Low power pressure sensor

[Florijan]

Hello,

is there any pressure sensor 0-cca 10kPa that works on 3V and consumes less than 2mA at the same time. Some sensors are declared to work at 10V and consumes 7mA, is it possible to supply this sensor with 3V and linearly reduce its current consumption to cca 2mA? Did anybody tried this before? I need this sensor to measure water level to about 1m (3-4 feet) deep?

It can be a compensated sensor without internal amplifier as I can add external instrumentation amplifier and mcu.

Best regards.

[TomasVaverka · Accepted solution]

Florijan,

I would recommend considering the following devices.

1. Compensated pressure sensor (no on-board amplification, only temperature compensation and calibration):

MPXx2010G (0 to 10kPa, 10V supply voltage):

http://cache.freescale.com/files/sensors/doc/data_sheet/MPX2010.pdf

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MPXx2010&tab=Buy_Parametric_Tab

The MPXx2010G is capable to work down to ~3V with the current consumption ~2mA.

2. Integrated pressure sensor (including amplifier circuitry on–chip to increase the output signal to ~2.9V for 3V supply voltage):

MP3V5010G (0 to 10kPa, 3V supply voltage):

http://cache.freescale.com/files/sensors/doc/data_sheet/MP3V5010.pdf

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MPXx5010&tab=Buy_Parametric_Tab

Regards,

Tomas

[Florijan]

Thank you Tomas, information that MPx2010G works down to 3V is very helpful and I will work on this sensor.

Best regards,

Florijan