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Pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and remote transmission. [1]
It can convert the physical pressure parameters of gas and liquid sensed by the sensor of the pressure measuring element into standard electrical signals (e.g., 4-20mADC, etc.) to supply secondary instruments such as indicator alarms, recorders, and regulators for measurement, indication, and process regulation.
Principle of operation:
Pressure transmitter to feel the pressure of the electrical components are generally resistance strain gage, resistance strain gage is a kind of pressure will be measured on the piece converted into an electrical signal sensitive devices. The most widely used resistance strain gauges are metal resistance strain gauges and semiconductor strain gauges. There are two types of metal resistive strain gauges: filament strain gauges and foil strain gauges. Usually, the strain gauges are tightly bonded to the mechanical strain generating substrate by special adhesive. When the substrate is subjected to stress change, the resistance strain gauges will also deform together, so that the resistance value of the strain gauges will be changed, which will make the voltage applied on the resistor change.
Main performance:
1, the use of a wide range of measured media, can measure oil, water and paste compatible with 316 stainless steel and 304 stainless steel, with a certain degree of corrosion resistance;
2, high accuracy, high stability, the use of imported original sensors, good linearity, high temperature stability;
3, small size, light weight, installation, commissioning, easy to use;
4, stainless steel fully enclosed shell, waterproof;
5, the pressure sensor directly senses the measured liquid level pressure, not affected by the media blistering, deposition.
Main advantages:
1, the pressure transmitter has a reliable work, stable performance and other characteristics;
2, dedicated V / I integrated circuits, less peripheral devices, high reliability, simple and easy maintenance, small size, light weight, installation and commissioning is extremely convenient;
3, aluminum alloy die-casting shell, three-terminal isolation, electrostatic spraying protective layer, durable;
4, 4-20mA DC two-wire signal transmission, strong anti-interference ability, transmission distance;
5, LED, LCD, pointer three kinds of indication table head, site reading is very convenient. Can be used to measure viscous, crystalline and corrosive media;
6, high accuracy, high stability. In addition to imported original sensors have been corrected with a laser, the entire machine in the use of temperature range of the comprehensive temperature drift, non-linearity for fine compensation.
Instructions for use:
Daily maintenance
1, check the size of the mounting holes: if the size of the mounting holes is not appropriate, the sensor in the installation process, the threaded part of the sensor will be easily subject to wear and tear. This will not only affect the sealing performance of the device, but also make the pressure sensor can not give full play to its role, and may even produce safety hazards. [...]
