The Sensirion CMOSens EM1 is a mass flow meter for gases based on Sensirion's CMOSens sensor technology, which combines a sensor element with amplification and A/D converter circuitry on one CMOS chip. All measurement data is digitally calibrated and temperature compensated by an internal microcontroller.
The EM1 covers a flow range from 0.05 l/min up to 200 l/min depending on type and provides an RS232 and SPI interface. It has selectable integration times between 5 ms and 640 ms, requires a supply voltage of 7 to 18 VDC, and is mounted in a rugged, chemically inert housing that withstands overpressures of 8 bar (116 psi).
| Flow range | 0.05 l/min up to 200 l/min |
|---|---|
| Accuracy | 3% m.v. with 1:100 dynamic range |
| Supply voltage | 7 to 18 VDC |
| Electrical output | RS232 / SPI |
| Maximum operating pressure | 8 bar (116 psi) |
| Temperature sensor range | 0-60 °C / 32-140 °F |
| Operating temperature (ambient/gas) | 0-50 °C / 32-122 °F |
One single device covers a range of 0.05 l/min up to 200 l/min, depending on the type.
Mass flow and temperature data are accessed through an RS232 or SPI interface.
The EM1 requires a supply voltage of 7 to 18 VDC.