Epson Toyocom Corporation | Web Exhibition | Miniature, high-precision quartz pressure sensor

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Web Exhibition

High precision & stability
*Small size: 7.0 x 5.0 x 2.0t mm

High-precision sensors react only to pressure and are resistant to the effects of external disturbances such as temperature, humidity, physical shocks, and vibrations.
Quartz is a stable material that can be used as a sensing element in high-precision pressure sensors that resist the effects of external disturbances.

Point! The use of quartz enables tiny sensors that offer high precision.　*Small size 7.0 × 5.0 × 2.0t mm (approx. 1/200th the size of our previous sensor) *High resolution *Measures very slight (0.3 Pa) changes in pressure *High stability *Resistant to the effects of changes in temperature and the environment

Click here for more details about quartz pressure sensors.

Experimental proof of precision

You can see the actual noise characteristics of our sensor versus those of a competitor's MEMS sensor.

Quartz provides highly stable characteristics. Featuring outstanding stability, high-resolution, high-precision quartz pressure sensors have a diverse range of applications.

Experimental proof on a demo unit

To view or print the movie, you need to install Adobe Flash Player, distributed free by Adobe Systems.

When altitude changes by 1 cm, atmospheric pressure also changes very slightly. The amount of changes is very small, only about 0.1 Pa. This demo unit demonstrates the high precision of our quartz pressure sensor. A quartz pressure sensor having a resolution of 0.3 Pa is mounted in the cars of the model train. The sensor measure differences in elevation as the model train travels up and down.

Application examples

More uses

We came up with even more ideas for applications that can take advantage of the quartz pressure sensors high accuracy.
We measured the head speed of a golf club being swung.

Interesting Uses
Calculating speed from acceleration requires integration and other complex computations, and the error is large. Velocity can be found with minimal computation error and high accuracy by using the quartz pressure sensor to detect wind speed velocity.

Specifications

NOTE: The specifications are current as of October 6, 2009.

Items	Specifications
Pressure measurement range	30 kPa to 130 kPa
Overall accuracy	±30 Pa Max.
Linearity	±5 Pa Max.
Repeatability	±5 Pa Max.
Temperature characteristics	±20 Pa Max.
Resolution	0.3 Pa
Operating temperature range	-30 ℃ to +85 ℃
Reference signal source	External supply（10 to 30 MHz）
Temperature sensor	Built in
I/O interface	I²C
Supply voltage	+3.3 VDC
Current consumption	1 mA
External dimensions (mm)	7.0 × 5.0 × 2.0t (Max.)

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