Omron Electronic Components D6F Series: Flow sensors measure airflow and gas-flow speeds using a thermopile

The D6F MEMS (microelectromechanical) flow sensors use thermopiles to convert thermal energy into electrical energy. The use of a thermopile allows them to measure airflow and gas-flow speed from 1 mm/sec to 40m/sec. Typical flow sensors use a resistance-measurement method by tracking the electrical-resistance change of a material according to its change in temperature, requiring adjustment of the resistance balance. The sensors operate from –10 to +60°C, have a 12 to 24V-dc supply voltage, and consume 15 mA. Measuring 15×20×60 mm, the devices also feature an integral orifice with a 1 to 5V-dc analog output. The D6F-01A1-110 has an airflow range from 0 to 1L/minute and costs $72.41 (100); the D6F-20A5-00 has an airflow range from 0 to 20L/minute and costs $125.40 (100).

Omron Electronic Components, www.components.omron.com