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The DS18B20 clones are very popularly assembled into a waterproofed probe with a cable and metal cap. It's a very useful item which as far as I know is difficul
by janekm 6y ago
The DS18B20 clones are very popularly assembled into a waterproofed probe with a cable and metal cap. It's a very useful item which as far as I know is difficult to obtain from one of the official distributors (and would cost significantly more than the eBay specials).
- joshvm 6y agoYou can buy those metal sensor sheaths separately. Search for something like "rtd sheath metal" e.g. ebay #162885663706. $2-3 for a set of 5. Then you pot the sensor with something thermally conductive and waterproof - waterproof potting compound is cheap (e.g. "RS PRO White Epoxy Potting Compound"). Finally heatshrink the outside. You will never beat China prices, but this is one of those parts that's relatively easy to make yourself and shouldn't cost a fortune. The most expensive stuff is the epoxy, but it will last for a while. Purely on performance, does it matter? If it doesn't matter if you're off by a degree or two, then the cheap versions will be OK. If you need the guarantee of a genuine sensor, or a different cable length, or whatever, it'll cost about $20 for five.