■ EDR.345 Ratio-metric Output Pressure transmitters

-       Ratio-metric output (0.5…4.5V / 5V)

-       Designed for low supply voltage environments

-       High stability against voltage fluctuation

-       Optimized for automotive & industrial control systems

 

■ Product Overview

The EDR.345 pressure transmitter is designed based on a 0.5…4.5V / 5V ratio-metric output system, which requires more advanced analog design technology compared to conventional current (4…20mA) or voltage outputs (0…10V, 0…5V, 1…5V).

 

It is specifically designed for low supply voltage environments and battery-powered systems such as automotive applications, where power supply fluctuations frequently occur. The output signal responds proportionally to supply voltage variations, ensuring accurate and reliable pressure measurement.

 

The transmitter incorporates mathematical modeling for sensor characteristics and digital compensation, enabling precise compensation for pressure and temperature variations. Calibration and programming are performed under controlled test conditions to ensure consistency and accuracy.

 

With its modular design, the EDR.345 allows flexible adaptation of electronic circuits and system configurations to meet various industrial requirements. It also supports a wide range of pressure connections and electrical interfaces.

 

The transmitter is designed to maintain stable performance even under harsh conditions such as noise, vibration, and sudden power surges.

 

■ Pressure Measurement Principle

The EDR.345 measures pressure using a piezoresistive silicon pressure sensor.

 

Process pressure causes a slight deformation in the sensing element, which is converted into an electrical signal.

 

This signal is processed and output as a ratio-metric signal proportional to the supply voltage.

 

This method minimizes the influence of power supply fluctuations, ensuring accurate measurement especially in battery-powered systems.

 

■ Materials of Wetted Parts

Wetted parts are constructed with materials suitable for industrial applications, ensuring compatibility with various operating conditions.

■ Accuracy Class

The standard accuracy of the EDR.345 series is as follows:

▶ ±0.5% F.S

 

■ Applications

The EDR.345 is suitable for the following applications:

▶ Fuel cell vehicles

▶ Secondary battery systems

▶ Water treatment control systems

▶ HVAC systems

▶ Compressor systems

▶ Pump systems

▶ Pneumatic & hydraulic systems

 

■ General Specifications

Pressure ranges	-1…0 bar to 0…1000 bar
Accuracy	Better than ± 0.25% F.S
Electrical connection	DIN 43650 mpm plug M12 plug 2m cable on request
Signal output	0.5…4.5V/5V power supply, 3-wire system
Operating temperature	-20…+80 ℃ / standard -40…+125℃ / option