LMI Low differential pressure sensors with I²C bus and 3 V supply

First Sensor presents a new version of its proven flow-based ultra-low differential pressure sensors with 3 V voltage supply and linear I²C bus output signal. The very flat manifold sensors of the LMI series offer measuring ranges from 25 Pa (0.25 mbar) full scale and are based on the thermal measurement of a microflow in the silicon sensor chip. Due to their high measurement sensitivity, accuracy, offset stability and long service life, the sensors are ideally suited for flow measurement of air and gases using the differential pressure method in a bypass arrangement.
First Sensor's innovative microflow technology reduces gas flow through the sensor by several orders of magnitude compared to conventional flow-based pressure sensors. Due to the extreme miniaturization of the flow channel, LMI differential pressure sensors achieve outstanding resistance to dust-laden and humid air and allow the use of long connecting hoses and filters without affecting the calibrated measurement accuracy.

The main features of LMI differential pressure sensors:
- 3 V voltage supply and linear I²C bus output signal
- Microflow channel integrated in the silicon sensor chip
- Outstanding resistance to dust-laden and humid air
- Very flat overall height, suitable for manifold mounting
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Due to their very high resistance to dust-laden and humid air, LMI manifold differential pressure sensors achieve particularly long service lives and extended maintenance intervals in air conditioning and medical technology. Therefore, the sensors are ideally suited for measuring the smallest pressure differences, e.g. in volume flow controllers, filter monitors, burner controls, ventilators, anesthesia devices, sleep apnea therapy devices (CPAP), spirometers and oxygen concentrators.