pressure switch andPressure TransmittersAll have 4-20mA output, but the pressure switch has multiple normally open and normally closed functions.
The pressure switch adopts a high-precision, high-stability pressure sensor and transmission circuit, and then uses a dedicated CPU modular signal processing technology to realize the detection, display, alarm and control signal output of the medium pressure signal.The pressure switch can be widely used in petroleum, chemical industry, metallurgy, electric power, water supply and other fields to measure and control the gauge pressure and absolute pressure of various gases and liquids. It is an ideal intelligent measurement and control instrument for industrial sites.
The main categories of pressure switches include normally open and normally closed.The main features are:
It adopts British pipe thread quick connector or copper pipe welding installation structure, which is flexible in installation, easy to use, and does not need special installation and fixing.
The plug-in wire connection method can be selected by the user.
The sealed stainless steel sensor is safe and reliable.
In the pressure range, it can be manufactured according to the pressure value arbitrarily selected by the user.
The pressure switch is a device combined with an electrical switch. When the preset fluid pressure is reached, the switch contact will act.It is mainly used in power plants, petrochemical, metallurgical industries and other industrial equipment to output alarm or control signals. It has important uses in the industrial field. It can prevent damage to important devices in production engineering and avoid major production accidents.
Main sensitive element of pressure switch 2.1 Bellows
Features: Durability and vibration resistance are better than Bourdon tubes, and the adjustable range of connection difference is large. The main materials are stainless steel and phosphor bronze. The price is relatively high, but the measurable pressure range is small, the maximum is 40MPa2.2 membrane piece
Pressure TransmittersElectrical components that feel pressure are generally resistance strain gauges, and resistance strain gauges are sensitive devices that convert the pressure on the device under test into an electrical signal.The most widely used resistance strain gauges are metal resistance strain gauges and semiconductor strain gauges.There are two types of metal resistance strain gauges: wire strain gauges and metal foil strain gauges.Usually, the strain gauge is tightly bonded to the substrate that generates mechanical strain through a special adhesive. When the substrate is stressed and the stress changes, the resistance strain gauge also deforms together, so that the resistance value of the strain gauge changes. The voltage across the resistor changes.
