pH, Conductivity & TDS Meters | Surplus Network

4 in 1 Digital Water Quality Tester TDS/EC/PH/TEMP Meter Test Filter Pen US

4 in 1 Digital Water Quality Tester...

$15.99 USD

4 in 1 Digital Water Quality Tester...

$15.99 USD

eSeasongear SALT-3000 Meter Digital NaCl Salinity ppm Tester for Pool & Koi Pond

eSeasongear SALT-3000 Meter Digital...

$15.99 USD

eSeasongear SALT-3000 Meter Digital...

$15.99 USD

HACH DR300 pocket colorimeter 8 7 4a

HACH DR300 pocket colorimeter ...

$265.00 USD

HACH DR300 pocket colorimeter ...

$265.00 USD

Oakton - WD-35613-52 pH 5+ Handheld Meter with pH Probe

Oakton - WD-35613-52 pH 5+ Handheld...

$340.00 USD

Oakton - WD-35613-52 pH 5+ Handheld...

$340.00 USD

HACH POCKET PRO+ PH TESTER/THERMOMETER

HACH POCKET PRO+ PH TESTER/THERMOMETER

$75.00 USD

HACH POCKET PRO+ PH TESTER/THERMOMETER

$75.00 USD

Rosemount Analytical Solu Comp II 1055-01-10-20 Guaranteed

Rosemount Analytical Solu Comp II...

$75.00 USD

Rosemount Analytical Solu Comp II...

$75.00 USD

Extech ExStik PH100 Waterproof pH...

$95.00 USD

Extech ExStik PH100 Waterproof pH...

$95.00 USD

Hanna Instruments HI 9813-6 PH/EC/TDS/temp. Meter

Hanna Instruments HI 9813-6...

$95.00 USD

Hanna Instruments HI 9813-6...

$95.00 USD

DANOPLUS Smart pH ORP Controller with Remote App Monitoring & Dosing in Water, 3

DANOPLUS Smart pH ORP Controller with...

$145.33 USD

DANOPLUS Smart pH ORP Controller with...

$145.33 USD

OAKTON Acorn Ion 6 Meter, Ion, mV, pH, °C, Temperature, Protective Boot Stand.

OAKTON Acorn Ion 6 Meter, Ion, mV,...

$49.50 USD

OAKTON Acorn Ion 6 Meter, Ion, mV,...

$49.50 USD

Apera Instruments AI311 Premium Series PH60 Waterproof pH Pocket Tester Kit

Apera Instruments AI311 Premium...

$79.99 USD

Apera Instruments AI311 Premium...

$79.99 USD

OPEN BOX New Milwaukee MW500 ORP Meter, BLUE Model

OPEN BOX New Milwaukee MW500 ORP...

$79.99 USD

OPEN BOX New Milwaukee MW500 ORP...

$79.99 USD

HACH 9531000 POCKET PRO+ PH TESTER **with Buffer 7 Packet

HACH 9531000 POCKET PRO+ PH TESTER...

$70.00 USD

HACH 9531000 POCKET PRO+ PH TESTER...

$70.00 USD

HM Digital COM-100 TDS EC Temp Waterproof Combo Meter Tester Conductivity

HM Digital COM-100 TDS EC Temp...

$39.99 USD

HM Digital COM-100 TDS EC Temp...

$39.99 USD

Apera EC60-Z Smart Bluetooth Conductivity EC/TDS/Sal/Res Tester KIT for Water.

Apera EC60-Z Smart Bluetooth...

$88.00 USD

Apera EC60-Z Smart Bluetooth...

$88.00 USD

VIVOSUN Soil Tester, 3-in-1 Plant Moisture Meter Light PH Tester

VIVOSUN Soil Tester, 3-in-1 Plant...

$8.99 USD

VIVOSUN Soil Tester, 3-in-1 Plant...

$8.99 USD

PH Meter, TDS&EC PPM Meter Water Tester for Household Drinking,Pool and Aquarium

PH Meter, TDS&EC PPM Meter Water...

$8.99 USD

PH Meter, TDS&EC PPM Meter Water...

$8.99 USD

7in1 PH/ORP/EC/TEMP/SALT/S.G/TDS Digital LCD Water Quality Tester Meter Detector

7in1 PH/ORP/EC/TEMP/SALT/S.G/TDS...

$21.44 USD

7in1 PH/ORP/EC/TEMP/SALT/S.G/TDS...

$21.44 USD

Atlas Scientific PH Probe

Atlas Scientific PH Probe

$25.00 USD

Atlas Scientific PH Probe

$25.00 USD

Oakton CON 2700 Benchtop Conductivity Meter with Power Supply

Oakton CON 2700 Benchtop Conductivity...

$122.95 USD

Oakton CON 2700 Benchtop Conductivity...

$122.95 USD

ORION 3 STAR HANDHELD PH METER UNITS IN BOXES PLEASE READ DESCRIPTION

ORION 3 STAR HANDHELD PH METER UNITS...

$19.95 USD

ORION 3 STAR HANDHELD PH METER UNITS...

$19.95 USD

Extech PH220-C PH Meter With TWO Electrodes 6015WC

Extech PH220-C PH Meter With TWO...

$150.00 USD

Extech PH220-C PH Meter With TWO...

$150.00 USD

Yokogawa FU20 Widebody Type pH/ORP Sensor FU20-05-T1-NPT *Tab Broken

Yokogawa FU20 Widebody Type pH/ORP...

$150.00 USD

Yokogawa FU20 Widebody Type pH/ORP...

$150.00 USD

NANOLUX OG Series 1000 W Digital Electronic Grow Ballast w/ Cord NEW FREE SHIP

NANOLUX OG Series 1000 W Digital...

$150.00 USD

NANOLUX OG Series 1000 W Digital...

$150.00 USD

^^ OAKTON PC650 600 Series Waterproof Portable Meter (CZU26)

^^ OAKTON PC650 600 Series Waterproof...

$150.00 USD

^^ OAKTON PC650 600 Series Waterproof...

$150.00 USD

Hanna Instruments HI9813-61 pH/EC/TDS/Temperature meter with CAL Check

Hanna Instruments HI9813-61...

$129.99 USD

Hanna Instruments HI9813-61...

$129.99 USD

Apera Premium Series ORP60 Pocket ORP Tester

Apera Premium Series ORP60 Pocket ORP...

$30.00 USD

Apera Premium Series ORP60 Pocket ORP...

$30.00 USD

EXTECH INSTRUMENTS RE300 ExStik ORP Meter

EXTECH INSTRUMENTS RE300 ExStik ORP...

$30.00 USD

EXTECH INSTRUMENTS RE300 ExStik ORP...

$30.00 USD

Fisher Accumet Basic AB15H Meter Kit 1363AB15: OEM PS Arm Electrode Probe Docs

Fisher Accumet Basic AB15H Meter Kit...

$275.00 USD

Fisher Accumet Basic AB15H Meter Kit...

$275.00 USD

Milwaukee EC60 PRO Waterproof 3-in-1 EC / TDS/Temp Tester with Replaceable Probe

Milwaukee EC60 PRO Waterproof 3-in-1...

$61.00 USD

Milwaukee EC60 PRO Waterproof 3-in-1...

$61.00 USD

Milwaukee EC59 PRO Waterproof 3-in-1 Conductivity / TDS & Temperature Tester

Milwaukee EC59 PRO Waterproof 3-in-1...

$61.00 USD

Milwaukee EC59 PRO Waterproof 3-in-1...

$61.00 USD

Milwaukee T76 Waterproof High Range Total Dissolved Solids Pen (TDS)

Milwaukee T76 Waterproof High Range...

$38.00 USD

Milwaukee T76 Waterproof High Range...

$38.00 USD

VIVOSUN 3 in 1 Digital Soil Tester Sunlight Soil Moisture Water PH Garden Plant

VIVOSUN 3 in 1 Digital Soil Tester...

$8.54 USD

VIVOSUN 3 in 1 Digital Soil Tester...

$8.54 USD

iSpring TDS2 2-Button Digital Water Quality TDS Test Meter with Backlit LCD

iSpring TDS2 2-Button Digital Water...

$16.14 USD

iSpring TDS2 2-Button Digital Water...

$16.14 USD

YSI 556 MPS Water Quality Meter Probe

YSI 556 MPS Water Quality Meter Probe

$300.00 USD

YSI 556 MPS Water Quality Meter Probe

$300.00 USD

Milton Roy DC4000-1 Liquitron Conductivity Controller

Milton Roy DC4000-1 Liquitron...

$300.00 USD

Milton Roy DC4000-1 Liquitron...

$300.00 USD

Hach SensION3 (51750-60) pH Meter w/Power Supply - NO PROBE

Hach SensION3 (51750-60) pH Meter...

$69.00 USD

Hach SensION3 (51750-60) pH Meter...

$69.00 USD

💥THERMO SCIENTIFIC ORION STAR A111 BENCHTOP PH METER W/ PROBE STAND

💥THERMO SCIENTIFIC ORION STAR A111...

$233.99 USD

💥THERMO SCIENTIFIC ORION STAR A111...

$233.99 USD

2x TDS Meter PPM/EC/TEMP Meter Digital Backlit Water Quality Tester Light Alarm

2x TDS Meter PPM/EC/TEMP Meter...

$11.99 USD

2x TDS Meter PPM/EC/TEMP Meter...

$11.99 USD

Digital pH Meter PPM,TDS&EC Water Quality Tester,±0.01pH for Home Lab WHOLE SALE

Digital pH Meter PPM,TDS&EC Water...

$11.99 USD

Digital pH Meter PPM,TDS&EC Water...

$11.99 USD

SALE 067 Body pH TEST Tape Paper Roll 4 Saliva & Urine Acid 5.5 Alkaline Health

SALE 067 Body pH TEST Tape Paper Roll...

$10.99 USD

SALE 067 Body pH TEST Tape Paper Roll...

$10.99 USD

LCD Digital Water Quality Tester TDS EC/PH/PH PH Paper Meter&TEMP Swimming Pools

LCD Digital Water Quality Tester TDS...

$9.99 USD

LCD Digital Water Quality Tester TDS...

$9.99 USD

HACH HQ40D PORTABLE MULTI-PROBE METER , HC#266

United Arab Emirates

HACH HQ40D PORTABLE MULTI-PROBE METER...

$550.00 USD

HACH HQ40D PORTABLE MULTI-PROBE METER...

$550.00 USD

THERMO SCIENTIFIC ORION 9512 Ammonia Electrode

THERMO SCIENTIFIC ORION 9512 Ammonia...

$84.99 USD

THERMO SCIENTIFIC ORION 9512 Ammonia...

$84.99 USD

THERMO SCIENTIFIC ORION 9512HPBNWP Ammonia Electrode 9512

THERMO SCIENTIFIC ORION 9512HPBNWP...

$84.99 USD

THERMO SCIENTIFIC ORION 9512HPBNWP...

$84.99 USD

REED Instruments R3530-ELECTRODE Conductivity/TDS/Salinity Electrode

REED Instruments R3530-ELECTRODE...

$39.00 USD

REED Instruments R3530-ELECTRODE...

$39.00 USD

PH Calibration Buffer (Combo Pack) 4.0, 7.0, 10.0 - Hanna Instruments

PH Calibration Buffer (Combo Pack)...

$5.97 USD

PH Calibration Buffer (Combo Pack)...

$5.97 USD

Charging Dock For Hach Sension Portable Conductivity pH Meter P/N: 5187560

Charging Dock For Hach Sension...

$49.99 USD

Charging Dock For Hach Sension...

$49.99 USD

Milwaukee MI408 Iron High Range PRO Photometer for Water Analysis

Milwaukee MI408 Iron High Range PRO...

$279.70 USD

Milwaukee MI408 Iron High Range PRO...

$279.70 USD

Milwaukee MW802 PRO 3-in-1 pH, EC, TDS Combo Meter with ATC with Hard Carrying C

Milwaukee MW802 PRO 3-in-1 pH, EC,...

$268.00 USD

Milwaukee MW802 PRO 3-in-1 pH, EC,...

$268.00 USD

Orion Portable Ph Meter Model 290 A With Case

Orion Portable Ph Meter Model 290 A...

$85.00 USD

Orion Portable Ph Meter Model 290 A...

$85.00 USD

Nalco Conductivity Meter Probe 500-R1342.88, for 400-C0050.88 & 400-C0055.88

Nalco Conductivity Meter Probe...

$159.95 USD

Nalco Conductivity Meter Probe...

$159.95 USD

Myron L Company 750II Conductivity Monitor 115/230V-50/60Hz

Myron L Company 750II Conductivity...

$90.00 USD

Myron L Company 750II Conductivity...

$90.00 USD

Schott Instruments Lab 860 PH Meter

Schott Instruments Lab 860 PH Meter

$199.00 USD

Schott Instruments Lab 860 PH Meter

$199.00 USD

Milwaukee MW301 PRO Conductivity Meter

Milwaukee MW301 PRO Conductivity Meter

$136.00 USD

Milwaukee MW301 PRO Conductivity Meter

$136.00 USD

2x TDS Meter 0-9990ppm Tap Drinking Water Purity Quality Tester Agile Electrode

2x TDS Meter 0-9990ppm Tap Drinking...

$7.99 USD

2x TDS Meter 0-9990ppm Tap Drinking...

$7.99 USD

SciLog SciCon Conductivity Monitor with Cond/Temp Flow Cell 080-599PSX

SciLog SciCon Conductivity Monitor...

$299.00 USD

SciLog SciCon Conductivity Monitor...

$299.00 USD

New Mettler Toledo 405-DPAS-SC-K8S/225 PH Probe

New Mettler Toledo...

$324.99 USD

New Mettler Toledo...

$324.99 USD

Fisher Accumet Basic AB15H Meter Kit 1363AB15 w/ OEM PS Arm Electrode Probe Docs

Fisher Accumet Basic AB15H Meter Kit...

$215.00 USD

Fisher Accumet Basic AB15H Meter Kit...

$215.00 USD

HACH MODEL DR/890 PORTABLE HANDHELD DIGITAL WATER COLORIMETER (Free Shipping)

HACH MODEL DR/890 PORTABLE HANDHELD...

$649.00 USD

HACH MODEL DR/890 PORTABLE HANDHELD...

$649.00 USD

Thermo Scientific STARA2110 -2 to 20 pH Range pH Benchtop Meter

Thermo Scientific STARA2110 -2 to 20...

$217.99 USD

Thermo Scientific STARA2110 -2 to 20...

$217.99 USD

4 in 1 Digital LCD PH/TDS/EC/TEMP Water Quality Tester Meter Pen Monitor USA

4 in 1 Digital LCD PH/TDS/EC/TEMP...

$18.99 USD

4 in 1 Digital LCD PH/TDS/EC/TEMP...

$18.99 USD

Hanna HI 1311 Glass Bodied Refillable Laboratory Combination pH electrode probe

Hanna HI 1311 Glass Bodied Refillable...

$89.50 USD

Hanna HI 1311 Glass Bodied Refillable...

$89.50 USD

Extech PH220-C Waterproof Palm pH Meter with Cabled Electrode Cable Electrode

Extech PH220-C Waterproof Palm pH...

$159.00 USD

Extech PH220-C Waterproof Palm pH...

$159.00 USD

LCD Backlit TDS Water Quality Tester 3 in 1 TDS / EC / TEMP Meter

LCD Backlit TDS Water Quality Tester ...

$8.07 USD

LCD Backlit TDS Water Quality Tester ...

$8.07 USD

At-Home Drinking Water Test Tool Quality Rapid TDS Meter Analyzer Kit Gauge Tap

At-Home Drinking Water Test Tool...

$7.95 USD

At-Home Drinking Water Test Tool...

$7.95 USD

Ohaus St20 Ph Pen,Dual Line Lcd

Ohaus St20 Ph Pen,Dual Line Lcd

$96.19 USD

Ohaus St20 Ph Pen,Dual Line Lcd

$96.19 USD

HACH 9180100 Filter Housing

HACH 9180100 Filter Housing

$145.79 USD

HACH 9180100 Filter Housing

$145.79 USD

Fisher Scientific Accumet Basic pH/MV Meter 725-037

Fisher Scientific Accumet Basic pH/MV...

$44.55 USD

Fisher Scientific Accumet Basic pH/MV...

$44.55 USD

R194605 Thermo Scientific Orion Star A211 pH Meter

R194605 Thermo Scientific Orion Star...

$100.00 USD

R194605 Thermo Scientific Orion Star...

$100.00 USD

Milwaukee CD611 Digital Conductivity Pen (EC) for Hydroponics

Milwaukee CD611 Digital Conductivity...

$29.99 USD

Milwaukee CD611 Digital Conductivity...

$29.99 USD

Lot of 3 Thermo Scientific Orion Probes pH ATC 927005MD 9157BNMD 927007MD

Lot of 3 Thermo Scientific Orion...

$129.00 USD

Lot of 3 Thermo Scientific Orion...

$129.00 USD

Denver Instruments Model 215 pH Meter

Denver Instruments Model 215 pH Meter

$69.99 USD

Denver Instruments Model 215 pH Meter

$69.99 USD

Yokogawa EXA PH402G-E-1-E pH/ORP Converter Analyzer

Yokogawa EXA PH402G-E-1-E pH/ORP...

$91.95 USD

Yokogawa EXA PH402G-E-1-E pH/ORP...

$91.95 USD

Thermo Scientific Orion 3 Star Portable PH Meter 6V

Thermo Scientific Orion 3 Star...

$104.45 USD

Thermo Scientific Orion 3 Star...

$104.45 USD

Thermo ORION STAR LogR pH Benchtop Meter

Thermo ORION STAR LogR pH Benchtop Meter

$149.95 USD

Thermo ORION STAR LogR pH Benchtop Meter

$149.95 USD

Pulsatron Model LB03SA-VTC1-U03 Pump

Pulsatron Model LB03SA-VTC1-U03 Pump

$134.99 USD

Pulsatron Model LB03SA-VTC1-U03 Pump

$134.99 USD

Pulsatron Model LB02SA-VTC1-U03 Pump

Pulsatron Model LB02SA-VTC1-U03 Pump

$134.99 USD

Pulsatron Model LB02SA-VTC1-U03 Pump

$134.99 USD

Nalco pH/mV/°C Probe 500-R1340.88, -2 to 16 pH, for Meter 400-C0060.88

Nalco pH/mV/°C Probe 500-R1340.88,...

$139.95 USD

Nalco pH/mV/°C Probe 500-R1340.88,...

$139.95 USD

Thermo Orion ATC pH Probe - Unused in Box TESTED with Warranty

Thermo Orion ATC pH Probe - Unused in...

$99.00 USD

Thermo Orion ATC pH Probe - Unused in...

$99.00 USD

Myron L meter Ultrapen (EC)/TDS/Salinity Pen Item # PT1

Myron L meter Ultrapen...

$231.00 USD

Myron L meter Ultrapen...

$231.00 USD

Milwaukee MW801 PRO 3-in-1 Low Range pH, EC, TDS Combo Meter with ATC

Milwaukee MW801 PRO 3-in-1 Low Range...

$231.00 USD

Milwaukee MW801 PRO 3-in-1 Low Range...

$231.00 USD

Untested EMS II Marker Locator And YSI 3500 Water Quality Monitor Surplus

Untested EMS II Marker Locator And...

$44.99 USD

Untested EMS II Marker Locator And...

$44.99 USD

Hanna DiST 4 (HI 98304) Conductivity Tester - mS/cm Readout

Hanna DiST 4 (HI 98304) Conductivity...

$29.00 USD

Hanna DiST 4 (HI 98304) Conductivity...

$29.00 USD

YSI 3200 Conductivity Instrument w/power Cord, Manual (NO PROBE)

YSI 3200 Conductivity Instrument...

$125.00 USD

YSI 3200 Conductivity Instrument...

$125.00 USD

TURCK RKV 4,5T-7.7 RSV 4,5T/S90/S653 EUROFAST 25

TURCK RKV 4,5T-7.7 RSV 4,5T/S90/S653...

$41.14 USD

TURCK RKV 4,5T-7.7 RSV 4,5T/S90/S653...

$41.14 USD

Digital 4 in1 or 3 in 1 Water Quality Tester Pen TDS/EC/PH/Temperature Meter

Digital 4 in1 or 3 in 1 Water Quality...

$21.40 USD

Digital 4 in1 or 3 in 1 Water Quality...

$21.40 USD

NEW ORION 210Aplus Portable PH Meter W/ Instruction Manual Fast Shipping

NEW ORION 210Aplus Portable PH...

$80.00 USD

NEW ORION 210Aplus Portable PH...

$80.00 USD

*ZEROWATER CULLIGAN TDS DIGITAL METER TESTER OEM ZERO WATER REPLACEMENT*

*ZEROWATER CULLIGAN TDS DIGITAL METER...

$10.00 USD

*ZEROWATER CULLIGAN TDS DIGITAL METER...

$10.00 USD

Orion Portable Ph Meter Model 290 A With Case

Orion Portable Ph Meter Model 290 A...

$99.99 USD

Orion Portable Ph Meter Model 290 A...

$99.99 USD

Mettler Toledo SevenEasy PH Conductivity Meter w/ AC Adapter & Stand

Mettler Toledo SevenEasy PH...

$179.00 USD

Mettler Toledo SevenEasy PH...

$179.00 USD

Apera PH700 Benchtop Lab pH Meter 0.01 Accuracy with 3-in-1 pH/Temp. Electrode

Apera PH700 Benchtop Lab pH Meter...

$149.99 USD

Apera PH700 Benchtop Lab pH Meter...

$149.99 USD

Hach 52250-60 Ice-pic 20 NTU calibration verification module with carry case

Hach 52250-60 Ice-pic 20 NTU...

$218.69 USD

Hach 52250-60 Ice-pic 20 NTU...

$218.69 USD

Hach DRB 200 Dual Digital Reactor Block Parts Only

Hach DRB 200 Dual Digital Reactor...

$249.99 USD

Hach DRB 200 Dual Digital Reactor...

$249.99 USD

Pocket Digital pH Meter Tester Pen 0.05pH - ATC Waterproof for Pool Aquarium Lab

Pocket Digital pH Meter Tester Pen...

$10.32 USD

Pocket Digital pH Meter Tester Pen...

$10.32 USD

Extech 601500 Standard pH Electrode

Extech 601500 Standard pH Electrode

$52.82 USD

Extech 601500 Standard pH Electrode

$52.82 USD

Digital PH/TDS/EC/Temp Meter Water Quality Monitor Tester 4-in-1 pH Tester

Digital PH/TDS/EC/Temp Meter Water...

$14.84 USD

Digital PH/TDS/EC/Temp Meter Water...

$14.84 USD

HACH 2100q portable turbidimeter - PARTS / REPAIR - Does not power on

HACH 2100q portable turbidimeter -...

$249.95 USD

HACH 2100q portable turbidimeter -...

$249.95 USD

Conductivity Meter Tester

Conductivity Meter Tester

$25.95 USD

Conductivity Meter Tester

$25.95 USD

^^ Thermo Scientific Orion Star A211 pH Benchtop Meter -no battery cover (GRM87)

^^ Thermo Scientific Orion Star A211...

$112.50 USD

^^ Thermo Scientific Orion Star A211...

$112.50 USD