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OHAUS ST300 Portable pH Meter w/0.00 - 14.00 pH Range, 0.01 pH Res

$ 317.88 $ 190.72

Apera PH8500-SL Portable pH Meter for Soil Equipped with LabSen 553 Electrode

$ 409.2 $ 245.52

Oakton Water Meter, pH 5+, w/pH Missing Probes WD-35613-52

$ 87.02 $ 52.21

Apera Instruments LabSen 331 POM-Body pH Electrode for Wastewater Treatment

$ 49 $ 29.4

Hanna Instruments HI84435-01 Mustard Titratable Acidity Mini Titrator & pH Meter

$ 80.63 $ 48.38

Oakton pH 11 Economy Meter Series w/Probe & AC Adapter

$ 154 $ 92.4

Apera LabSen211 Glass-body pH Electrode for General Water with BNC Connector

$ 96.14 $ 57.68

Oakton pH 150 Meter & electrode Item # WD-35614-30 pH 150 Meter, Measures pH, mV

$ 492.8 $ 295.68

Portable Conductivity Meter Cond Tester Accuracy 0.5% F.S With Temp Display

$ 249.48 $ 149.68

Oakton Wd-35413-00 Ph/Con 700 Mtr W/Ph-Cond-Temp Prb

$ 1016.62 $ 609.97

VWR SB90M5 BENCHTOP SYMPHONY METER WITH POWER SUPPLY

$ 215.6 $ 129.35

4812 Fisher Scientific 09-327 Digital Conductivity Meter No Adapter

$ 58.08 $ 34.84

Apera Premium Series ORP60 Pocket ORP Tester Replaceable Probe for general water

$ 101.64 $ 60.98

SENSOREX QUALITY PH ELECTRODE #2

$ 175.99 $ 105.59

AZ8306 TDS Water Quality Salinity Analyzer Instrument Water Conductivity Meter

$ 167.19 $ 100.31

Hanna Instruments Microprocessor pH Meter pH 211

$ 220.66 $ 132.39

Apera Instruments LLC-AI312 Apera Instruments Premium Series PH60F Flat pH Po...

$ 115.01 $ 69

Thermo Scientific Orion 4 Star pH / Conductivity Benchtop Meter

$ 131.99 $ 79.19

Waterproof Bluetooth Pool ORP and Temperature Tester

$ 97.88 $ 58.72

Orion Model 230A Portable pH Meter

$ 55.4 $ 33.24

HM Digital Water Quality Tester TDS Meter TDS-EZ New & Sealed

$ 8.36 $ 5.01

YSI 3252 Conductivity Cells

$ 268.91 $ 161.35

New! pH meter with pH electrode

$ 158.4 $ 95.04

Mettler Toledo 30281896 in-Lab pH Electrode Multi Pin Connector Cable, BNC/RCA

$ 51.04 $ 30.62

Milwaukee MW401 TDS Meter, Automatic Temperature Compensation

$ 103.1 $ 61.86

Ohaus St20c-B Conductivity Meter,Ip67

$ 87.41 $ 52.44

Apera PC910 Benchtop pH and Conductivity Meter Kit - AI5614

$ 533.28 $ 319.96

Apera SX610 Waterproof pH Pen Tester, ±0.1, 0-14.0 pH, Suitable for Tube Testing

$ 58.3 $ 34.97

pH and ORP module with probe for Raspberry Pi, Arduino, Microcontrollers

$ 48.4 $ 29.04

Myron L Company Model 512M5 Single Range DS Meter Nice Condition Made in USA

$ 30.8 $ 18.48

VWR 2052 Portable Electric Conductivity Meter, 23198-034 Conductivity Cell, More

$ 264 $ 158.4

George Fischer 3-8800.103-3P Signet Conductivity Transmitter 2.0 388001033P

$ 175.95 $ 105.57

Yokogawa FLXA21 2-Wire Liquid Analyzer, New in Box

$ 1496 $ 897.6

Myron L 532M1 DS Conductivity Meter. s/n-499720 NEW IN BOX

$ 284.24 $ 170.54

HONEYWELL 31074389 PH METER/ANALYZER ***NIB***

$ 73.92 $ 44.35

Lab Conductivity Meter Cond Tester Wastewater Tester Water Quality Analyzer

$ 217.8 $ 130.68

Fisher Scientific Accumet Research AR15 pH Meter

$ 421.52 $ 252.91

pH Checker Sushi Beer Wine Acidity Alkalinity Analyzer CF Temp Sensor Hydroponic

$ 70.39 $ 42.23

Oakton Replacement Sensor for pHTestr 5S Item # WD-35634-56 Oakton® Replacement

$ 176 $ 105.6

THERMO VSTAR52 Orion™ Versa Star Pro benchtop meter kit with pH/mV module, condu

$ 1149.74 $ 689.84

Apera PH8500-SS Portable pH Meter Kit for Food - LanSen Anti-Contamination Probe

$ 462 $ 277.2

Professional Meter Tester Gauge with TDS Salinity and Temperature

$ 175.12 $ 105.07

GOOD USED KEMOTRON 4 ELECTRODE CONDUCTIVITY METER TYPE 822

$ 191.79 $ 115.07

Mettler MX300 X-matePro Portable pH Meter w/ Probe InLab 409/120 + BNC Media

$ 435.6 $ 261.36

STRANCO SG-700 CHLORINE ANALYZER/CONTROLLER PH/ORP CALIBRATION UNIT

$ 42.24 $ 25.34

Cole-Parmer 05938-50 Digi-Sense Digital LCD pH/mV/ORP Meter Kit, 0-14pH, 9-Volt

$ 220 $ 132

Bluelab Guardian Monitor

$ 351.12 $ 210.67

Corning Ph Temperature Meter Model 308

$ 13.2 $ 7.91

thermo scientific Orion Star a121 Ph Meter For Parts Or Fix

$ 39.6 $ 23.76

THERMO SCIENTIFIC 8220BNWP ORION PERPHECT ROSS COMBINATION PH MICRO ELECTRODE

$ 144.76 $ 86.85

Professional Conductivity Meter Tester Gauge with TDS Salinity Resistivity Modes

$ 425.32 $ 255.19

Ohaus St20c-A Conductivity Meter,Dual Line Lcd

$ 80.59 $ 48.35

Oakton® Replacement Sensor for pHTestr® 5F Item # WD-35634-48 Oakton® Replacemen

$ 70.4 $ 42.24

Apera PC60-DE pH/Conductivity Replacement Probe for PC60-Z Smart Pocket Tester

$ 79.42 $ 47.65

Fisher Scientific Accumet AP62 Portable pH/mV Meter

$ 79.19 $ 47.51

Oakton WD-35614-79 Deluxe pH Meter Accessory Kit, Meter not included

$ 79.42 $ 47.65

Apera 201T-F All-in-one pH/Temp. Electrode, BNC/RCA Connector

$ 58.52 $ 35.11

Cole-Parmer P100 pH Meter Missing Probes

$ 140.78 $ 84.46

NEW HACH LPV431.99.00002 TURBIDIMETER SURFACE SCATTER 7 SC LPV4319900002

$ 3960 $ 2376

Milwaukee MW301 Conductivity Meter, Automatic Temperature Compensation

$ 95.92 $ 57.55

Oakton ORP TESTR 50 WATERPROOF DJ Item # WD-35634-45

$ 264 $ 158.4

^ Denver Instrument Model 220 pH Conductivity Meter W/ Probe #N393

$ 187 $ 112.2

Apera Instruments PC910 Benchtop pH / Conductivity Meter Kit - AI5614

$ 533.28 $ 319.96

Apera Instruments PC60-E Replacement Probe for PC60 Multi-Parameter Tester

$ 66.88 $ 40.12

Oakton Replacement Sensor for ORPTestr 5 Item # WD-35634-58 Oakton® Replacement

$ 61.6 $ 36.96

Drew Marine Conductive Meter With Sensor

$ 316 $ 189.6

pH meter to monitor aquariums & hydroponics using Raspberry Pi, Arduino, ESP8266

$ 36.08 $ 21.64

Sodium Mono Electrode With Connection Cable

$ 61.94 $ 37.16

ECO Testr EC LOW Pocket Conductivity Tester

$ 26.4 $ 15.83

Mini Portable Water Purity Test Tool TDS Water Test Pen Water Quality Analyzer

$ 1.89 $ 1.13

NEW Honeywell 04973-001-333-QD-00-000-000 Conductivity Cell Probe 4973

$ 248.15 $ 148.89

Wedgewood 622 Conductivity & Temperature Monitor Amersham pH-P Transmitter

$ 76.21 $ 45.73

VWR Symphony SB80PI Portable pH Meter w/ Probe Power Tested Needs Calibration

$ 87.99 $ 52.79

Ysi Pro Plus Quattro With 4m Cable Professional Plus

$ 1584 $ 950.4

Fisher Scientific Accumet AR15 Benchtop/Portable pH Meter w/ Probe

$ 79.2 $ 47.52

Omega PHB-212 Microprocessor pH Meter - FOR PARTS OR REPAIR

$ 61.59 $ 36.95

Water Activity Meter WA-60A with Bluetooth for Food Water Activity Testing

$ 523.33 $ 314

YOKOGAWA PH402G-E-1-E/Q/PM EXA PH402 pH ANALYZER/TRANSMITTER PH402GE1EQPM

$ 321.2 $ 192.72

Handheld Digital pH Meter by Sper Scientific - 840087 - Open Box!

$ 88 $ 52.8

Omega PHB-600R Lab pH/mV/Temp Benchtop Meter with Power Supply (6841)

$ 440 $ 264

Myron L Company Series 750 Model 755-20 PPM Parts Per Million Analyzer

$ 35.2 $ 21.12

HM DIGITAL TDS METER Water Quality Tester TOTAL DISOLVED SOLIDS METER TDS-4 *NEW

$ 8.78 $ 5.26

Beckman PHI 40 PH Meter Electrode Temperature Probe

$ 43.99 $ 26.39

Hantek6074BE Oscilloscope Automotive Diagnosis Equipment Car Diagnostic

$ 256.52 $ 153.91

Apera 201-C Combination pH Electrode, BNC Connector

$ 31.15 $ 18.69

Apera Instruments Llc-Ai3101 Labsen 211 Glass-Body Ph Electrode For General W...

$ 138.15 $ 82.89

NEW HONEYWELL 04973-001-333-QD-00-000-000 CONDUCTIVITY CELL 04973001333QD0000000

$ 154 $ 92.4

HAL-HPC300(A) Handheld Optical Particle Counter 3 Channels Dust Analyzer

$ 1658.8 $ 995.28

Oakton pHTestr 5S Spear-Tip Waterproof Pocket Item # WD-35634-52 This pocket-siz

$ 193.6 $ 116.16

Apera PH8500-DP Portable pH Meter for Dairy Products and Liquid Food AI3207

$ 409.2 $ 245.52

Apera 2301T-S Conductivity/Temp. Electrode (K=1), 8-pin Connector

$ 58.52 $ 35.11

Vintage Simpson PH Meter

$ 30.79 $ 18.47

Water Activity Meter Food Spoilage Mold Activity Measurement Test LANDTEK WA-60A

$ 472.55 $ 283.53

Used Thermo Scientific Orion 2-Star pH Meter W/O pH Probe

$ 220.87 $ 132.52

Omega PHPM-70 pH Meter

$ 220 $ 132

Apera Instruments Value Series PH850 Portable Handheld pH Meter Kit

$ 249.96 $ 149.97

Whatman PHA-250 pH Meter, Sold As Is

$ 35.2 $ 21.12

GENERAL CO502 Conductivity Meter,EC Range 10-9990uS/cm

$ 53.82 $ 32.29

Apera DJS-0.1-F Conductivity Electrode for Low Conductivity Measurement

$ 183.92 $ 110.35

GLI International Model 63 pH Analyzer P63A1N1A1A1NNN

$ 153.99 $ 92.39