Horological Meandering

Anyone have pictures of watches with thermometers built in?

This is pplater's nice orange-dialed thermo watch (above) and mine with similar design (below)

His clearly has an extended-range thermometer, but mine has a nicer set of Arabic numerals

Now you can see my digital display version with choice of F or C

Stepping it up quite a bit now, with a dial scan of the Patek 89 #1

And here the Gerber Muller/Lord Arran watch (photo from Purists 2003). Temp is indicated with the gold hand at bottom center and shows internal movement temp (tic, tock, etc causing heat?)

With all the variations of temperature around, watch on warm arm (or enclosed pocket) it's unlikely these are very accurate, but a fun complication anyway. Cheers Cazalea

and a timely reminder - never go out for a swim and leave your watch to bake in the sun - even for a few minutes.

Cheers,

amerix

I don't have a picture handy, but the Marie Antoinette PW by Breguet (both the old and the new) have a bimetalic thermometer, if my memory holds

a

First, the classic "mechanical" thermometer, by Ball:



Then, the integrated multi-function quartz watch, although with analog hands, the Tissot T-Touch:



Finally, the modular concept of a multi-functional modul on a mechanical watch: "The Rock" by Linde Werdelin:

Regards,
Marcus

Thanks for the view. I thought there was a thermometer as one of the 4 options in my Seiko "Contra", but it wasn't so. It had a timer and trip meter plus these too.
I know I have had another thermometer watch, what was it .... ? hmmm

No mercury, just batteries in this one.

 

 

 

 

 

 

Vte

I thought about getting one when they were first released, then I completely forgot about them ... maybe time to put back on the list?

Cazalea

With the Satellarium:





Fx

I dredged these up around the web.  A LIP diver with thermometer on the crystal

A pocket thermometer that sold at auction for around $4000

Here's a dual-time watch with smiling face thermometer (no longer filled with mercury)

And a "swiss army knife" version of a watch

But I wonder what all these watch thermometers are actually measuring and how long they take to equilibrate? On the wrist it must be an average of skin and air temperature?

Interesting thread. Thanks.

Andrew

In every one, I've seen the sensing element - whether bimetal strip, mercury column or electronic sensor - is suspended with the case, so they are actually experiencing the inner case air temperature.

The temperature will be the heat in vs the heat out. So on a cold day, they will be warmed by the skin and cooled by the air. On a proper hot day, the other way around. The Heat Transfer calcs for this is hurting my head... conduction through the skin-case-inner air, case-crystal-inner air, conductivity of skin v. air, area in contact...not even going to try.

Suffice to say that on the Aqualand which has a heavy stainless case, it takes about 5 minutes to stabilise on the wrist, but again, that's dependent on the inital temp of the watch, etc etc. 

They are useless as thermometers when against the skin in air. Underwater, the far more effective thermal conductivity of water (approx 25 times air) and the fact that they are effectively surrounded by a water sees the temperatures change/reach equilibrium much faster, within the minute sampling rate of the temp sensor.

That'll do for today's nerdiness.

... the Alpha apparently stems from one of the many Glycine copies around, but where normally two tiny movements are at 8 and 10, permitting two separate time zones to be displayed, here we find the much more interesting barometric and temperature counters. I like that!

Regards,
Marcus