A rectangle capsule pressure gauge is a kind of pressure - measuring instrument with a rectangular - shaped casing, which is also known as a rectangular diaphragm box pressure gauge.
The following is a detailed introduction:
Principle
It is mainly composed of a measurement system (including joints, bellows, and a gear - transmission mechanism), an indicating part (including a pointer and a dial), and a casing part. Its working principle is based on the deformation of an elastic element - the bellows. When the measured medium enters the bellows through the joint, the free end of the bellows generates a displacement. This displacement is transmitted and amplified by the pressure of the connecting rod through the gear - transmission mechanism, causing the pointer to indicate the pressure value on the dial.
Characteristics
Good stability: It can measure the total pressure, including the pressure of gases and steam, and the measurement result has nothing to do with the gas type, composition, and properties. During the pressure - measurement process, the air intake and exhaust of the pressure gauge itself are very small, which will not affect the measured air pressure.
Convenient installation: The rectangular casing is easy to install in some narrow spaces or on equipment with specific installation requirements, and it is also convenient for sealing.
Application scenarios
It is suitable for measuring the micro - pressure and negative pressure of neutral and non - explosive gases that do not corrode copper alloys, such as boiler ventilation equipment. It is also widely used in industrial departments such as petroleum, chemical, and metallurgy, or in supporting electromechanical equipment to measure the pressure of various non - explosive fluid media.
Technical parameters
Accuracy class: Usually 2.5.
Weight: About 2kg for the 101 type and 2.5kg for the 121 type.
Electrical indexes (for the YEJ - 121 type): The setting error is less than 2.5% of the full range, the output contact capacity is 3A 220V for AC non - inductive load, the working power supply is AC 220V, and the power consumption is less than 5W.
Pressure interface: Usually equipped with a φ8 interface, matching a φ6 inner - diameter hose.
