Calibrating air quality monitoring devices

Lumen

I have various consumer-grade air quality monitoring devices.

These are, left to right:

Sainlogic Wireless Indoor/Outdoor 8-Channel Thermo-Hygrometer
https://www.amazon.co.uk/dp/B01EEU89R2/ref=pe_385721_51767431_TE_dp_1

LifeBasis Air Quality Monitor
https://www.amazon.co.uk/dp/B078H6QXW2/ref=pe_3187911_185740111_TE_item

Govee Thermo-Hygrometer H5051
https://www.amazon.co.uk/dp/B07K2WPFBX/ref=pe_3187911_185740111_TE_item

The newer ones (Govee and Lifebasis) support basic calibration in the form of applying offsets.

However, I have nothing to calibrate them against except each other.

FWIW the two Govee sensors and the Sainlogic are all within a couple of % of each other on humidity, and the LifeBasis is...different.

What are my options? What do professionals do?

Calahonda52

I think you will find that they buy kit that can be certified by a calibration lab if they are doing certifiable work.

Was on an airtightness testing course earlier this week, (fascinating!) and all the kit needs to be calibrated and certified annually.
The fan, the manometer, the anometer if using one, the thermometer etc, and the IR camera if you have one as part of the service.

If any of the kit is out of its calibration date the whole report is invalid.

Lumen

Thanks Calahonda.

I've found a company just down the road from me that does calibration services, so I'll give them a call and find out how much it costs.

Calahonda52

Lumen wrote: »

Thanks Calahonda.

I've found a company just down the road from me that does calibration services, so I'll give them a call and find out how much it costs.

Of the three of them, which would you rate the best?
Do you have one for each bathroom ?:D

Lumen

The Govees are great. You get this sort of stuff in the app plus CSV download.

I have one inside and outside the shed. The house will be upgraded eventually to match. :pac:

Lumen

Obvs the LifeBasis is a different sort of device. I bought that to monitor particulate and VOC levels when I'm woodworking.

Calahonda52

Lumen wrote: »

Obvs the LifeBasis is a different sort of device. I bought that to monitor particulate and VOC levels when I'm woodworking.

Thanks, so the Lifebasis is the only AQ one?

Lumen

Calahonda52 wrote: »

Thanks, so the Lifebasis is the only AQ one?

Well the others do humidity, but it's the only one that does particulates and VOCs.

I was using it today and the only issue is that it's not designed for continuous running, more for spot checks, so it keeps turning off. A wired one with an alarm would be handy.