Honeywell Sensing and Control ASDX Ultra-Low Pressure Sensors

Honeywell Sensing and Control has announced an upgrade to the ASDX Series that includes the following ultra-low pressure ranges:
  • 0 to 10 inches of H2O gage
  • ± 10 inches of H2O differential
  • ± 5 inches of H2O differential
As with the 1 and 5 psi low pressure sensors, the ASDX Series ultra-low pressure sensors incorporate ASIC technology for faster response, an SPI digital output option, and a 3.3 V power supply.

The ASDX Series is designed to provide digital correction of sensor offset, sensitivity, temperature coefficients, and non-linearity. These sensors are intended for use with non-corrosive, non-ionic working fluids such as air and dry gases.

The ASDX Series’ footprint is slightly larger than the SDX, but includes additional signal conditioning integrated within the product. This allows the customer to remove the components associated with signal conditioning from their PC board to free space and reduce costs normally associated with those components (e.g., acquisition, inventory, assembly). Having this capability within the sensor also eliminates many potential problems that could arise from having multiple components for signal conditioning spread across a circuit board.

The ASDX Series are available in analog or digital output:

Compensated analog output: Provides a ratiometric 12-bit analog output for reading pressure over the specified full scale pressure span and temperature range, allowing for fast and easy integration into standard electronic circuits.

Compensated 14-bit digital output: Provides either an I2C or SPI digital interface for reading pressure over the specified full scale pressure span and temperature range, minimizing connections and providing higher resolution and faster performance through reduced conversion requirements and the convenience of direct interface to the microprocessors or microcontrollers.

  • Barometry
  • Flow calibrators
  • Gas flow instrumentation
  • Sleep apnea equipment
  • Pneumatic controls
  • Ventilation/air flow monitors