Pressure Sensors, Transducers
1. What are Pressure Sensors, Transducers?
Pressure Sensors: Devices that convert pressure signals into electrical signals. They operate based on the piezoresistive effect (a material’s resistance changes when force is applied) or the piezoelectric effect (a crystal generates an electrical charge when force is applied). They are commonly used in industrial, medical, and automotive applications.
Pressure Transducers: An extended form of sensor, they typically include signal conditioning circuitry to convert the raw electrical signal to a standard output (such as 4-20mA or 0-10V). They are suitable for harsh environments or high-precision measurements.
2. What are the Main Types of Pressure Sensors, Transducers?
Piezoresistive Sensors: Detect changes in strain gauge resistance using a Wheatstone bridge circuit and output a voltage signal.
Typical Applications: Hydraulic systems and safety control systems.
Piezoelectric Sensors: Utilize pressure on a crystal material to generate an electrical charge. They are suitable for dynamic pressure measurement (such as explosion or vibration monitoring).
Capacitive/Inductive Sensors: Output signals based on changes in capacitance or inductance caused by pressure. They are used in low-power or medical applications.
3. What are the Key Features of Pressure Sensors, Transducers?
Industrial Applications: Real-time monitoring of high-temperature melt pressure (plastics and rubber industries).
Environmental Compatibility: Some models are designed for harsh environments (e.g., high temperatures and corrosive media).
Signal Output: Analog (voltage/current) or digital (I²C/SPI interface).
4. Typical Product Examples of Pressure Sensors, Transducers
Piezo-resistive: MPX2200 (Motorola), GMS110 (Gulton Industries).
Transmitters: 14PC (Micro Switch), NPH (Nova Sensor).