What is the Pressure Indicator

A pressure indicator is a device for measuring the state of a gas or liquid in a system, pipeline, in production. They are used in the regulation and management of various technological processes. A device for measuring and recording pressure changes in automatic pneumatic devices. Cylinders of piston machines. The sensor converts pressure fluctuations into electrical signals, recorded using an oscilloscope and electrical measuring instruments.

Pressure Indicator

The resulting value is displayed or transmitted as an analog or digital output signal. The operation principle depends on the measured pressure type, which can be absolute, gauge, or differential. BCST is one of the best manufacturers of differential pressure gauges and supplies an amount of material. Adjustment of the allowable level of instantaneous consumption.

What is the purpose of the pressure indicator?

It is possible to use pressure indicators to determine the pressure in industrial processes. Overpressure, depression, or vacuum are checked with pressure indicators. In addition to simply indicating the current pressure, pressure indicators can activate relays when exceeding limit values.

Pressure indicators for inspection and control Thus, pressure indicators can sometimes have alarm and regulation functions. The pressure indicators can also be equipped with an analog output to transfer the current pressure value to higher systems. The shape of the pressure gauge casing may vary.

In addition to the very compact pressure indicators of the DP100 series, indicators with larger displays are also available for installation. Pressure indicators are available with different protection classes. The pressure indicators can be fixed through support or installed on a panel. The PT-LE series pressure indicators can also be mounted on a mounting strip.

What are the types of pressure indicators?

  1. Electronic pressure indicator
  2. Mechatronic pressure indicator
  3. Mechanical pressure indicator
  4. Diaphragm seals

Electronic pressure indicator

Electronic pressure indicator for the flush tank of the distillation column. Excellent replacement for a mechanical one! Large bright LED display that is visible from anywhere in the room. A small circuit is easily unsoldered on a piece of “wiring.”

Electronic pressure indicator

For example, it can be integrated with a temperature sensor in one housing as a separate unit. I placed two temperature sensors and a pressure sensor in one housing—indicator readings in mm Hg (two digits).

Mechatronic pressure indicator

Mechatronic flow sensors measure the flow of liquid media such as water, glycol solutions, industrial oils, and refrigerants. Mechatronic sensors work on the principle of a spring-loaded piston. This piston, located in the seat of the valve body, is lifted by the fluid flow, meeting the resistance of the spring. The position of the piston determines the flow. When the flow decreases, the spring acts on the valve and returns it to its original position, preventing backflow. Due to the robust mechanical design, the sensor can be used at high pressure and in harsh environments.

Mechatronic pressure indicator

Mechanical pressure indicator

Mechanical pressure indicator to peak Shuttle Gauge, universal mechanical pressure indicator, compatible with both the pump and separately, swivel design, suitable for car and bicycle nipple, special valve against atmospheric losses.

The mechanical indicator is a self-recording pressure gauge used to record indicator diagrams of fast-flowing periodic processes of pressure changes in the cylinders of reciprocating machines. The sensitivity of the mechanical indicator, which depends mainly on the elastic properties of the spring and the gear ratio of the writing mechanism, is very constant.

Mechanical pressure indicator

Diaphragm seals

The Diaphragm is seals isolate and read an accurate instrument for level gauges, transmitters, and pressure switches, making them ideal for use in chemical or slurry service and can be mounted in any flow direction and have ends threaded manufactured with the standard.

Diaphragm seals

What are the principles of operation of the pressure indicator?

The pressure indicator consists of a primary pressure transducer, which includes a sensitive element – a pressure receiver, secondary signal processing circuits, various body parts, including those for tight connection of the sensor with the object and protection from external influences, and an information signal output device.

The main differences of some devices from others are the measurement limits, dynamic and frequency ranges, accuracy of pressure recording, permissible operating conditions, weight and size characteristics, which depend on the principle of converting pressure into an electrical signal: strain gauge, piezoresistive, capacitive, inductive, resonant, ionization, piezoelectric and other.

What do you need to know when choosing a pressure indicator?

BSCT company produces absolute gauges, differential pressure sensors, and devices for measuring differences and differences in parameters. All devices are manufactured on modern equipment and undergo strict quality control.

  • Absolute pressure sensors are intended for measurement in environments of various characteristics: gases, liquids, aggressive environments;
  • Pressure transducers are designed to create a unified DC signal. In addition, such devices are used to measure quantities in various environments;
  • Overpressure sensors are used in liquid and gaseous media. Allow to determine the desired values ​​in various environments, including aggressive ones;
  • Differential pressure sensors are an integral part of process control systems. They are used to regulate and control technological processes in various industries;
  • Differential pressure sensors determine the change in the flow rate of liquids, gas, or steam. They are distinguished by high measurement accuracy and allow you to find out the flow rate with an accuracy of the minor parameters;
  • Differential pressure sensors are often in demand in the energy industry. They are also used as a controlling element of technological processes in factories of various industries;
  • Hydrostatic pressure sensors are used in liquid media to convert to a unified DC signal;
  • Gauges of excess pressure-vacuum are designed to measure the vacuum pressure of liquid and gaseous media. They control the level of indicators in liquid and gaseous media.

What are the features of a mechatronic pressure indicator?

  • Short reaction time
  • Ease of operation: Switch point setting
  • For sensors with a display, when changing the operating values, you can set the display color to changed/greener
  • Variety of process connection options with adapters.

How does a mechanical pressure indicator work?

Many vehicle systems operate under pressure. It is especially true for those models of machines that have long been removed from the assembly line and were not equipped with modern electronic devices. After all, today, the pressure in pipelines is measured using special electronic sensors, which, in addition to functional features, have nothing to do with such a device as a mechanical pressure indicator.

However, the use of the latter remains relevant today. After all, electronics are not reliable, and when it fails, car owners have to go back to using the good old mechanical pressure indicator.

In many technological processes, it becomes necessary to measure pressure. First of all, to ensure the safe operation of installations and correctly account for the flow of liquids in the pipeline. It is elementary to do this with modern instruments, especially since their characteristics make it possible to obtain accurate pressure data even in an aggressive environment.


Pressure indicators in several versions of pressure monitoring of hydraulic systems and compressors, leak testing, or vacuum systems are just some of the applications for pressure gauges. Pressure gauges are very versatile devices. Pressure gauges are manufactured for three types of pressure: absolute, overpressure, and relative. Absolute pressure has its zero point in an absolute vacuum. The zero point of overpressure is atmospheric pressure. Relative pressure, however, does not have a fixed zero point since the pressure difference between two points defines it. Pressure gauges use different measuring principles to determine pressure.

If you want to contact the BSCT company and have any queries regarding products like pressure indicators, pressure valves, etc., you can email us at info@bsctgroup.com or directly call us at our number +86-15052699328. Our representative will help you order quality products at the best price.

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