🔍 Optimized Search-Engine Friendly Atlas Scientific Calibration Solution 4.00 Review

This kit worked great. I bought this for work because her pH meter had been out of calibration for a long time. I tried to explain this to the management but they didn't listen to me so I was able to buy a buffer solution at a good price to prove my point!

I have been ordering from this manufacturer for several years. Would give five stars so far. The last batch came gave me some fun calibration curves on my Orion 250A (pretty good instrument). None of my other pH meters could calibrate this batch (failure). Went back to more expensive NIST traceable solutions and found the (advertised) 4.00 solution was 4.15. I think it's a pretty big deal. If I hadn't noticed my meter giving me weird calibration matches I might have ruined some expensive wines.

Your pH measurements are only as good as your calibration fluids. And they were AMAZING! Liquid 4.0 arrived at 4.40am and Liquid 7.0 arrived at 7.20am. This is well above the stated fluctuation of 0.02. The expiration date is 2018 so they should still be good. I wish they were worth returning. I'm out of money now. I was planning on using them for home brewing. I had some questionable readings, so I compared these calibration fluids to the more reliable Milwaukee brand solution, as well as the…