differential pressure transmitter

May 08, 2023

Differential pressure (pressure) transmitter is a typical self balancing detection instrument that utilizes the working principle of negative feedback to overcome the influence of unfavorable factors such as component materials and processing technology.

differential pressure transmitter

Differential pressure transmitter

Differential pressure transmitters are used to measure the liquid level, density, and pressure of liquids, gases, and vapors, and then convert them into a 4-20mA DC current signal output. JT-3051DP can also be operated through BRAIN or CENTUM CS/ μ XL or HART 275 manual operators communicate with each other for setting and monitoring purposes

Analog type

High precision

Externally continuously adjustable range and zero point

Good stability performance

Positive migration can reach up to 500%, negative migration can reach up to 600%

● Two wire system

Adjustable damping and overvoltage resistance

Solid state sensor design

No mechanical movable parts, low maintenance volume

Lightweight (2.4kg)

Full series unified structure and strong interchangeability

● Miniaturization (166mm total height)

The diaphragm material in contact with the medium is optional

Unilateral overvoltage resistance

Low pressure cast aluminum alloy shell [2]

The differential pressure transmitter is used to prevent the medium in the pipeline from directly entering the transmitter, and the pressure sensing diaphragm is connected to the transmitter by a capillary filled with fluid. It is used to measure the liquid level, flow rate, and pressure of liquids, gases, or vapors, and then convert them into a 4-20mA DC signal output. The cover of the picture shows a domestic brand 3051 differential pressure transmitter

The result measured by the differential pressure transmitter is the pressure difference, i.e. △ P= ρ g△h。 Due to the fact that oil tanks are often cylindrical in shape, the area S of their cross-sectional circle remains constant. Therefore, the gravity G=△ P · S= ρ G △ h · S, S remains unchanged, and G is proportional to △ P. As long as the Δ P value is accurately detected and is proportional to the height Δ h, the detected pressure remains constant during temperature changes, although the oil volume expands or shrinks and the actual liquid level increases or decreases. If the user needs to display the actual liquid level, it can also be solved by introducing medium temperature compensation