faulty BME680?

Hello,

I have four BME680 and one of them is measuring quite low gas resistances from others. I'm wondering if am facing faulty sensor or it's just normal and it will fix-self after some time?

I'm using own bsec implementation, three sensors are variing from 120k to 170k ish gas resistance while this one is only around 25k - 37k ish.

All other data like temperature, humidity, pressure is measured exactly same as others, so only gas resistance is extremely low

It's not big deal, I can replace this one, but just wanted to know if gas resistance membrane can somehow be broken or it's just coincidence?

 

Thanks

Best reply by Harvey
Hi kriznik,

The raw value of the gas resistance can vary in quite a large range. From a few kOhm to about 1MOhm. This does not indicate a sensor failure.

The BME680 is not an absolute sensor, but rather a relative sensor. The actual value of the raw resistance itself is meaningless, only the variation can be considered "data".
View original
5 replies
Resolved