Apera Instruments PH60-VS Handheld pH Meter Tester Kit with LabSen 855 ATC pH Electrode for Lab-Grade pH Measurement of Viscous Liquid Samples

Apera Instruments AI104G GroStar Series GS4 pH/EC/500ppm/700ppm Combo 5-in-1 Pen Tester Kit with Replaceable Double-Junction pH/EC Probe for Hydroponics Water Quality Testing, Gen II

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

Apera Instruments PCO60-Z Bluetooth pH/Conductivity/ORP/Redox/TDS/Salinity/Resistivity Smart Multi-Parameter Meter Tester Kit Powered by ZenTest Mobile App with Cloud-Based Datalogger

APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy

Apera Instruments PH60-PW Handheld pH Meter Tester Kit with LabSen 805 ATC pH Electrode for Lab-Grade pH Measurement in Pure Water and Water Solutions with Low Ionic Strength

Apera Instruments, LLC-AI3141 LabSen 821 Glass-Body pH Electrode for Milk, Cream, Yogurt, Jam, and Sauce, BNC Connector

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 PH700-MS Benchtop Lab pH Meter for Micro-Volume (>15 Micro liters) Water Solution Samples and/or Biological Samples

Apera Instruments Premium-Series PH60S Food pH Pocket Tester Kit, Swiss Spear pH Electrode, ±0.01 pH Accuracy, -2.00-16.00 pH Range (AI313)

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

PH700-BC Benchtop Lab pH Meter for Biotechnology and Pharmaceutical Samples, Liquid Food, Protein-containing Liquids, Compatible with TRIS Buffers

Apera Instruments PH700-HT Benchtop Lab pH Meter for High-Temperature Liquids (up to 130ËšC) and/or Caustic Water Solutions

Apera Instruments SX620 pH Pen Tester Kit with 0.01 pH Accuracy, 3-Point Auto. Calibration, ATC

Apera Instruments SX751 pH/ORP/DO/Conductivity/TDS/Salinity/Resistivity/Portable Handheld Multiparameter Meter Kit, Silver

Apera Instruments PH700-SA Benchtop Lab pH Meter for Strong Alkaline Solutions and/or High Salinity Solutions

APERA INSTRUMENTS AI1116 pH Calibration Solution Kit (7.00, 4.00, 10.01), 16 oz. Each, Plus a CalPod Solution Holder for Easy Calibration, NIST traceable

Apera Instruments AI101G GroStar Series GS1 pH Pen Tester Kit with Replaceable Double-Junction pH Probe for Hydroponics Water Quality Testing, Gen II

APERA INSTRUMENTS AI209-T Value Series PH20 pH Tester Combo Kit, including the Maintenance Set, and a CalPod Solution Holder for Easy Calibration

Apera Instruments PH400 Portable pH Meter Kit with Pre-mixed Buffers, 0.01 pH Accuracy, 0-14.00 pH Measuring Range, 3-Point Auto Calibration, 3' Probe

Apera Instruments Value Series Salt20 Salinity Tester Kit (AI214)

Apera Instruments, LLC-AI3201 LabSen 753 Stainless Steel Spear pH/Temp. Electrode for Foods

Apera Instruments Value Series PH850-DP Portable pH Meter Kit for Dairy Products and Liquid Food