Pressure sensors have to meet some challenging requirements to make our lives more comfortable.

1. High resolution

Sensors should measure in the smallest possible unit of measurement.

Ex.) Even very slight changes in atmospheric pressure caused by the opening or closing of doors can be detected.

2. Wide range

Sensors should be able to measure wide pressure ranges and narrow pressure ranges with the same accuracy.

Ex.) A sensor that maintains high resolution even while measuring very large differences in elevation based on large changes in atmospheric pressure

Ex.) A sensor capable of measuring even very small differences in elevation based on minute differences in atmospheric pressure

3. High stability

A sensor should not be affected by external factors such as temperature fluctuations. It should stably and accurately measure pressure over a wide temperature range.

measured values don't drift

Epson Toyocom's Quartz Pressure Sensors

Principle of operation

The pitch of a string instrument such as a guitar is modulated according to the force with which the strings are plucked. The same principle applies to quartz pressure sensors. The frequency at which the quartz crystal vibrates changes when the ends of the crystal are pressed or pulled. An applied pressure can be sensed by measuring the amount of change in frequency.

Features

Capable of measuring elevations in 10 cm increments from sea level up to 5000 m
Employ quartz crystals that are resistant to the effects of temperature changes