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June 17, 2011 AT 12:46 pm

NEW PRODUCT – Waterproof DS18B20 Digital temperature sensor + extras

Waterproofds18B20 Lrg

NEW PRODUCT – Waterproof DS18B20 Digital temperature sensor + extras. This is a pre-wired and waterproofed version of the DS18B20 sensor. Handy for when you need to measure something far away, or in wet conditions. While the sensor is good up to 125°C the cable is jacketed in PVC so we suggest keeping it under 100°C. Because they are digital, you don’t get any signal degradation even over long distances! These 1-wire digital temperature sensors are fairly precise (±0.5°C over much of the range) and can give up to 12 bits of precision from the onboard digital-to-analog converter. They work great with any microcontroller using a single digital pin, and you can even connect multiple ones to the same pin, each one has a unique 64-bit ID burned in at the factory to differentiate them. Usable with 3.0-5.0V systems.

In stock and shipping now.


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4 Comments

  1. I wonder if this would work for a sous vide / slow cooker application. With wet cooking, the limit is pretty much 100C. My biggest concerns are how good the waterproofing is. Sometimes they say waterproof, but only for a certain amount of time of submersion. Also, the PVC might not be food grade.

    Anybody have a good handle on these concerns?

  2. These are not food-grade but if your food is wrapped in plastic it doesn’t matter anyways right? These should definately be waterproof enough for sous-vide application – and it rarely gets to even boiling!

  3. I’ve been using a homemade waterproof DS18B20+ probe for sous-vide. The sensor is great, very responsive and accurate. However, I have been keeping my probe wrapped up watertight in foil (replace it with every use because foil deteriorates quickly in warm water.) I learned the hard way that all kinds of nasty plastic stuff can penetrate foodsaver bags and make the food taste and smell awful. The bags are quite permeable by various compounds even though they are airtight. (Odors and flavors from spices permeate these bags, too.)

    I bought one of these for testing because it’s a lot prettier than my homemade probe. But I would be very careful because you never know what will end up in your food.

    I designed an RTD interface for my controller but sadly I’ve yet to get the kind of stability from that that these sensors provide.

    Maybe you guys could offer a version with a PFA cable/jacket? I’d gladly pay a lot more for that.

  4. Hmm, good point. how about using something like this

    http://www.mouser.com/ProductDetail/Qualtek/Q-PTFE-6AWG-02-QB48IN-5/?qs=sGAEpiMZZMutDkoVpcgZZhB%252b3S%252bNaCdJodSJEjCphlc%3d

    to cover the nonstainless part of the sensor? we could send you a 6″ piece if you’d like to try it out

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