[time-nuts] Re: Long term stable environmental sensors

[Björn]

Many 🌙 moons ago I scored a bunch of DPM 7885 pressure sensors off eBay.

The herd of 10ish units were all inside 70cm (pressure converted to altitude by standard atmosphere model).

The local guy calibrating private aircraft altimeters was not interested. The sensors were likely superior to his (transfer) standard.

/Björn 

Sent from my Phone

> On 29 Nov 2022, at 16:49, Lux, Jim via time-nuts <time-nuts at lists.febo.com> wrote:
> 
…
> Measuring pressure or density is a bit trickier. I would think that the standard piezoresistive aneroid sensors (sealed vacuum behind a strain gage, typically micromachined silicon, but could also be on silica) are long term stable. These sensors often have a significant tempco.
> 
> 
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