I looked up the temperature ratings of the major hot air balloon envelope manufacturers
the highest I found was 130°C ânever exceedâ for Ultramagic envelopes, all others below
so far I had no issues with the sensor cable and temperature but then I try not to fly the envelope beyond 100° (much faster aging when hotter)
Are these sensors available in smaller quantities for âregularâ consumers?
Ruuvi is working to get the external sensor for sale and we just received the first samples for testing.
great to hear!
while we did the software mod because it was necessary and our own case weâd be happy to drop this if a suitable stock product is available
Michael
NB this is of course for the sensor only which is inside the envelope, the actual electronics is outside and not exposed to these temperatures
Hi Henry,
curious - whatâs the state of affairs? any timeline?
Iâm also interested in the timeline. Anything more to share?
Hi,
Hopefully we will receive the first batch in December. Will keep updated here once we have news to be shared.
This is an interesting project. Especially I like the goal to make prototyping faster and easier with these sensor boards. I am a new user of RuuviTags (I bought two tags and Ruuvi Gateway from Black Week sale of Verkkokauppa) and I am very interested about possibilities to create different kind of IoT prototypes with Ruuvi products. Recently I also bought an IoT prototyping kit SensorTile.Box PRO made by ST Microelectronics and it would be great to have similar possibilities based on RuuviTags.
Iâm really happy to see this already well under way. Apparently temperature loggers with external sensors are not very common, and neither are ones without silly proprietary apps/protocols. And if you like me need both of those things in one device, they pretty much donât exist. Fortunately it seems to be changing. 
done with qualifying the product yet? when will this show up in the webshop?
I should give an availability timeframe for an interested customer
what should I tell them?
best regards
Michael
We already have external temperature sensors in stock but we are still finishing product packaging and documentation material etc. Please contact us at sales@ruuvi.com for pricing and early units if interested.
thanks, that was the right answer 
inquiry incoming
Michael
post removed misunderstanding.
I sent an email to sales, but did not get a reply. Can you please check the spam folder?
Hi @attah , please write to support@ruuvi.com if for some reason you didnât get a reply yet.
Valitettavasti meillÀ on ulkoisen anturin osalta ikÀviÀ uutisia. Löysimme antureiden rakenteesta piilevÀn ongelman, jonka takia ne kasvattavat RuuviTagin virrankulutusta joissain tapauksissa odottamattomalla tavalla ja paristokesto lyhenee liikaa.
Haluamme tarjota asiakkaillemme ainoastaan huippulaatuisia tuotteita ja tÀmÀn vuoksi olemme pÀÀttÀneet, ettÀ tÀtÀ nykyistÀ versiota ei tulla myymÀÀn tÀllaisenaan verkkokaupassamme. Olemme nyt selvittÀmÀssÀ anturin liiallisen virrankulutukseen johtavan ongelman korjausta niiden valmistajan kanssa. Aikataulu ovat vielÀ avoinna.
Pahoittelumme viivÀstyksestÀ.
Unfortunately, we have some bad news regarding the external sensor. We discovered a hidden issue in the sensorâs structure that, in some cases, leads to an unexpected increase in RuuviTagâs power consumption and shortens battery life.
We aim to offer only top-quality products to our customers, and therefore, we have decided not to sell this current version in our online store. We are currently working with the manufacturer to resolve the issue causing the excessive power consumption. The timeline for this is still open.
We apologize for the delay.
Many are 