Yes, It will also have a temperature sensor and a humidity sensor as well.
The accuracy for this device is rough to say the least. It is for a portable
weather station, I am not sure why they want an altimeter, except that being
portable who knows where it will end up.

Gordon Varney
Voice Active Remote Inc.
www.talk2it.com



> Gordon Varney wrote...
>
> >
> >The MPX4115A is calibrated and compensated. Then pressure
> measured is correct, so how do I know when the change if from
> >the altitude or a storm? If I am not moving then no problem. The
> altitude is the constant, If there is no storm then the
> >relative barometric pressure is the constant.
>
> One more factor to consider is the effect of ambient temperature
> on your pressure sensor.  Although Motorola's MPX series are
> internally temperature compensated, that compensation is not
> perfect.
>
> There are residual errors in both offset and scale factor.  When
> taken as a percentage of the MPX's entire span these are small;
> but for barometer/altimeter use, where you are using only a part
> of the sensor's full range, they could lead to significant
> errors.
>
> You might consider keeping track of the ambient temperature with
> a suitable temperature sensor, and using that to correct any
> offset/span changes in your MPX.
>
> Dave D.

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