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, LLC-AI501 PH700 Benchtop Lab Ph Meter, 0.01 Ph Accuracy, 1-3 Points Auto Calibration, 3-In-1 Ph/Temp. Electrode

Apera Instruments 201T-F All-In-One Ph Electrode, ATC, BNC/RCA Connector, Polycarbonate Body AI1302, Digital

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

Apera Instruments AI480 DO850 Optical Dissolved Oxygen Meter Kit, With 10 ft Optical DO Probe, Hassle-Free Testing Experience

Apera Instruments Value Series PH850 Portable Handheld Ph Meter Kit (AI5510)

Apera Instruments Grostar Series GS2-E Replacement Soil Spear Ph Probe (AI802G)

Apera Instruments AI521 PH800 Laboratory Benchtop Ph Meter Kit, 0.01 Ph Accuracy, GLP Data Management (USB Output), BNC Connector

Apera Instruments Premium Series ORP60 Pocket ORP Tester Kit, Replaceable Platinum ORP Probe, 1 Mv/±0.2% F.S Accuracy, ±1000 Mv Range

Apera Instruments PH60-HF Handheld Ph Meter Tester Kit With Labsen 835 ATC Ph Electrode For Lab-Grade Ph Measurement In Liquids Containing Strong Acid

Apera Instruments EC700 Benchtop Conductivity/Temperature Meter, 1% F.S Accuracy, 0-200.0 Ms/Cm Range, 1-4 Points Auto. Calibration