Ningfeng Engineering - Selecting a Pressure Transmitter

Cixi Ningfeng Pressure Gauge Factory

Selecting a Pressure Transmitter

Selecting a Pressure Transmitter
Selecting the correct Pressure Transmitter for the appropriate application can be a complex task. Choosing the incorrect transmitter can make the operation of the equipment ineffective and possibly hazardous. Following the guidelines listed below can assist you in choosing the appropriate pressure transmitter for your specific application.

Sensor
There is a wide variety of sensor technologies to choose from including; Sputtered, CVD, Bonded Strain Gauge, Ceramic Capacitance, and Piezo-electric. Each has their own performance advantages.

Output
The most common output signals are: milliamp (4-20mA), volts (0-5VDC, 1-5VDC, 0.5-4.5VDC, 0-10VDC), and millivolts per volt (100, 200, 300mV/V).

Connection
Some common types of connectors are: 1/4” or 1/2” NPT thread, 1/4” SAE, Sanitary, Flush, among many others. The size of the connection should also be considered.

Accuracy
Accuracy can be expressed along several different parameters, but the most common is as a percent of value of full-scale output (FSO). Accuracy can range from 1% FSO down to 0.01% depending on your requirements. When needed, external zero and span adjustment controls can be added to the transmitter, allowing for fine tuning of the unit.

Electrical Connector
Some common connector types and brands you will see are: Flying Wire (straight wire without any connector attached), DIN 43650, Mini-DIN, Turck, Packard, Lumberg, Submersible, Bendix, 1¼2” Conduit and Terminal Block.

Environment
It may be important to consider whether or not a corrosive agent will come into contact with the transmitter. If this is the case, it will be necessary to ensure that the can (housing) of the transmitter is made with a suitable material such as stainless steel.

Temperature
Temperature is another variable that effects the overall performance of a transducer, particularly its accuracy. Temperature compensation circuitry is added to correct for the inherent temperature induced error of a transducer. If needed, the unit can be compensated to allow it to operate at elevated temperatures.

* Continuous product improvements may result in specifications being changed without notice.
　