Today, we’ll introduce you to pressure transmitters!

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Introduction: Pressure transmitters are used to measure the level, density, and pressure of liquids, gases, or vapors, and then convert the pressure signal into a 4–20mA DC signal for output. The main types include capacitive pressure transmitters, diffused silicon pressure transmitters, ceramic pressure transmitters, strain gauge pressure transmitters, etc. I. Classification of pressure transmitters 1. Gauge pressure type pressure transmitters Gauge pressure type pressure transmitters are those that use the local atmospheric pressure as the reference zero point. 2. Pressure transmitter: A pressure transmitter is a type of pressure transmitter that uses vacuum level as its reference zero point. During use, the sensor’s reference zero point can be automatically adjusted as the location changes, without the need for calibration. Its appearance is identical to that of a gauge-type pressure transmitter. 3. Differential pressure transmitter: A differential pressure transmitter is a pressure transmitter used to measure the pressure difference between two pressure chambers; it has two such chambers, labeled “+” and “-”. To accommodate the pressures of the two values as comparison values respectively, the side with the higher pressure is usually designated as the “+” pressure chamber. Please note: when ordering differential pressure sensors, pay attention to a parameter specific to differential pressure transmitters——static pressure tolerance. For example, in a differential pressure transmitter that we use, if the pressure at the “+” terminal is 10 MPa and the pressure at the “-” terminal is 10.5 MPa, then the differential pressure measured by this transmitter is: 10.5 – 10 = 0.5 MPa. The static pressure acting on this transmitter is 10 MPa. In practical applications, the use of high static pressure and low differential pressure is common in field settings. The static pressure acting on the ordered differential pressure transmitter should not exceed its allowable static pressure value; otherwise, it is prone to damage. II. Main advantages of pressure transmitters: Pressure transmitters feature reliable operation and stable performance; they are equipped with dedicated V/I integrated circuits, have few peripheral components, offer high reliability, are easy to maintain, are compact and lightweight, and are extremely convenient to install and adjust. Aluminum alloy die-cast casing with three-terminal isolation and an electrostatic spray paint coating for durability. 4-20mA DC two-wire signal transmission, with strong anti-interference capability and long transmission distance. With LED, LCD, and pointer display types, it is very convenient for on-site reading. It can be used to measure viscous, crystalline, and corrosive media. High accuracy, high stability. In addition to the imported original sensors being laser-adjusted, comprehensive compensation is provided for the overall temperature drift and non-linearity of the device within its operating temperature range.