# Counterfeit DS18B20

**URL:** <https://discourse.nodered.org/t/counterfeit-ds18b20/18198>\
**Category:** Hardware\
**Created:** [20 November 2019 14:32 UTC](https://discourse.nodered.org/t/counterfeit-ds18b20/18198 "2019-11-20T14:32:03Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![ghayne](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ghayne/32/39_2.png) [@ghayne](https://discourse.nodered.org/u/ghayne)\
**Post date:** [20 November 2019 14:32 UTC](https://discourse.nodered.org/t/counterfeit-ds18b20/18198/1 "2019-11-20T14:32:03Z")

</div>

I just found this in another forum:

> **[cpetrich/counterfeit\_DS18B20](https://github.com/cpetrich/counterfeit_DS18B20)**
>
> How to tell original from fake DS18B20 temperature sensors. - cpetrich/counterfeit\_DS18B20

[edit] This link [https://www.maximintegrated.com/en/support/faqs/ds18b20-faq.html](https://www.maximintegrated.com/en/support/faqs/ds18b20-faq.html) also shows that the real DS18B20 is also a lot more accurate than we think!

---

<div class="post-metadata">

**Author:** ![baqwas](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/baqwas/32/106_2.png) [@baqwas](https://discourse.nodered.org/u/baqwas)\
**Post date:** [20 November 2019 15:23 UTC](https://discourse.nodered.org/t/counterfeit-ds18b20/18198/2 "2019-11-20T15:23:14Z")

</div>

Stumbled upon your post. Knee jerk reaction on my part to respond. Pardon me!

Related thoughts on DHT11 sensors too! My personal experience with DHT11 (since 2013) is that defect rate for bulk purchases can be as high as 20% for some lots. Use it mainly for training projects. Truly a _buyer beware_ condition.

Also, I avoid Python code (unrelated challenge) for DHT11 if at all possible owing to OS.

Been using DS18B20 (in parallel connection mode) on breadboards also since 2013. Defect rate here is lower but again wouldn't want to use these either for any important (let alone mission critical) projects. The BME680 is perhaps more stable and reliable since "faking" costs are higher and therefore infrequently attempted.

Kind regards.