■ EDA.371 Industrial Pressure Transmitter (Railway Application & Zero/Span Adjustment)

-       Zero & span adjustment

-       High insulation grade, > 2000MΩ at 500 VDC

-       Accuracy ±0.5%, ±0.25%, ±0.1% F.S

-       Suitable for railway and industrial applications

 

■ Product Overview

The EDA.371 series is an industrial pressure transmitter designed for high accuracy, durability, and long-term stability in demanding environments.

It is based on a stainless steel 316L piezoresistive silicon pressure sensor and incorporates advanced electronic components and PCB design.

The signal processing circuit includes protection against noise, burst, surge, and high insulation, ensuring stable signal transmission. All units are fully calibrated and tested under strict quality control procedures.

With its high insulation design, the EDA.371 ensures reliable operation in high-voltage and electromagnetically noisy environments.

In addition, the EDA.371 allows on-site zero and span adjustment, enabling users to compensate for installation tolerances, environmental changes, and long-term signal drift without removing the transmitter from service.

The zero/span adjustment function is provided through adjustment potentiometers located on the side of the transmitter body, allowing convenient field calibration and maintenance.

Zero and span values can be easily fine-tuned using a screwdriver without disassembling the electrical connection.

■ Pressure Measurement Principle

The EDA.371 measures pressure using a piezoresistive silicon pressure sensor.

Pressure-induced deformation is converted into an electrical signal, which is amplified and compensated by internal electronics to provide a stable analog output.

 

■ Materials of Wetted Parts

All wetted parts are made of stainless steel 316L, providing excellent corrosion resistance and durability.

 

■ Accuracy Class

▶ ±0.5% F.S (standard)

▶ ±0.25% F.S (option)

▶ ±0.1% F.S (option)

 

■ Zero & Span Adjustment

Zero adjustment: Sets the baseline output signal at zero pressure.

Span adjustment: Aligns the full-scale pressure range with the maximum output signal.

The EDA.371 enables field adjustment through zero and span potentiometers located on the side of the transmitter body, allowing users to fine-tune transmitter performance after installation. This feature helps compensate for installation effects, piping stress, environmental variations, and long-term sensor drift.

As a result, measurement accuracy can be maintained without returning the instrument for recalibration, reducing maintenance costs and system downtime.

 

■ High Insulation

The EDA.371 provides insulation resistance greater than 2000 MΩ at 500 VDC.

This ensures reliable performance in high-voltage environments by protecting the signal from electromagnetic interference, surge voltage, and leakage current.

 

■ Applications

▶ Railway brake systems

▶ Semiconductor manufacturing

▶ Automotive industry

▶ Pneumatic & hydraulic systems

▶ Oil & chemical industry

▶ Heavy industry & shipbuilding

▶ Pharmaceutical industry

▶ Food & beverage industry

▶ Power & energy industry

▶ Water & wastewater treatment