Review on 💧 Apera Instruments Economic Waterproof Accuracy: Uncompromising Precision at Value Price by Ryan Gilliam

I have tested this pH probe with three buffer solutions of pH 4, 7 and 10. It was easy to calibrate and very accurate over the entire pH range. The glass bulb is well protected by a plastic housing. It is easy to wash and wipe dry. Batteries are easy to insert and remove for temporary use. I have used this sensor several times on dilute solutions of known pH and its accuracy has been within 0.1 pH units. The plastic carrying case is handy and goes well with this pocket pH meter. I highly recommend this probe. It easily compares in accuracy and ease of use to the pH probes I use, which cost several hundred dollars. It's also fairly durable and compact. I am very satisfied with this product.