Apera Instruments AI311 Premium Series PH60 Waterproof pH Pocket Tester Kit, Replaceable Probe, ±0.01 pH Accuracy, Lcd display

APERA INSTRUMENTS AI316 Premium Series PC60 5-in-1 Waterproof pH/EC (Conductivity) /TDS (ppm) /Salinity (ppt) /Temp. Multi-Parameter Pocket Tester Kit

APERA INSTRUMENTS AI3711 PH60-Z Bluetooth Smart pH Tester Powered by ZenTest Mobile App with Cloud-Based Datalogger

APERA INSTRUMENTS AI3713 PH60S-Z Smart Spear pH Tester for Food and Solid Sampling pH Measurement'

Apera Instruments AI421 PH400S Portable Ph Meter Kit, 0.01 Ph Accuracy, -2.00 to 19.99 pH Range, GLP Data Management (500 Groups of Data Storage), USB Data Output, 1.3" Height, 3.4" Wide, 7" Length

Apera Instruments AI422 EC400S Portable EC (Conductivity)/TDS/Salinity/Resistivity) Meter Kit, GLP Data Management (500 Groups of Data Storage), USB Data Output, 1.3" Height, 3.4" Wide, 7" Length

Apera Instruments AI423 PC400S Portable Multi-Parameter Meter Kit (pH/EC/TDS/Salinity/Resistivity/Temp.), 1.3" Height, 3.4" Wide, 7" Length

Apera Instruments AI521 PH800 Laboratory Benchtop pH Meter Kit, 0.01 pH Accuracy, GLP Data Management (USB output), BNC connector