The ones I've gotten differ by 0.1, but I've found my readings consistently vary by the same number even at different pH levels, so I agree admit it's a bit different because I can figure out what the correct number is by just adding 0.1 to the reading and it's the only 6.86 solution I can find on Amazon.
π§ Certified Laboratory Deionized Water Demineralized: Ensuring Pure and High-Quality Results
3 Review
Premium Grade DMSO Roll-On - Non-Diluted 99.995% Low Odor - 3 Oz. Bottle - BPA-Free Container
10 Review
California Gold Nutrition CollagenUP por., 464 g
23 Review
Semi-synthetic engine oil IDEMITSU Zepro Euro Spec 5W-40, 4 l, 3.84 kg, 1 pc.
26 Review
ULAB Scientific 1000Ml Borosilicate Glass Beaker With Printed Graduation - Durable And Accurate For Lab Use (UBG1005)
12 Review
Get 24 Pack Of 4 Oz. Amber Boston Round Glass Bottles With Droppers From GBO GLASSBOTTLEOUTLET.COM
11 Review
Graduated Erlenmeyer Glass Flask Set With Narrow Mouth - 500Ml Capacity
15 Review
Get Your All-Purpose Cleaning Solution With Bealee'S 24 Oz Plastic Spray Bottles - 2 Pack
16 Review