js3845金沙线路(CHINA)有限公司-Baidu百科NO.1

Overview

The DW808DR differential pressure transmitter is a high-precision and high-stability pressure transmitter, crafted using strictly selected imported pressure sensors and precision chip-integrated transmitter circuits. It can reliably convert the measured pressure signal into a standard electrical signal ranging from 0-10V Dc or 4-20mA. This product is primarily utilized for pressure measurement and control in various industries, including petroleum, chemical, power, metallurgy, light industry, pharmaceutical, and food.

working principle

The sensor's front-end diaphragm senses the process pressure and transmits it to the other side of the diaphragm; meanwhile, reference pressures (atmospheric pressure, sealed pressure, absolute pressure) act on the other side of the diaphragm. The pressure difference generates a stress field, which causes one side of the diaphragm to compress and the other side to stretch. Two strain resistors located in the compression zone and two strain resistors located in the stretching zone sense the pressure changes and induce resistance changes. These four resistors form a Wheatstone bridge, which converts the pressure signal into an electrical signal under the supply of a constant current source. This signal is then processed through a differential normalization amplifier, a power amplifier, and a voltage-to-current converter, becoming a standard output electrical signal that linearly corresponds to pressure.

performance metrics

Measuring range: 0~3.5MPa

Measurement accuracy: ±0.25%FS or ±0.5%FS

Operating temperature: Sensor: -30 to +85℃, Electronic part: -40 to +85℃

Power supply: 15~36VDC

Output signal: 0-10VDC/4-20mA

Applicable medium: liquid, gas, steam

Process connecting piece: 316 stainless steel, Hastelloy (optional)

Protection: IP65

Product Features

Precision sensors fabricated by micro-machining

The best accuracy can be adjusted to 0.1%FS, with long-term stability of 0.1%FS per year

With only two components, there are minimal spare parts required, resulting in low maintenance costs

Product dimensions