How To Use A Pressure Transducer?
Pressure transducers monitor and convert pressure variations into analogsignals. There are several types of pressure transducers; however, MicroSensor specializes in selling piezoresistive pressure transducers.
The transducer must maintain its accuracy and reliability over time. It also needs to be pinpointed and precise; however, it requires frequent maintenance and calibration to function optimally. The precision necessary, measuring range, housing material, pressure ports, and output signals, among other specifications, vary from customer to customer.
What’s a transducer?
A pressure transducer is a device that turns mechanical energy, like the energy of a sound, to electrical signals. Transducers are things like the parts of a microphone or the electric guitar pickups that change sound waves into electrical signals. Then, pressure sensors change mechanical pressure (from air, fluid, oil, etc.) into electronic readings.
Different kinds of pressure transducers
Piezoelectric Pressure Transducers
Piezoelectric pressure gauges and piezoelectric sensors utilize the piezoelectric effect to measure acceleration, strain, pressure, temperature, and force. These pressure transducer gauges turn the energy measured into electric charge.
One thing that makes this transducer sensor stand out is that it bends, and when bent, it sends out an electrical signal. The "deflection detection" circuit can be powered by the voltage that piezoelectric pressure sensors generate.
Piezoresistive Pressure Transducer
Apiezoresistive type of pressure transducer sensor is prevalent. The elongation of material causes an alteration in electric resistance, which is how this pressure sensor functions.
Onekeydistinctionbetweenpiezoelectricandpiezoresistivepressuretransducersisthattheformer generates a voltage while the latter alters the circuit's resistance when flexed. Another significant difference is that piezoresistive transducers require external electricity to function.
How does a pressure transducer work?
A diaphragm is a pressure-sensitive element with a constant surface area that can be used as a pressure sensor. The fluid pressure causes the diaphragm to move.Also, the pressure sensor has a transduction component. This transducer converts the diaphragm's mechanical signal into an electronic one. If the pressure increases or decreases, so will the strength of this signal. Note that the calibration of measuring devices is crucial for maintaining pressure within acceptable limits.
They need a power source for pressure transducers to send out electrical signals, and most of the time, the output is 4–20 mA or 0–10 V DC. Also, some systems may use both AC and DC power at the same time. The 4–20 mA signal is the norm in the business world. It has a two-wire setup, while the DC voltage outlet has a three-wire design. You can use the 4–20 mA signal over long distances; it is less affected by noise than a DC signal.
Apressure switch is not the same thing as a pressure sensor. When you reach a certain amount of fluid pressure, a pressure switch opens an electrical link.
Take away
MicroSensor is a leading manufacturer of pressure transducers for applications including marine, process control, industrial gases, beverage and food, HVAC, telemetry, and many more. You can adjust the pressure transducer output from 0.5V-2.5V DC, 0.5V-4.5V DC, 4mA-20mADC, and so on, throughout a wide range (0.1bar-1000bar).
The ATEX certification mean these pressure transducers are suitable for use in potentially hazardous settings. Also, note that design modifications are conceivable.
Source - https://mediatimenews.com/how-to-use-a-pressure-transducer/