APERA INSTRUMENTS 201-C Combination pH Electrode, BNC Connector, Polycarbonate-Body (AI1301)

$7.97

APERA INSTRUMENTS 201DJ-C Double-Junction pH Electrode, BNC Connector, 3 Ft Cable, PC Body

$5.53

Apera Instruments LabSen 241-6 Professional Combination pH Electrode for Small Samples (>0.2 mL), BNC Connector, Lead-Free Glass

$783

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

$5.99

Extech 601500 Standard pH Electrode

$7.99

Apera Instruments LabSen 241-180 Glass-Body Micro pH Electrode for NMR Tubes, BNC Connector

$174.51

Oakton WD-59001-65 Oakton Replacement pH Electrode for pH 5+ and pH 6+ Meters, Single-Junction, Gel, BNC Connector

$44.99

Apera Instruments LabSen Glass-Body 851-1 pH Electrode for Viscous Solutions, Impact-Resistant Sensor, BNC Connector

$52.06

Apera Instruments pH Probe Electrode Sensor Care Maintenance Kit, Including pH 4/7/10 buffers, 3M KCL Soaking Solution, Probe Cleaning Solution, a CalPod Solution Organizer (AI1170)

$14.66

Apera Instruments 3M KCL Storage Soaking Solution (8 oz.) for pH and ORP Electrodes

$3.99

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

$8.99

2 in 1 Temperature pH Monitor Meter Tester Sensor Test Kit 0~14 pH Automatic Calibration BNC Electrode Probe for Hydroponic ph Aquarium Meter Water Lab Food Drinking Water pH of Saltwater/Seawater

$19.99

pH/Oxygen Reduction Potential (ORP) Electrode Storage Solution, 250 mL (8.4 fl oz) — Suitable for All pH Meters — 1M KCl Solution — Keeps Your Probe Conditioned and Helps to Extend its Life

$6.99

Hilitand PH Module Probe Kit, PH0-14 Value Detect Sensor Module + PH Electrode Probe BNC

$25.95

Milwaukee Instruments MA911B/2 Double Junction Ph Electrode with 2 m Cable and Gel Filled Electrolyte Solution

$12.99

Apera Instruments, LLC-AI1312 Apera Instruments 201T-S pH/Temp. Electrode, 8-pin Connector, The Replacement Electrode for Apera 400/400S Series Portable Meters

$15.38

Hanna Instruments HI73127 Polypropylene Spare Electrode with Pin Connection, 0 to 14 pH

$21.99

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

$45.88

Apera Instruments Premium Series PC8500 Portable Handheld pH/Conductivity Meter Kit (AI5524)

$40.1

Milwaukee Instruments MA9015 Storage Solution MA9016 Cleaning Solution fMA9007 pH 7.01 Calibration Solution for pH/ORP Electrodes Lab Bundle (Storage + Cleaning + pH 7.01 + Syringe)

$10.78

Hanna Instruments HI70300L pH/ORP Electrode Storage Solution, 500mL (16.9oz) Bottle

$32.99

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

$42.69

Hanna Instruments HI 70300M Storage Solution for pH/ORP Electrodes, 230mL Bottle

$49.8

Milwaukee Instruments MA9015 Storage Solution MA9016 Cleaning Solution fMA9007 pH 7.01 Calibration Solution for pH/ORP Electrodes Lab Bundle (Storage + Cleaning + Syringe)

$24.99

Milwaukee Instruments MA9016 Cleaning Solution for pH/ORP Electrode, 230 mL Volume

$10.9

HM Digital PH-STOR pH Electrode Storage Solution for Use with PH-200 or PH-80, 60cc Volume

$13.19

Hanna Instruments HI7061L General Purpose Electrode Cleaning Solution, 500mL Bottle

$8.99

pH Buffer Calibration Solution 3-Pack: pH 4.00 Buffer, pH 7.00 Buffer, and Electrode Storage Solution — 250 mL (8.4 fl oz) Each — NIST Traceable Reference Standards for All pH Meters

$7.96

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

$29.99

Innovating Science pH Calibration Solution 4.00, 7.00, 10.00 & pH Electrode Storage Solution, 500ml - 16.9oz (Pack of 4) - Premium pH Buffer Solution Kit

$14.95

RCYAGO Dissolved Oxygen Meter with Electrode Filling Fluid

$45.5

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

$92.61

GAOHOU PH0-14 Value Detect Sensor Module + PH Electrode Probe BNC For Arduino

$8.49

Bluelab PROBPH pH Probe for Water, Replacement Electrode for Meter, Monitor, and Controller with Easy Calibration, Tool for Hydroponic System and Indoor Plant Grow

$88.39

Extech EC500 Waterproof ExStik II pH/Conductivity Meter

$11.99

pH/EC Conductivity Meter with ATC Water Quality Tester 0.0-14.0pH / 0~19.99ms/cm Aquarium, Hydroponics Tool

$199

pH Buffer Calibration Solution, pH 7.00 — 1 Gallon — NIST Traceable Reference Standards for All pH Meters — Color Coded Yellow

$14.95

Thermo Scientific Orion Ross pH Electrode Storage Solution, 475 ml Bottle

$13.42

Apera Instruments AI1113 pH Calibration Buffer Solution Kit (7.00, 4.00), 8 oz. Each

$7.99

Hanna Instruments HI7007L 7.01 pH Calibration Buffer Solution, 500mL Bottle

$21.99

Atlas Scientific pH/ORP Electrode Storage Solution 125ml (4oz)

$9.99

pH Buffer Calibration Solution, pH 10.00 — 1 Quart (950 mL) — NIST Traceable Reference Standards for All pH Meters — Color Coded Blue

$6.99

Hanna Instruments HI7004L 4.01 pH Calibration Buffer Solution, 500mL Bottle

$6.99

pH Buffer Calibration Solution Kit 4-Pack — 250 mL (8.4 fl oz) Each: pH 4.00 Buffer, pH 7.00 Buffer, pH 10.00 Buffer, and Electrode Storage Solution — NIST Traceable Reference Standards

$39

Bluelab Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each

$18.24

PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium

$22.99

Oakton WD-00653-04 pH/ORP Electrode Storage Solution, 1 Pint Bottle

$39.99

AC Infinity pH Meter PRO Kit, High Precision Digital pH Pen with ±0.01 pH Accuracy and Interchangeable Probe, Nutrient Test pH Meter for Water Hydroponics Plants, Gardening, Aquariums, Swimming Pools

$19.99

pH Buffer Calibration Solution, pH 4.00 — 1 Quart (950 mL) — NIST Traceable Reference Standards for All pH Meters | Color Coded Red

$34.99

Innovating Science 7.00 pH Standard Buffer Solution, Yellow, 500mL - The Curated Chemical Collection

$14.99

BOJACK 15 Pack of pH Meter Buffer Solution Powder for Precise and Easy PH Calibration, PH Calibration Powder Solution 4.01pH,6.86pH and 9.18pH

$30.5

Milwaukee Instruments MA9015 Storage Solution for pH/ORP Electrode, 230 mL Volume

$23.34

Pool Salt Tester pH Meter ORAPXI Salinity Meter and pH Tester PPM EC Meter with LCD Screen 5 in 1- Salt pH TDS EC Meter for Saltwater Pool, Hot Tubs, Spas, Aquarium, Hydroponics System, Home Brew

$84

Innovating Science Clear 7.00 pH Standard Buffer Solution, 1L - The Curated Chemical Collection

$7.96

PmoYoKo Digital pH/TDS Meter with ATC pH Tester, 3 in 1 0.01 Resolution High Accuracy pH Pen Tester for Water with LCD Backlit, Tds Meter pH Meter for Drinking Water, Wine, Pool and Aquariums

$10.99

PINPOINT® High-Precision pH Calibration Fluids Kit (pH Buffer Solution), 12 Piece Set - pH 4.000, 7.000, 10.000

$23

pH Buffer Calibration Solution Kit 2-Pack — one pH 4.00 (red) and one pH 7.00 (Yellow), Each 500 mL (1.06 Pint) — NIST Traceable Reference Standards for All pH Meters

$25.99

Bluelab STSOL100BL STSOL100 KCL Storage Solution for pH Probes, 100ml, 100 ML, natural

$71.49

VIVOSUN PH Meter Digital PH Tester Pen 0.01 High Accuracy Water Quality Tester with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium, with ATC, Army Green

$95.24

Pinpoint® High-Precision pH Calibration Fluids Kit (pH Buffer Solution), 10 Piece Set - 4.000, 7.000

$23