Air Formaldehyde (HCHO) DIY Test kit - Know What's in The Air That Surrounds You (Pack of 3)

2 of the 3 kits were not useable as the solution had leaked out of the containers. Incredibly disappointing. Will be returning.

Only two of the three kits in the pack had the developing chemicals. Luckily I had only planned to test two rooms. Otherwise relatively easy to use.

In general, this test kit works well and the guidelines are easy to follow. The reason that I give a 4, instead of a 5, for accuracy is that the result I get is fairly low (i.e., the colour of the liquid is very faint from my test. It's kind of difficult to tell whether it is 0.02 or 0.04) I guess if someone is really exposed to a high level of CHOH, s/he will definitely get a darker shade of blue/green which would be easier to read. After all, I think the test kit serves as a great self-testing device. Once you find that the level exceeds 0.1, you can always contact professional teams to retest and remove the CHOH.

Bought four for our new house and did two tests, one as instructed (no filter, no fans, with windows closed for a few hours in advance), and the other with just our air filter (AirDoctor - highly recommend for removing VOCs) going so I could get a better idea of the air I was breathing day to day as it runs. I tested our kitchen and our child’s room. The results were surprising .60 without filters running, .20 with filters running. I was alarmed because the safe indoor level is .10, so I emailed the seller and he helped me make sense of the results and come up with a plan of action for the future. I’ll recommend this to friends or anyone purchasing a new home, must buy!

I had order 3 boxes of it, but one of the brown tube is empty or dry. Therefore I just can use two of it.