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How A Pressure Transmitter Works

Feb 13, 2019


Pressure transmitter working principle


How does the pressure transmitter work?

A pressure transmitter that accepts a pressure variable,

and converts the pressure change amount into a standard output signal,

after the sensor converting it.

The output signal of the transmitter,

is transmitted to the central control room for pressure sign, recording or control.

Pressure Transmitter is a device,

that converts pressure into pneumatic or electric signals for control and remote transmission.

It can convert the physical pressure parameters,

such as gas and liquid felt by the load cell sensor,

into standard electrical signals (such as 4-20mADC, etc.),

to supply the secondary instrument, such as,

the alarm device, recorder, regulator, etc. for measurement and sign. And process change.

The electrical components,

that the pressure transmitter feels pressure,

are generally resistance strain gauges,

which are sensitive devices, that convert the pressure into an electrical signal. The most used resistance strain gauges,

are metal resistance strain gauges and semiconductor strain gauges.

The metal resistance strain gauge,

has two kinds of filament strain gauges and metal foil strain gauges.

Usually, the strain gauge is bonded to the mechanical strain matrix by a special adhesive.

When the stress changes due to the force of the substrate,

the strain gauges are also deformed together,

so that the resistance of the strain gauge changes,

thereby adding The voltage across the resistor changes.

pressure transmitters


The core of the pressure transmitter,

is the pressure sensor and the signal processing circuit.

We use Pressure transmitters in various industrial self-control environments,

involving water conservancy and hydropower,

railway transportation, intelligent construction, production automation, aerospace, military, petrochemical, and many other industries.



The pressure transmitter,

pressure of the measured medium,

is transmitted to the low pressure and high-pressure chambers,

and the sides of the membrane are measured by the action of the filling liquid,

under the action of the isolating diaphragm,

the vibration isolating element and the element.

A pressure transmitter, on both sides of the electrode sheet of the capacitor by a diaphragm,

and each component of the insulation.

When the pressures are inconsistent,

the resulting diaphragm displacement,

displacement and pressure difference are proportional to the two sides of the capacitor,

and the signal is proportional to the pressure by oscillation and demodulation.

The working principle is the same as the differential pressure transmitter pressure transmitter,

and the absolute pressure transmitter.

The difference is that,

the low pressure chamber pressure is atmospheric pressure or vacuum.

A digital conversion current demodulator,

is converted to a digital signal,

whose value is an input pressure value of the microprocessor. The microprocessor controls the transmitter. Besides, its sensor is linearized. Reset range. Engineering unit conversion, damping, prescription, fine-tuning operations, sensors, diagnostics and digital communications.

The program has a 16-byte memory microprocessor,

and has 16 three counters, one for execution/three-dimensional conversion.

Huaheng Instrument, a pressure transmitter supplier,

is committed to developing more reliable and convenient industrial intelligent metering instruments.

Currently, it has constructed natural gas flow meters,

steam flow meters, liquid level meters,

pressure meters, temperature meters, wireless network meters.

Product landscapes such as digital oilfield solutions and energy metering solutions,

are used in digital oil and gas fields, gas metering, and steam metering.