NPA-300B-015A

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Pressure Sensors

Pressure sensors are devices used to measure and monitor the pressure of liquids and gases in a wide variety of applications. Pressure sensors are manufactured using different technologies such as resistive, capacitive, piezoelectric, etc., and are available in several forms such as pressure transducers, pressure switches, pressure transmitters and pressure transducers. The most common type of pressure sensor is the resistive type, which works on the principle of resistance change with applied pressure.

NPA-300B-015A Application Field and Working Principle

NPA-300B-015A is a piezoresistive pressure transducer, which is designed to measure relative pressure, differential pressure, and static pressure levels in the range of -25 kPa to +25 kPa with good accuracy and repeatability. It is most suitable for pressure measurements in diverse mediums in various process control applications. This pressure transducer consists of a series of thin-film piezoresistors and metal diaphragms that convert the physical pressure into electrical signals. This transducer is characterized by several unique features such as memorization and digital output, and is also designed to withstand high temperatures and vibrations.

The working principle of NPA-300B-015A is based on the piezoresistive bridge principle. The transducer consists of four piezoresistors placed in a Wheatstone bridge arrangement. When a pressure is applied, there is a relative change in the four resistors. This change is read across the bridge and converted into a corresponding electrical signal by the integrated circuit. To provide a true pressure reading, the piezoresistors must be relatively linear to pressure. This transducer is designed so that the output voltage is proportional to pressure.

Transducers

A transducer is a device which converts physical quantity or energy to an equivalent electrical signal. Transducers are mostly used to measure physical properties like temperature, pressure, and flow, etc., and convert it into electrical signals for further processing. Transducers are of several types such as piezoelectric, microelectromechanical systems (MEMS), thermocouples, thermistors, etc. Each type of transducers works on a different principle. Piezoelectric transducers are devices based on the principle of piezoelectric effect, where a deformation of the material caused by the applied pressure generates an electrical charge.

The NPA-300B-015A pressure transducer is a type of piezoelectric transducer which works according to the principle of piezoresistive effect. The transducer consists of four piezoresistors placed in a Wheatstone bridge arrangement. When a pressure is applied, there is a relative change in the four resistors which is read across the bridge and converted into a corresponding electrical signal by the integrated circuit.

Hence, the NPA-300B-015A is a piezoresistive pressure transducer designed to measure relative pressure, differential pressure, and static pressure levels in the range of -25 kPa to +25 kPa and is suitable for pressure measurements in diverse mediums in various process control applications.

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