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oem mini pressure transmitters

time£º2019-07-30 16:41    source£ºoem pressure sensor

 digital water pressure sensor

How Pressure Transmitters Work
The application of pressure transmitters in daily life is still relatively extensive. It is mainly composed of pressure sensors, measuring circuits and process connections. We also have many people who don't understand the working principle of pressure transmitter and how to connect the pressure transmitter. The following Xiaobian will introduce the working principle and wiring diagram of the pressure transmitter for everyone.

How Pressure Transmitters Work

The working principle of the pressure transmitter is to convert the weak non-electrical pressure-pressure variable collected by the sensor into a standardized signal output that can be transmitted, and at the same time to amplify, and provide secondary alarms, recorders, regulators, and other secondary meters for measurement. , instructions and process adjustments. The converted electrical signal and the pressure variable have a certain continuous function (usually a linear function). The pressure transmitter is mainly composed of three parts: a sensitive element, a sensing element, and a measurement conversion circuit.

The principle of the pressure transmitter is shown below:

Pressure transmitter working principle and wiring diagram

Pressure transmitter principle see the schematic

Pressure variables include positive and negative gauge pressures, differential pressures, and absolute pressures. Pressure transmitter can be divided into general pressure transmitter 0.001-20MPa and differential pressure transmitter 0-1.5kpa according to the pressure measurement range

How to connect the pressure transmitter

Pressure transmitters include capacitive pressure transmitters and resistive pressure transmitters. Pressure transmitters are devices that convert the pressure of a gas or liquid into a usable electrical signal. Pressure transmitter according to the wiring, can be divided into two-wire system, three-wire system, four-wire system. The pressure transmitter has two power lines and two signal lines. The power supply is connected to 24V DC. A simple test method is to use an ammeter or voltmeter to connect the two ends of the signal line.

When the pressure transmitter power is connected, the current meter will have 4mA current or voltage meter with 0V or 1V voltage. Nowadays, the transmitter generally has four terminals, two are wired, and the other two are not wired. The DC24V power line of the transmitter is a 4-20mA signal feedback line at the same time, that is, your secondary The AI ​​point of the table or DAS (data acquisition system) must have a DC24V feed

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