Apera Instruments AI413 PC400 Portable Multi-Parameter Meter Kit (pH/EC/TDS/Temp.), 6 Bottles of Calibration Solutions Included, 1.3" Height, 3.4" Wide, 7" Length

Apera Instruments AI413 PC400 Portable Multi-Parameter Meter Kit (pH/EC/TDS/Temp.), 6 Bottles of Calibration Solutions Included, 1.3" Height, 3.4" Wide, 7" Length

Apera Instruments, LLC-AI1109 8oz. pH Calibration Buffer Solution Kit (pH 4.00, 7.00 & 10.01), plus 4oz 3M KCL Storage Solution for pH/ORP Electrodes

Apera Instruments 201T-F All-in-one pH Electrode, ATC, BNC/RCA Connector, Polycarbonate Body AI1302