiring arrangement, communication protocol, and available options for the selected model.
Explore more options on the JIECHUANG Pressure Transmitter product page.
For hazardous areas, verify the required certification and protection method before ordering.
Confirm the area classification, gas group, temperature class, cable entry, and required ingress protection. Flameproof protection, intrinsic safety, and IP ratings describe different aspects of equipment protection.
Not every model supports every certification. Check the exact product configuration and applicable certificate.
For a faster and more accurate quotation, prepare the following information:
Measurement type: differential, gauge, or absolute pressure.
Pressure range and normal operating pressure.
Static pressure, if measuring differential pressure.
Process medium and operating temperature.
Wetted materials.
Installation type and process connection.
Output signal and power supply.
Required accuracy and display options.
Hazardous-area certification, if required.
Quantity and any special requirements.
Selecting an industrial pressure transmitter starts with the measurement principle and operating range. Next, choose a suitable installation structure, verify material compatibility, and confirm the output signal and hazardous-area requirements.
JIECHUANG offers industrial pressure measurement solutions for different process and installation needs. Share your operating conditions and technical requirements with our team to help identify a suitable configuration.
JIECHUANG — Reliable Instruments, Trusted Partner.
