pH, Conductivity & TDS Meters | Surplus Network

Geonics EM31 Digital Ground Conductivity Meter

Geonics EM31 Digital Ground...

$9,500.00 CAD

Geonics EM31 Digital Ground...

$9,500.00 CAD

Apera Instruments AI311 Premium Series PH60 Waterproof pH Pocket Tester Kit

Apera Instruments AI311 Premium...

$70.99 USD

Apera Instruments AI311 Premium...

$70.99 USD

Apera Instruments AI314 Premium Series EC60 Waterproof Conductivity/TDS Tester

Apera Instruments AI314 Premium...

$43.99 USD

Apera Instruments AI314 Premium...

$43.99 USD

Extech ExStik PH100 Waterproof pH Meter - Open Box

Extech ExStik PH100 Waterproof pH...

$50.00 USD

Extech ExStik PH100 Waterproof pH...

$50.00 USD

METTLER TOLEDO INLAB 413 52-000-100 ELECTRODE USED IN ORIGINAL BOX-MULTIPLE

METTLER TOLEDO INLAB 413 52-000-100...

$50.00 USD

METTLER TOLEDO INLAB 413 52-000-100...

$50.00 USD

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

Thermo Scientific Orion 8155SC Ross...

$50.00 USD

Thermo Scientific Orion 8155SC Ross...

$50.00 USD

(Thermo) Orion Model 250A+ Portable PH - USED no probe

(Thermo) Orion Model 250A+ Portable...

$55.00 USD

(Thermo) Orion Model 250A+ Portable...

$55.00 USD

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

Acorn ® Ion 6 Meter, Ion, mV, pH,...

$55.00 USD

Acorn ® Ion 6 Meter, Ion, mV, pH,...

$55.00 USD

Hach HQ40D PH/Conductivity Dissolved Oxygen Multi-Parameter Meter - UNTESTED

Hach HQ40D PH/Conductivity Dissolved...

$129.99 USD

Hach HQ40D PH/Conductivity Dissolved...

$129.99 USD

Hanna HI9033 Multi Range Conductivity Meter. Made in Romania HI 9033

Hanna HI9033 Multi Range Conductivity...

$129.99 USD

Hanna HI9033 Multi Range Conductivity...

$129.99 USD

Extech PH100 ExStik pH Waterproof Meter

Extech PH100 ExStik pH Waterproof Meter

$114.96 USD

Extech PH100 ExStik pH Waterproof Meter

$114.96 USD

Apera PH850-DP Portable pH Meter for Dairy Products and Liquid Food

Apera PH850-DP Portable pH Meter for...

$125.99 USD

Apera PH850-DP Portable pH Meter for...

$125.99 USD

YSI ProQuatro Multiparameter Water Quality Meter with Accessories

YSI ProQuatro Multiparameter Water...

$1,500.00 USD

YSI ProQuatro Multiparameter Water...

$1,500.00 USD

Hach DR900 Multiparameter Portable Colorimeter

Hach DR900 Multiparameter Portable...

$850.00 USD

Hach DR900 Multiparameter Portable...

$850.00 USD

READ! Milwaukee Instruments MW801 Digital pH EC TDS COMBO Meter Tester

READ! Milwaukee Instruments MW801...

$60.00 USD

READ! Milwaukee Instruments MW801...

$60.00 USD

🆕️ *LOT OF 4* Leeds & Northrup 117390 pH Measuring Electrode ⚡️🇺🇸 SHIP

🆕️ *LOT OF 4* Leeds & Northrup...

$60.00 USD

🆕️ *LOT OF 4* Leeds & Northrup...

$60.00 USD

Mettler Toledo SG6 SevenGo Pro ph/Ion Meter w/ Sensor

Mettler Toledo SG6 SevenGo Pro ph/Ion...

$295.00 USD

Mettler Toledo SG6 SevenGo Pro ph/Ion...

$295.00 USD

Apera Instruments AI314 Premium Series EC60 Waterproof Conductivity/TDS Tester

Apera Instruments AI314 Premium...

$30.88 USD

Apera Instruments AI314 Premium...

$30.88 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

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

SALE 067 Body pH TEST Tape Paper Roll...

$9.99 USD

SALE 067 Body pH TEST Tape Paper Roll...

$9.99 USD

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

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

$9.99 USD

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

$9.99 USD

HACH HQ40D PORTABLE MULTI-PROBE METER , HC#01

United Arab Emirates

HACH HQ40D PORTABLE MULTI-PROBE METER...

$350.00 USD

HACH HQ40D PORTABLE MULTI-PROBE METER...

$350.00 USD

Fisher Scientific Accumet pH Meter and Accumet Probe

Fisher Scientific Accumet pH Meter...

$350.00 USD

Fisher Scientific Accumet pH Meter...

$350.00 USD

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

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

$11.39 USD

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

$11.39 USD

Oakton pH/CON 500 Benchtop Meter pH/mV/Conductivity/TDS/Temp - ph

Oakton pH/CON 500 Benchtop Meter...

$75.00 USD

Oakton pH/CON 500 Benchtop Meter...

$75.00 USD

MW500 Standard Portable ORP Meter - Milwaukee Instruments No Lead

MW500 Standard Portable ORP Meter -...

$69.95 USD

MW500 Standard Portable ORP Meter -...

$69.95 USD

WTW TetraCon 325 Conductivity cell with built-in temperature sensor - USED

WTW TetraCon 325 Conductivity cell...

$95.00 USD

WTW TetraCon 325 Conductivity cell...

$95.00 USD

HACH DR300 (BCP010317)

HACH DR300 (BCP010317)

$600.00 USD

HACH DR300 (BCP010317)

$600.00 USD

Hach HQ1140 Portable Dedicated Conductivity/TDS Meter

Hach HQ1140 Portable Dedicated...

$800.00 USD

Hach HQ1140 Portable Dedicated...

$800.00 USD

HACH HQ11d Portable pH Meter with Probes, Case & Extras

HACH HQ11d Portable pH Meter with...

$800.00 USD

HACH HQ11d Portable pH Meter with...

$800.00 USD

HM Digital TDS-4 Pocket Size TDS Tester Meter with 0-9990 ppm Measurement Range

HM Digital TDS-4 Pocket Size TDS...

$6.95 USD

HM Digital TDS-4 Pocket Size TDS...

$6.95 USD

Oakton pH 5+ Handheld Meter without Probes 35613-52

Oakton pH 5+ Handheld Meter without...

$90.92 USD

Oakton pH 5+ Handheld Meter without...

$90.92 USD

YSI 550A Handheld Dissolved Oxygen Meter Instrument With Probe

YSI 550A Handheld Dissolved Oxygen...

$180.00 USD

YSI 550A Handheld Dissolved Oxygen...

$180.00 USD

Mettler Toledo SevenMulti pH Meter With Probe

Mettler Toledo SevenMulti pH Meter ...

$325.00 USD

Mettler Toledo SevenMulti pH Meter ...

$325.00 USD

Mettler Toledo Seven Compact S220 pH/Ion Meter

Mettler Toledo Seven Compact S220...

$173.97 USD

Mettler Toledo Seven Compact S220...

$173.97 USD

Hach HQ20 Portable Digital Display Water Analysis Meter W/ Accessories - Used

Hach HQ20 Portable Digital Display...

$299.99 USD

Hach HQ20 Portable Digital Display...

$299.99 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

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

Lot Vtg pHydrion Paper Roll Dispenser pH Dual Roll & Oakite Iron Testing Papers

Lot Vtg pHydrion Paper Roll Dispenser...

$38.00 USD

Lot Vtg pHydrion Paper Roll Dispenser...

$38.00 USD

Milwaukee, Electrode Probe w/ 1m Cable

Milwaukee, Electrode Probe w/ 1m Cable

$88.95 USD

Milwaukee, Electrode Probe w/ 1m Cable

$88.95 USD

PH Meter X002S2YUR3 Range 0.00-14.00

PH Meter X002S2YUR3 Range 0.00-14.00

$10.00 USD

PH Meter X002S2YUR3 Range 0.00-14.00

$10.00 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

VIVOSUN TDS Tester 3-in-1 TDS EC & Temperature Meter Digital TDS Tester

VIVOSUN TDS Tester 3-in-1 TDS EC &...

$11.99 USD

VIVOSUN TDS Tester 3-in-1 TDS EC &...

$11.99 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 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

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

Milwaukee, MW101 Automated Portable pH/Temperature Meter

Milwaukee, MW101 Automated Portable...

$110.95 USD

Milwaukee, MW101 Automated Portable...

$110.95 USD

Milwaukee EC40 EC/TDS Nutrient Meter

Milwaukee EC40 EC/TDS Nutrient Meter

$100.00 USD

Milwaukee EC40 EC/TDS Nutrient Meter

$100.00 USD

T192371 Oakton CON 110 Series Conductivity/TDS Meter w/ Conductivity Probe

T192371 Oakton CON 110 Series...

$100.00 USD

T192371 Oakton CON 110 Series...

$100.00 USD

Mettler Toledo SevenMulti Dual pH/Conductivity Meter

Mettler Toledo SevenMulti Dual...

$399.20 USD

Mettler Toledo SevenMulti Dual...

$399.20 USD

HACH HQ411D Laboratory Single Input Bench Top pH/mV METER ONLY - NICE!

HACH HQ411D Laboratory Single Input...

$375.00 USD

HACH HQ411D Laboratory Single Input...

$375.00 USD

Milwaukee, MW100 Low Cost Portable pH Tester/Meter

Milwaukee, MW100 Low Cost Portable pH...

$98.95 USD

Milwaukee, MW100 Low Cost Portable pH...

$98.95 USD

Milwaukee CD611 Digital Conductivity Pen (EC) for Hydroponics

Milwaukee CD611 Digital Conductivity...

$29.99 USD

Milwaukee CD611 Digital Conductivity...

$29.99 USD

Dr.meter Upgraded High Accuracy Backlit Two-Color LCD Display pH Meter with ATC

Dr.meter Upgraded High Accuracy...

$29.99 USD

Dr.meter Upgraded High Accuracy...

$29.99 USD

Fisher Accumet Meter Model 20 pH Meter with 13-620-16 probe selling for parts

Fisher Accumet Meter Model 20 pH ...

$29.99 USD

Fisher Accumet Meter Model 20 pH ...

$29.99 USD

Milwaukee MC410 PRO Total Dissolved solids (TDS) Monitor

Milwaukee MC410 PRO Total Dissolved...

$109.00 USD

Milwaukee MC410 PRO Total Dissolved...

$109.00 USD

Mettler Toledo SevenExcellence Benchtop pH/mV Meter Multiparameter + Sensor

Mettler Toledo SevenExcellence...

$599.99 USD

Mettler Toledo SevenExcellence...

$599.99 USD

HACH Chemical Co Aime IO Water Tester in case with many pieces

HACH Chemical Co Aime IO Water Tester...

$149.99 USD

HACH Chemical Co Aime IO Water Tester...

$149.99 USD

Milwaukee, SE300 ORP Platinum Electrode, 1m Cable for MW500/SM500

Milwaukee, SE300 ORP Platinum...

$60.95 USD

Milwaukee, SE300 ORP Platinum...

$60.95 USD

VWR Thermo Orion Symphony SP20 Portable Ph Meter

VWR Thermo Orion Symphony SP20...

$89.99 USD

VWR Thermo Orion Symphony SP20...

$89.99 USD

Oakton 3563408 Tds Meter,32 To 122 Degrees,0 To 10 Ppt

Oakton 3563408 Tds Meter,32 To 122...

$86.25 USD

Oakton 3563408 Tds Meter,32 To 122...

$86.25 USD

Jenway 3505 9VAC pH Meter

Jenway 3505 9VAC pH Meter

$349.99 USD

Jenway 3505 9VAC pH Meter

$349.99 USD

Vintage IBM Pocket Conductivity Meter SC51 EC/105 Model 1A Yokogawa Hokushin

Vintage IBM Pocket Conductivity Meter...

$49.95 USD

Vintage IBM Pocket Conductivity Meter...

$49.95 USD

SPER SCIENTIFIC 840035 ADVANCED PH METER

SPER SCIENTIFIC 840035 ADVANCED PH...

$68.00 USD

SPER SCIENTIFIC 840035 ADVANCED PH...

$68.00 USD

Hach HQ40D Multi Meter W/ Protective Case

Hach HQ40D Multi Meter W/ Protective...

$560.99 USD

Hach HQ40D Multi Meter W/ Protective...

$560.99 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 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

Mettler Toledo Seven Excellence Multiparameter PH/MV Ion Conductivity Meter 216C

Mettler Toledo Seven Excellence...

$1,250.00 USD

Mettler Toledo Seven Excellence...

$1,250.00 USD

Milwaukee MW802 Smart 3-in-1 Portable Meter (pH/EC/TDS) ( MW802 )

Milwaukee MW802 Smart 3-in-1 Portable...

$204.95 USD

Milwaukee MW802 Smart 3-in-1 Portable...

$204.95 USD

APERA INSTRUMENTS Value Series PH850 Portable Handheld pH Meter Kit (AI5510)

APERA INSTRUMENTS Value Series PH850...

$170.16 USD

APERA INSTRUMENTS Value Series PH850...

$170.16 USD

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

Hanna Instruments HI 9813-6...

$80.00 USD

Hanna Instruments HI 9813-6...

$80.00 USD

Hach Model 17-J Thymol Blue pH Test Kit M 7.8 - 10.0 pH Catalog 1470-09

Hach Model 17-J Thymol Blue pH Test...

$74.99 USD

Hach Model 17-J Thymol Blue pH Test...

$74.99 USD

Milwaukee MI414 Chloride PRO Photometer for Water Treatment Analysis

Milwaukee MI414 Chloride PRO...

$283.95 USD

Milwaukee MI414 Chloride PRO...

$283.95 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

HANNA DiST®4 Waterproof EC Tester (0.00-20.00 mS/cm) Free Shipping

HANNA DiST®4 Waterproof EC Tester...

$34.99 USD

HANNA DiST®4 Waterproof EC Tester...

$34.99 USD

Thermo Scientific 900100 Reference Electrode Single Junction

Thermo Scientific 900100 Reference...

$99.99 USD

Thermo Scientific 900100 Reference...

$99.99 USD

YSI ProDSS Optical DO Sensor P/N: 626900 NEW and SEALED

YSI ProDSS Optical DO Sensor P/N:...

$700.00 USD

YSI ProDSS Optical DO Sensor P/N:...

$700.00 USD

*TC* THERMO SCIENTIFIC ROSS COMBINATION PH, RUGGED BULB ELECTRODE 8104BN (BNJ36)

*TC* THERMO SCIENTIFIC ROSS...

$56.25 USD

*TC* THERMO SCIENTIFIC ROSS...

$56.25 USD

Hach GLI Pro Series PRO-P3 PH AND ORP Display

Hach GLI Pro Series PRO-P3 PH AND ORP...

$300.00 USD

Hach GLI Pro Series PRO-P3 PH AND ORP...

$300.00 USD

Extech Replacement pH Meter Electrode with Cable 6015WC

Extech Replacement pH Meter Electrode...

$20.00 USD

Extech Replacement pH Meter Electrode...

$20.00 USD

Water Quality Monitor Conductivity Meter TDS Salinity Resistivity Temp Tester

Water Quality Monitor Conductivity...

$200.00 USD

Water Quality Monitor Conductivity...

$200.00 USD

🍀 RARE! Mettler Toledo SevenEasy pH Meter w InLab Expert Pro ISM Electrode

🍀 RARE! Mettler Toledo SevenEasy...

$399.99 USD

🍀 RARE! Mettler Toledo SevenEasy...

$399.99 USD

Hach DR 850 Colorimeter ~ 4845060 ~ w/ Extras

Hach DR 850 Colorimeter ~ 4845060 ~...

$499.00 USD

Hach DR 850 Colorimeter ~ 4845060 ~...

$499.00 USD

Nalco Portable Waterproof Conductivity Meter with Probe 400-C0050.88, 0-2000 uS

Nalco Portable Waterproof...

$299.95 USD

Nalco Portable Waterproof...

$299.95 USD

Oakton 35624-09 Replacement Electrode for PH Tester

Oakton 35624-09 Replacement Electrode...

$34.23 USD

Oakton 35624-09 Replacement Electrode...

$34.23 USD

Extech pH Meter PH100 ExStik Waterproof USED

Extech pH Meter PH100 ExStik...

$40.00 USD

Extech pH Meter PH100 ExStik...

$40.00 USD

Mettler Toledo SevenMulti Conductivity Probe 731 PH Probe Inlab Experts Probe Ex

Mettler Toledo SevenMulti...

$499.99 USD

Mettler Toledo SevenMulti...

$499.99 USD

Standard pH Electrode

Standard pH Electrode

$54.99 USD

Standard pH Electrode

$54.99 USD

Thermo Scientific Orion Dual Star Ph ISE Meter 8102BNUWP 927007MD 256866-A01

Thermo Scientific Orion Dual Star Ph...

$1,435.20 USD

Thermo Scientific Orion Dual Star Ph...

$1,435.20 USD

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

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

$208.99 USD

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

$208.99 USD

Milwaukee MC120 pH Monitor Unit, USA 110V for Aquariums

Milwaukee MC120 pH Monitor Unit, USA...

$104.95 USD

Milwaukee MC120 pH Monitor Unit, USA...

$104.95 USD

Rosemount 54e PH/ORP Analyzer Model# 54EPH/ORP-01

Rosemount 54e PH/ORP Analyzer Model#...

$64.98 USD

Rosemount 54e PH/ORP Analyzer Model#...

$64.98 USD

Milwaukee CD97 Digital Low Range TDS Pen for Water Conditioning Analysis

Milwaukee CD97 Digital Low Range TDS...

$27.00 USD

Milwaukee CD97 Digital Low Range TDS...

$27.00 USD

Apera PH850-DP Portable pH Meter for Dairy Liquid Food & Pool Water Tester Kit

Apera PH850-DP Portable pH Meter for...

$140.00 USD

Apera PH850-DP Portable pH Meter for...

$140.00 USD

pH 7.01 Calibration Buffer 20 ml (Pack of 10) - Hanna Instruments

pH 7.01 Calibration Buffer 20 ml...

$14.39 USD

pH 7.01 Calibration Buffer 20 ml...

$14.39 USD

THERMO SCIENTIFIC ORION 3 STAR PH ISE BENCHTOP INCLUDES PROBE & AC ADAPTER

THERMO SCIENTIFIC ORION 3 STAR PH ISE...

$120.00 USD

THERMO SCIENTIFIC ORION 3 STAR PH ISE...

$120.00 USD

Extech ExStik PH100 Waterproof pH Meter - Tested.

Extech ExStik PH100 Waterproof pH...

$45.00 USD

Extech ExStik PH100 Waterproof pH...

$45.00 USD

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

4 in 1 Digital Water Quality Tester...

$18.99 USD

4 in 1 Digital Water Quality Tester...

$18.99 USD

Oakton WD-35641-51 pH Electrode, Epoxy, Double-Junction, Gel-Filled, 12-mm OD

Oakton WD-35641-51 pH Electrode,...

$85.00 USD

Oakton WD-35641-51 pH Electrode,...

$85.00 USD

Nalco Portable Waterproof Conductivity Meter 400-C0050.88, 0-2000 uS 0-200 mS

Nalco Portable Waterproof...

$199.95 USD

Nalco Portable Waterproof...

$199.95 USD