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Newtry WGZ-1B Turbidimeter

$ 24.64 $ 14.78

Oakton Instruments Waterproof TDS Tester Pure 35661-20 Meter

$ 3.24 $ 1.94

Denver Instruments UltraBASIC UB-5 pH Meter with Probe

$ 175.99 $ 105.59

Milwaukee Martini Instruments ORP57 Waterproof pH Tester w/large LCD Display

$ 83.6 $ 50.16

VWR 23226-651 23226-654 23226-653 Traceable Conductivity Standard LOT OF 3

$ 67.31 $ 40.38

pH Meter, VWR sympHony SB70P

$ 0.88 $ 0.52

Traceable 4282 Ph Standard,Cert.Ref Material,Crm 10.012

$ 24.88 $ 14.93

Palintest Multiparameter Pocket Sensor – pH, Conductivity, TDS, Salinity, Temp.

$ 278.95 $ 167.37

HACH Sension pH Meter #51700-60

$ 26.4 $ 15.83

Palintest Pocket Sensor – Low Range Conductivity (0 – 1990 μS/cm) PT159

$ 145.19 $ 87.11

Palintest Pocket Sensor – High Range Conductivity (0 – 19.90 mS/cm)

$ 127.6 $ 76.55

AZ9861 Water Quality Analyzers pH Meter Tester with Printer Function AZ-9861

$ 334.4 $ 200.64

Hagan Conductivity Meter *Model BW2*

$ 4.39 $ 2.63

AZ86031 Water Quality Meter PH/Conductivity/Salinity/D.O/TDS Tester all in 1

$ 347.6 $ 208.56

Mettler Toledo FiveEasy pH meter F20 (Totally new in its factory box)

$ 360.8 $ 216.48

New Dynatrol National Corporation DNC 430.4937 Salinity Controller Meter Gauge 1

$ 10.55 $ 6.33

Fisherbrand Hydrus 300 Benchtop pH Meter +Probe Lab

$ 182.87 $ 109.72

+GF+ George Fischer 159-001-367 pH/ORP Amp in Dryloc Electrode Transmitter cable

$ 48.4 $ 29.04

24pk Hanna Instruments pH Meter Calibration Buffer Sachet 4.01pH C91

$ 21.12 $ 12.67

24pk Hanna Instruments pH Meter Calibration Buffer Sachet 7.01pH C92

$ 21.12 $ 12.67

*NEW* Genuine Apera Instruments® EC820 Precision Benchtop Conductivity Meter Kit

$ 640.64 $ 384.38

Leeds & Northrup 117390 pH Measuring Electrode (8 Available)

$ 17.59 $ 10.55

Thermo Scientific ORION 5-Star pH/Cond/DO Portable Meter & CASE AND OTHER STUFF

$ 139.91 $ 83.95

IQ Scientific Instruments IQ240 Potable PH Meter w/ Thermometer sr

$ 35.19 $ 21.11

Rosemount Contacting Conductivity Sensor 0400-12-60

$ 308 $ 184.8

Rosemount Contacting Conductivity Analyzer OXMT-C-HT-11

$ 990 $ 594

HACH Sension pH Meter #51700-60

$ 26.4 $ 15.83

Rosemount pH/ORP Analytical Transmitter XMT-P-HT-11

$ 528 $ 316.8

Oakton Model PH700 PH/mV/Celcius/Fahrenheit Meter Reader For PARTS/REPAIRS

$ 21.68 $ 13

Beckman Phi 720 pH Meter Cat. 143806 ATC Reference RS232 12V DC No PS

$ 7.91 $ 4.74

Thermo Orion 3 Star Benchtop pH Meter

$ 39.59 $ 23.75

Analytical Instruments Benchtop Conductivity Meter Kit NEW

$ 36.08 $ 21.64

Hanna HI 221 Benchtop Calibration Check Microprocessor PH Meter Electrode Holder

$ 21.99 $ 13.19

VWR Scientific 515 Conductivity Dip Cell - cat# 23198-016

$ 114.39 $ 68.63

Thermo Scientific Orion 8155SC Ross Combination pH Electrode, Body: Epoxy, pH

$ 44 $ 26.4

OAKTON 19500-45 Conductivity Probe,316 Stainless Steel

$ 204.38 $ 122.62

Hanna EC/TDS

$ 35.2 $ 21.12

Mettler Toledo FiveEasy FE30 PH Meter

$ 87.12 $ 52.27

Lot 5 Orion 520A Benchtop Temperature PH Meters. Unknown Cond. Look excellent.

$ 79.19 $ 47.51

T171693 Radiometer PHM210 MeterLab Standard pH Meter w/ Beckman Coulter A57186

$ 66 $ 39.6

Horiba 3200459672 Model S070 Replacement Sensor for LAQUAtwin EC-11 EC-22 EC-33

$ 127.6 $ 76.55

Horiba 3200459866 model S021 Replacement Sensor for LAQUAtwin Salt-22

$ 132 $ 79.2

Horiba 3200459869 Model S050 Replacement Sensor for LAQUAtwin Ca-11

$ 132 $ 79.2

Thermo Orion 420A pH meter FOR PARTS AS IS

$ 31.66 $ 18.99

OAKTON WD-35816-77 ALL IN ONE PH ELCTRD W/ ATC

$ 112 $ 67.2

Thermo Scientific Orion 2 Star Portable pH Meter w/ Probe Needs Calibration

$ 74.59 $ 44.75

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

$ 70.19 $ 42.11

Analytical Instruments Benchtop Conductivity Meter Kit NEW

$ 36.08 $ 21.64

Yokogawa PH202S 2-wire type pH / ORP (REDOX) Transmitter W 24 VDC Power Supply

$ 572 $ 343.2

HFS(R) pH and TDS Meter Combo Pen Type pH Meter,TDS EC Temperature Meter

$ 13.81 $ 8.28

Horiba 3200459834 Model S010 Replacement Sensor for LAQUAtwin pH-11 pH-22 pH-33

$ 88 $ 52.8

Corning pH Meter 340 Digital Laboratory Benchtop Portable TESTED & WORKING

$ 21.99 $ 13.19

Handheld Digital pH Meter by Sper Scientific - 840087

$ 67.54 $ 40.52

VWR SympHony SB70P Portable Bench Top pH Meter

$ 30.79 $ 18.47

GLI INTERNATIONAL 63 pH ANALYZER P63A1N1A1A1N - PRE OWNED

$ 131.99 $ 79.19

PAIR of VICI Valco Thermal Conductivity Meters TCD-C TCD2-C

$ 312.39 $ 187.43

NEW HACH HQ2200 Portable pH/ORP/EC/TDS/DO Meter, 2 Inputs, LEV015.53.2200A

$ 1584 $ 950.4

Apera PH800 Laboratory Benchtop pH Meter Kit AI521 NEW

$ 400.4 $ 240.23

American Porta / pH 4 Temperature Meter American Scientific Products Jenco

$ 17.59 $ 10.55

GLI International Model 63 pH Analyzer P63A1N1A1A1NNN

$ 210.32 $ 126.19

Hanna Instrument PH 210 Microprocessor pH Meter AS-IS U

$ 87.12 $ 52.27

Orion Star A211

$ 219.12 $ 131.47

Digital Pocket PH Meter Range -1.00 to 15.00pH Manual Temperature Compensation

$ 126.72 $ 76.03

PH/EC/TDS/TEMP Digital Water Quality/temperature Detection Tester Purity Pen Kit

$ 2.63 $ 1.57

Oakton Con6 Handheld Conductivity TDS Meter

$ 55.16 $ 33.1

TRACEABLE 4288 pH Standard,Cert. Ref Material,PK6

$ 21.13 $ 12.68

1x Water Quality Digital TDS Meter Home Drinking Tap Water Quality Purity Tester

$ 7.85 $ 4.71

TESTERS SALINITY HANNA INSTRUMENTS-

$ 35.2 $ 21.12

Supmea SUP-TDS210 Conductivity meter plus probe sensor

$ 242.88 $ 145.72

Water Quality Meter Benchtop PH Meter mV Temp Tester With 0 to 14 pH Range

$ 277.2 $ 166.32

1x Digital TDS Meter Home Water Quality Drinking Tap Water Quality Purity Tester

$ 7.99 $ 4.79

pH Meter Digital Quality Tester for Household Drinking Water Aquarium Hydroponic

$ 12.31 $ 7.38

Sunmallow TDS & EC, Temperature, Digital Meter (B48A) NEW.

$ 8.79 $ 5.27

Apera Instruments LLC-AI221 SX610 Waterproof pH Pen Tester ±0.1 pH Accuracy 0...

$ 65.96 $ 39.57

DONGRUN INSTRUMENT DR5000 MULTI PARAMETER WATER QUALITY ANALYZER DR5000

$ 1232 $ 739.2

WTW pH 340 Meter 340-A/SET-1/110V with pH-Electrode SenTix 41

$ 923.99 $ 554.39

Xiaomi Mijia TDS Meter Water Tester Quality Purity Portable Detection Test Smart

$ 15.83 $ 9.49

Benchtop pH Meter Lab PH ORP Tester With Temp Display Reset Function ±1999mV

$ 247.1 $ 148.26

TDS 200 Pocket Conductivity Meter - Range 10/1990 ppm

$ 13.19 $ 7.91

22222AZ8603 Water Quality Meter, PH Meter / D.O. / Cond. / Salinity / TDS Tester

$ 439.99 $ 263.99

Mettler Toledo FiveEasy Plus pH meter FP20-Std-Kit (Totally new in its box)

$ 659.12 $ 395.47

MYRON L Company EP Conductivity Meter, Made in USA , Qty : 1pc

$ 189.2 $ 113.52

Nitrate tester with TDS water meter food detector and water tester Ecotester

$ 96.8 $ 58.08

PH/EC/TDS/TEMP Digital Water Quality/Temperature Detection Tester Pen Series

$ 2.25 $ 1.35

EXTECH INSTRUMENTS COND 6+ CONDUCTIVITY/ TEMP TDS 6+ METER KIT & NIST SR-848225

$ 308 $ 184.8

Waterproof PH Meter Tester Temp Meter Portable Water Quality Analyzer -2-19.99pH

$ 154.44 $ 92.66

Industrial PH Meter ORP Controller 0 to 14pH For Water Treatment

$ 170.28 $ 102.16

Handheld Conductivity Meter Temperature Tester 2in1 Memory 99 IrDA Port 8303

$ 155.76 $ 93.45

Digital Water Quality/Temperature Detection Tester Pen Series PH/EC/TDS/TEMP

$ 2.1 $ 1.26

+GF+ George Fischer 159-001-367 pH/ORP Dryloc Electrode Transmitter -NIB

$ 44 $ 26.4

AZ-8601 PH Meter 8601 AZ Dual Display pH/mV & TEMP Brand NEW Free Shipping

$ 115.37 $ 69.22

🔥 Vintage Desco Circuit Tracer MODEL 100 ( CT1-1 ) NEW OLD STOCK 🔥

$ 30.69 $ 18.41

Mettler Toledo FiveEasy Plus pH meter F20 (Totally new in its factory box)

$ 521.84 $ 313.1

6 in 1 Water Quality Monitor PH ORP Conductivity TDS Salinity Resistivity Tester

$ 328.68 $ 197.2

Benchtop Lab PH Meter mV Temperature Tester Water Quality Monitor -2 to 18 Range

$ 360.36 $ 216.21

Lab Conductivity Meter Dissolved Oxygen Meter Temp Tester Water Quality Monitor

$ 538.56 $ 323.13

Conductivity Meter Tester Controller Temp TDS Tester Water Quality Monitor

$ 369.07 $ 221.44

2 In 1 Digital PH ORP Controller Separate Relays Repleaceable Electrode BNC For

$ 137.77 $ 82.66

Conductivity Meter 5 in 1 Benchtop EC TDS Salinity Resistivity Temp Tester

$ 285.12 $ 171.07

Mettler Toledo FiveGo F2 pH meter

$ 308 $ 184.8