There different types of pressure transmitter available in process industry. Different pressure transmitter sensors are available like strain gauge, capacitive, Piezoelectric etc.
Working Principle of Pressure Transmitter
Different types of pressure sensors are as follows -
Piezoresistive strain gage
Uses the piezoresistive effect of bonded or formed strain gauges to detect strain due to applied pressure.
Capacitive
Uses a diaphragm and pressure cavity to create a variable capacitor to detect strain due to applied pressure.
Magnetic
Measures the displacement of a diaphragm by means of changes in inductance, reluctance, LVDT, Hall effect, or by eddy current principle.
Piezoelectric
Uses the piezoelectric effect in certain materials such as quartz to measure the strain upon the sensing mechanism due to pressure.
Optical
Uses the physical change of an optical fiber to detect strain due to applied pressure.
Potentiometric
Uses the motion of a wiper along a resistive mechanism to detect the strain caused by applied pressure.
Resonant
Uses the changes in resonant frequency in a sensing mechanism to measure stress, or changes in gas density, caused by applied pressure.
Magnetic pressure transmitters, also known as magnetic pressure sensors, can be used in water supply systems, provided they are compatible with the operating conditions and requirements of the system. However, it’s important to consider several factors before selecting and installing a magnetic pressure transmitter in a water supply system:
1. Compatibility with the medium: Magnetic pressure transmitters should be compatible with the medium they will be in contact with, which in this case is water. Ensure that the materials used in the construction of the transmitter, such as wetted parts and seals, are compatible with water to prevent corrosion or damage. 2. Pressure range: Choose a magnetic pressure transmitter with an appropriate pressure range that covers the expected operating pressures in the water supply system. Consider both the minimum and maximum pressures the transmitter needs to measure accurately. 3. Environmental conditions: Evaluate the environmental conditions in the water supply system, including temperature, humidity, and potential exposure to chemicals or contaminants. Ensure the transmitter is rated for the specific environmental conditions it will encounter. 4. Installation requirements: Magnetic pressure transmitters typically require proper installation techniques, such as ensuring correct orientation, appropriate mounting positions, and adequate sealing to prevent water ingress. Follow the manufacturer’s guidelines and recommendations for installation. 5. Accuracy and reliability: Consider the required accuracy and reliability of pressure measurement in the water supply system. Magnetic pressure transmitters can provide precise and reliable measurements, but it’s important to select a model that meets the system’s requirements.
By considering these factors and consulting with the manufacturer or a knowledgeable expert, you can determine whether a magnetic pressure transmitter is suitable for your specific water supply system.