How to choose a pressure sensor

Pressure sensors used more widely , to quickly and efficiently select the appropriate pressure sensor , the need for their application to do a comprehensive understanding of the following is selected pressure Crankshaft Position Sensor Replacemen to consider when some parameters. Selects the pressure measurement types: There are several types of pressure measurements , absolute pressure , gauge pressure measurements, true gauge pressure measurements, differential pressure measurement . Absolute pressure measurement , refer to the absolute pressure measurements, ie relative to the vacuum pressure measurement . Refers to a gauge pressure measured relative to atmospheric pressure measurement , the actual ambient atmospheric pressure changes , so some seal an atmospheric pressure Engine Water Temperature Sensor as a reference , the reference pressure is not sealed with the outside atmospheric pressure changes Therefore, such a seal a constant reference pressure sensors are usually referred to as true form pressure sensor . Differential pressure measurement , refers to the two different media to measure the pressure difference between , two pressure ports it needs to pass different pressure medium . Select the appropriate pressure range and overload pressure range, the sensor pressure range is measured by the sensor pressure range , overload pressure is the pressure sensor to ensure proper operation and can withstand the maximum pressure value , the general pressure sensor overvoltage capabilities are in the measurement range of 1.5 times or more . Pressure sensor range to be higher than the maximum pressure range of applications , but not too high, if you select the higher range of the sensor , the measurement range of the sensor output signal change is smaller, measuring accuracy deteriorates.Select the appropriate pressure port, pressure port is to pass the path to the sensor medium pressure , the pressure interface material, usually ceramic , plastic, stainless steel , alloys, etc. , need to pressure medium without corrosive choose different materials. At the same time the pressure interface also has a different shape , a shape and volume flush film formation , etc. If more viscous pressure medium , is recommended flush membrane interface, it is not likely to cause deposition of the media .
Select the appropriate electrical interface , electrical interface with the external circuit of the sensor or system data communication channel, which needs to be considered is the sensor type and size of the supply voltage , the output signal type and connection methods. If the sensor is not added to the signal conditioning circuit , the output of the sensors based on different systems have different output signals, such as a voltage signal in mV , and changes in capacitance or electric signals , then the customer must choose the design of the signal processing circuit , the signal conversion the useful signal can be identified . However, some sensors, the sensor unit after adding the signal conditioning circuit , the output of analog signals such as 0-5V ,4-20mA , etc., while some also add a digital conversion signal , such as output RS232, RS485 or PWM ( Pulse Width Modulation signal ) and so on.Select the appropriate accuracy , different applications , the requirement of the measurement error is different , but the measurement accuracy is higher, the higher the cost of the sensor is often Therefore applications, not one-sided with high precision .Select sensor the temperature range , Crankshaft Position Sensor  usually changes with temperature drift , in order to achieve high-precision measurement , the sensor has a temperature compensation function normally , the temperature compensation range , optimum measuring accuracy . In some high-temperature applications , because most of the electronic components can only work at 85 degrees or less , so you can choose not to bring the amplifier circuit temperature sensor will measure the signals from the high temperature zone and then diverted to the low temperature zone for signal processing