Digital Pressure Sensors

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Digital pressure sensors measure the pressure of a fluid or gas and convert it into a digital signal for monitoring, control, or analysis. They are widely used in various applications due to their accuracy and ease of integration with digital systems.

Types of Measurement

Digital pressure sensors can be classified based on the type of pressure they measure:

• Absolute Pressure Sensors: Measure pressure relative to a perfect vacuum (zero pressure). These are often used in aerospace for altitude monitoring or in vacuum applications.
• Gauge (Relative) Pressure Sensors: Measure pressure relative to the prevailing atmospheric air pressure. Common applications include monitoring pressure in hydraulic or pneumatic systems and tire pressure.
• Differential Pressure Sensors: Measure the difference between two pressure points in a system. They are useful for monitoring filter conditions, flow measurement, or liquid levels in tanks.

Key Features and Specifications

When selecting a digital pressure sensor, consider these important technical specifications:

• Pressure Range: The minimum and maximum pressure the sensor can accurately measure (e.g., 0 to 100 PSI or -1 to 10 bar).
• Accuracy: Typically expressed as a percentage of the full scale (FS) reading, indicating how closely the measurement matches the true pressure.
• Output Interface: The communication protocol used to transmit the digital signal, such as I2C, SPI, RS485, or CAN Bus.
• Media Compatibility: The types of gas, liquid, or oil the sensor is designed to measure without corrosion or damage.
• Display: Many industrial sensors, such as the Panasonic DP-100 series, feature built-in dual displays (for current and set pressure) and programmable features.