The sensor is an ideal alternative to the differential pressure sensor for optimizing energy efficiency in air conditioning and ventilation systems, such as variable volume systems and heat recovery units, or for use in high-quality medical equipment and industrial applications.
Omron's new D6F-PH, based on the company's revolutionary MEMS thermal flow sensor chip, delivers higher levels of accuracy and repeatability than standard differential pressure sensors, especially for low flow rates. It measures with superior sensitivity and reproducibility in these environments and over a wider pressure range than commonly used capacitive and piezoelectric differential pressure sensors. Integrated ASICs perform digital correction (linearity and temperature correction), making the D6F-PH more accurate and less affected by temperature than conventional sensors with analog output.
Features of the sensor include a new digital correction algorithm that achieves an accuracy of 3% RD. The system impedance has been increased to reduce the influence of the branch pipe's length and diameter and to provide more stable measurements. The D6F-PH is suitable for use in a branch system where the small differential pressure generated by the opening or flow restrictor is correlated with a high volumetric flow rate in the main pipe. Omron supplies this sensor in three versions, with measurement ranges of 0-250 Pa, ±50 Pa, and ±500 Pa.
The sensor draws a mere 6mA under no-load conditions with a 3.3VDC supply voltage. It features an I2C digital interface with a 12-bit resolution. The new sensor is exceptionally compact, measuring just 26mm x 22mm x 18mm thanks to its redesigned airflow path. The Omron D6F-PH digital differential pressure sensor can also be pre-calibrated to provide temperature measurement or fault detection functions.
