1.Wireless Pressure Sensor Technical Parameters
● Measured medium: liquid, fluid, gas, etc.;
● Pressure type: gauge pressure, absolute pressure;
● Measuring range: 0~0.6MPa~1MPa~10MPa~60MPa~200MPa, customizable;
● Simultaneous output: wireless GPRS transmission (SIM card required), RS485 digital signal, 0~5VDC analog signal;
● Comprehensive accuracy: ±0.1%FS (range above 60MPa), ±0.25%FS, ±0.5%FS;
● Power supply: AC 220VAC (transformer DC 12VDC), DC 7-24VDC (battery powered);
● Insulation resistance: ≥1000MΩ/100VDC;
● Medium temperature: 0~85℃);
● Ambient temperature: -20～70℃;
● Storage temperature: -40～70℃;
● Relative humidity: 0～95%RH;
● Sealing level: IP65/IP68;
● Overload capacity: 150%FS;
● Response time: ≤10mS;
● Stability: ≤±0.15%FS/year;
● Vibration impact: ≤±0.15%FS/year (mechanical vibration frequency 20Hz～1000Hz);
● Electrical connection: standard serial port, aviation connector;
● Sensor size: 26X140MM;
● GPRS terminal size: 103x64x24mm (excluding antenna, mounting handle and 9-core serial port connector).
2. Linearity of wireless pressure sensor
Under normal circumstances, the actual static characteristic output of the sensor is a curve rather than a straight line. In actual work, in order to make the instrument have a uniform scale reading, a fitting straight line is often used to approximately represent the actual characteristic curve, and linearity (non-linear error) is a performance indicator of this approximation.
There are many ways to select a fitting straight line. For example, the theoretical straight line connecting the zero input and full-scale output points is used as a fitting straight line; or the theoretical straight line with the smallest sum of squares of deviations from each point on the characteristic curve is used as a fitting straight line. This fitting straight line is called the least squares fitting straight line.
3. Application of wireless pressure sensors
Wireless pressure sensors are mainly used in the following four aspects:
● In the power industry, wireless pressure sensors can be used in data transmission fields such as reactive power compensation, power distribution monitoring, meter collection, street light monitoring, etc.
● In the water application industry, wireless communication for water meter collection, remote monitoring of water resources management, and waterway network monitoring.
● In the field of environmental protection, online monitoring systems for pollution sources such as flue gas online monitoring (CEMS) and online water quality monitoring.
● In the field of equipment maintenance, such as elevator monitoring, air conditioning monitoring, etc., pressure sensors can be quickly embedded in the user's monitoring instruments to complete the GPRS remote transmission application of equipment monitoring.
