Pressure sensors convert pressure into an electrical signal for measurement and control. To select the right sensor, engineers must compare several technical parameters. The pressure range defines the minimum and maximum pressures the device can measure. A sensor should be used within its rated range, while overload pressure and burst pressure indicate how much excess pressure it can survive without damage. Accuracy shows how close the output is to the true pressure. It is often expressed as a percentage of full scale and includes nonlinearity, hysteresis, and repeatability. The output signal may be analog, such as 4-20 mA, 0-10 V, or 0-5 V, or digital, such as I2C, SPI, or RS485. Supply voltage must match the sensor specification, for example 5 VDC, 12-24 VDC, or 3.3 V. Operating temperature affects both electronics and measurement stability. Temperature compensation reduces drift over a defined range. Long-term stability describes how little the output changes over months or years. Response time and sampling rate matter for dynamic pressure changes. Media compatibility is critical: wetted materials must resist the measured fluid or gas. Process connection, electrical connection, and IP rating ensure mechanical and environmental reliability. When reviewing a datasheet, check pressure range, accuracy, output, supply, temperature, overload, burst, stability, response time, and compatibility together. The best sensor is not simply the most accurate; it must match the application's pressure, environment, signal, and budget.