Go Direct pH Electrode, Type: Sealed, gel-filled epoxy body, Ag/AgCl, 12 mm outer diameter, Range: pH 0-14, Isopotential pH: pH 7, Temperature Range: 5 to 80°C, Response Time: 90% of final reading in 1 second
Go Direct* Tris-Compatible Flat pH User Manual, used for any lab or demonstration that can be done with a traditional pH meter, including acid-base titrations, monitoring pH in an aquarium, and investigating the water quality of streams and lakes