We are looking to purchase DS18B20 temperature sensors from a supplier who claims to manufacture them themselves - but I cannot work out if DS18B20 is a product name for Dallas instruments (i.e. buying from other sources is not recommended) or whether DS18B20 refers method of measuring temperature.

  • \$\begingroup\$ It's an IC part number - belonging to Dallas as you say. But it's common (incorrect but common) for low cost PCB assemblies using that part to be sold under that part number. I'm guessing your "sensor" is an assembled PCB - made by your supplier. If they are reputable they will buy the IC itself (DS1820) from Dallas (OK, now Maxim) Otherwise ... who knows what you're getting? \$\endgroup\$ – Brian Drummond Jan 18 '18 at 14:00
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    \$\begingroup\$ I searched for "DS18B20" and got a maxim data sheet. datasheets.maximintegrated.com/en/ds/DS18B20.pdf So, if your supplier is maxim, you are ok. \$\endgroup\$ – Tyler Jan 18 '18 at 14:01
  • \$\begingroup\$ I actually want to buy a waterproof probe with the chip inside. The supplier in question are these guys: jyntc.en.alibaba.com/?spm=a2700.8443308.0.0.sdQTuU The problem I face is that I can't get a waterproof probe from anywhere other than the hobby market which is expensive or supplier in china which appear to be fake \$\endgroup\$ – PaulBarr Jan 18 '18 at 14:25

DS18B20 is the part number for a component made only by Maxim, formerly Dallas Semiconductor.

The 'DS' prefix stands for 'Dallas Semiconductor'.

DS18B20 is not some sort of general noun for what this component is.

  • \$\begingroup\$ Thank you for clarifying that answers my question. I can only find DS18B20 sold on places like Digikey but targeted to the hobby market, out of interest do you know where you can find temperature sensors that aren't £7 a go? \$\endgroup\$ – PaulBarr Jan 18 '18 at 14:22
  • \$\begingroup\$ @PaulBarr Yes the DS18B20, they should be around 1.60 GBP. You can get 10 at amazon with free shipping amazon.co.uk/AZDelivery-DS18B20-Digital-Temperature-Sensor/dp/… \$\endgroup\$ – Christian Jan 18 '18 at 14:30
  • \$\begingroup\$ Thanks Christian. The problem is that we need it to be waterproof, and from Dallas that suddenly makes the whole system £10: amazon.co.uk/… \$\endgroup\$ – PaulBarr Jan 18 '18 at 14:35
  • \$\begingroup\$ 10 water proof ones for 17 GBP amazon.co.uk/dp/B075FV3PQR/… Do you need a proper supplier, or is a one off buy from amazon ok? \$\endgroup\$ – Christian Jan 18 '18 at 14:37
  • \$\begingroup\$ But then I assume those are fake ones from China again \$\endgroup\$ – PaulBarr Jan 18 '18 at 14:38

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