■ EDN.650, Differential Pressure Transmitter

- Laser welded flush diaphragm (All stainless steel 316L)

- Piezoresistive silicon pressure sensor

- Differential pressure measurement

 

■ Product Overview

The EDN.650 differential pressure transmitter is designed with all wetted flush diaphragm parts joined by laser welding, and all materials are made of stainless steel (316L).

The pressure sensor is a piezoresistive silicon pressure sensor, with a minimum differential pressure sensing range of 40 mbar, and a maximum static (line) pressure of up to 200 bar.

■ Pressure Measurement Principle

The EDN.650 consists of two piezoresistive pressure sensors, each independently detecting pressure.

Each sensing element is installed inside a stainless steel housing, where the pressure sensor is completely isolated and filled with silicone oil without any air or gas.

The pressure is transmitted through the flush diaphragm, which is the only part exposed to the process pressure.

The pressure applied to each diaphragm is transferred to the differential sensing structure and then to the silicon wafer die.

The silicone oil and sensor die are connected to an amplifier, forming an electrical circuit through wiring, and signal processing is carried out using semiconductor-based integrated circuits.

Through the piezoresistive effect, the input pressure signal forms a precise linear relationship with the Wheatstone bridge output on the silicon die.

Through this process, the differential pressure is accurately measured and converted into an analog output signal.

All wetted parts are made of stainless steel 316L, ensuring excellent corrosion resistance except for special fluids.

The pressure connection can be configured according to application requirements, and a male adapter can be added to the female pressure connection.

■ Product Features

▶ All stainless steel 316L wetted parts

▶ Laser welded diaphragm structure

▶ High static pressure capability (max. 200 bar)

▶Accurate differential pressure measurement

■ Accuracy Class

▶ ±0.5% F.S

■ General Specifications

Differential pressure range	0…400 mbar to 0…35 bar
Static pressure	Max. 200 bar
Accuracy	±0.5 % of F.S
Electrical connection	Plug: DIN43650 A, M12 plug, Cable type
Signal Output	2-wire: 4…20mA 3-wire:0…10V, 0…5 V, 1…5V
Pressure connection	Female G1/4” x Female G1/4”
Process temperature	Operating: -20…100℃ Compensated : -20…80℃