
This is pH paper and it works and it's good value as you get 2 large rolls. I use it for a number of different things, checking garden soil, checking the water in my paddling pool, checking tap water versus bottled water, and anything else that interests me.

Efficiently Test Your Antifreeze And Battery Acid With A 3-In-1 Refractometer
18 Review

80 Pieces Water Test Litmus Strips Litmus ph Paper Soil Acidity Meter Liquid pH Tester 1-14
10 Review

Digital PH Meter Tester - Tiaoyeer Water Quality Tester With ATC, 0.01PH High Accuracy, 0.00-14.00 Measurement Range, 0.01 Resolution For Drinking Water, Aquarium, Swimming Pools, Hydroponic
8 Review

Portable digital multimeter with sound continuity and thermocouple (electric tester) LTX DT-838
7 Review

π Dioxide Controller for Digital Gas Monitoring
5 Review

π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review

Digital multimeter RGK DM-12
6 Review

π‘οΈ Continuous Temperature Monitoring with Relative Humidity Integration
4 Review