pH, Conductivity & TDS Meters

ph, conductivity & tds meters — pre-owned

1,714listings

Browse 1,714 ph, conductivity & tds meters — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.

LaMotte WaterLink Spin Touch DW 3585 Digital Photometer (Needs Battery)
UsedBuy It NowBest Offer

LaMotte WaterLink Spin Touch DW 3585 Digital Photometer (Needs Battery)

Customer left this item about two years ago It was in for a battery replacement, but I wasn’t able to acquire the battery at the time. From my knowledge, the item is fully functional. Just needs a new battery. Good cosmetic Any questions feel free to ask

$299.99
Free ShippingRiverhead, US
aleolivo
Feedback
100.0%Excellent· 1.0k
View on eBayOpen listing →
Bluelab Combo Meter pH Conductivity Temperature Tester CM2-1807-0064
UsedBuy It NowBest Offer

Bluelab Combo Meter pH Conductivity Temperature Tester CM2-1807-0064

Bluelab Combo Meter pH Conductivity Temperature Tester CM2-1807-0064

$115.00
+$17.00San Francisco, US
scotdo629
Feedback
100.0%Excellent· 14
View on eBayOpen listing →
Thermo Scientific Orion Star A211 pH Meter with pH Sensor and Probe Arm
-25%
UsedBuy It NowBest Offer

Thermo Scientific Orion Star A211 pH Meter with pH Sensor and Probe Arm

$397.50$530.00-25%

You save $132.50

Free ShippingPonder, US
lifesciencestrading
Feedback
100.0%Excellent· 2.4k
View on eBayOpen listing →
Myron L Company 4P Ultrameter II Water Quality Analyzera
UsedBuy It NowBest Offer

Myron L Company 4P Ultrameter II Water Quality Analyzera

Myron L Company 4P Ultrameter II Water Quality Analyzer You are safe device as pictured tested to power on as shown no further testing done. Ships via USPS

$290.00
See listingHouston, US
luckyp2000
Feedback
99.7%Excellent· 2.0k
View on eBayOpen listing →
HACH Pocket Colorimeter II 58700-06 Phosphate PO4 Tester w/ Case, Manual
UsedBuy It Now

HACH Pocket Colorimeter II 58700-06 Phosphate PO4 Tester w/ Case, Manual

Used with normal wear, powers up and responds to buttons. Comes with what is shown.

$159.99
+$16.50Albuquerque, US
audiounchained
Feedback
99.9%Excellent· 7.0k
View on eBayOpen listing →
Mettler Toledo InPro 3030/150 Combination pH Sensor Probes 52-001-314 - Lot of 2
UsedBuy It NowBest Offer

Mettler Toledo InPro 3030/150 Combination pH Sensor Probes 52-001-314 - Lot of 2

Model: InPro 3030/150 Combination pH Sensor Probe. Includes: 2x pH Sensor Probes. pH Range: 0-14. The unit is in used-functioning condition. It shows light handling marks and minor scuffs on the housing.

$179.00
Free ShippingFairfield, US
misterscientific
Feedback
100.0%Excellent· 2.4k
View on eBayOpen listing →
Waterlink Spin touch Rmn26830
UsedBuy It NowBest Offer

Waterlink Spin touch Rmn26830

tested and working as it should comes with some test disks 17 double packs they say expired in 2023 but they might be able to be used. The Waterlink Spin Touch Rmn26830 is a pH, conductivity, and TDS meter designed for professional use in various industrial settings. With its reliable brand reputation and advanced technology, this meter provides accurate and efficient measurements for water quality testing. Perfect for businesses and professionals in need of precise measurements for their water samples, the Waterlink Spin Touch Rmn26830 offers a convenient and user-friendly solution for ensuring optimal water quality.

$499.00
Free ShippingHermansville, US
hhc.gold_48
Feedback
100.0%Excellent· 2
View on eBayOpen listing →
Hach HQ20 Portable Dissolved Oxygen/pH Meter 51825-60 With Probe, WORKING
UsedBuy It NowBest Offer

Hach HQ20 Portable Dissolved Oxygen/pH Meter 51825-60 With Probe, WORKING

Model: HQ20. Make: Hach. Probe Is Included. Condition: Used / Working / Has Marker Writing On Back Cover. SUM Computers Inc.

$359.94
Free ShippingCommerce City, US
broncos
Feedback
99.7%Excellent· 70.8k
View on eBayOpen listing →
Extech PH220 Waterproof Palm PH Meter With Probe
TOP
UsedBuy It NowBest Offer

Extech PH220 Waterproof Palm PH Meter With Probe

If you are not able to pick up locally, we are able to get competitive freight quotes as well.

$44.99$49.99-10%

You save $5.00

Free ShippingBaroda, US
maverickindustrialsalesTOP
Feedback
100.0%Excellent· 29.1k
View on eBayOpen listing →
Lot of 2x pH Sensor Probes - EasyFerm Plus K8 200 & InPro 3030/150 (Best Offer!)
UsedBuy It NowBest Offer

Lot of 2x pH Sensor Probes - EasyFerm Plus K8 200 & InPro 3030/150 (Best Offer!)

Model: EasyFerm Plus K8 200 & InPro 3030/150 pH Sensor Probes. Includes: 2 pH sensor probes. pH Range: 0 to 14 pH. Functional Testing: Untested, but retrieved from a laboratory in which the unit was functioning.

$129.00
Free ShippingFairfield, US
misterscientific
Feedback
100.0%Excellent· 2.4k
View on eBayOpen listing →
📦
UsedBuy It NowBest Offer

Lot of 3x H EasyFerm Plus VP 160 pH Sensor Probes 238641 (Best Offer!)

Model Number/MPN: 238641. Includes: 3x EasyFerm Plus VP 160 pH Sensor Probes. The lot consists of three Ham EasyFerm Plus VP 160 pH Sensor Probes. The glass components are intact and clear, showing no cracks or significant scratches.

$279.00
Free ShippingFairfield, US
misterscientific
Feedback
100.0%Excellent· 2.4k
View on eBayOpen listing →
METTLER TOLEDO SEVEN MULTI PH CONDUCTIVITY ANALYZER, Ph Meter
UsedBuy It NowBest Offer

METTLER TOLEDO SEVEN MULTI PH CONDUCTIVITY ANALYZER, Ph Meter

Nice Mettler Toledo SevenMulti in good working condition Comes as shown in pictures WITHOUT POWER ADAPTER.

$450.00
+$24.00Quincy, US
lab-bio
Feedback
98.7%Excellent· 861
View on eBayOpen listing →
THERMO ELECTRON CORP ORION 720A+ ISE/pH/mV/ORP
TOP
UsedBuy It NowBest Offer

THERMO ELECTRON CORP ORION 720A+ ISE/pH/mV/ORP

Qty 1- THERMO ELECTRON CORP ORION 720A+ ISE/pH/mV/ORP. P/N: 720A+. (No Hawaii, Alaska, Puerto Rico or anywhere outside the United States). NO EXCEPTIONS!

$49.25
Free ShippingPhoenix, US
vtkphxTOP
Feedback
100.0%Excellent· 19.1k
View on eBayOpen listing →
Denver Instrument Model 250 pH ISE Conductivity Meter
UsedBuy It NowBest Offer

Denver Instrument Model 250 pH ISE Conductivity Meter

$125.00
See listingFriendsville, US
carfore_37
Feedback
99.6%Excellent· 457
View on eBayOpen listing →
Thermo Orion VersaStar Pro Advanced Electrochemistry Meter w/ pH Module
TOP
UsedBuy It NowBest Offer

Thermo Orion VersaStar Pro Advanced Electrochemistry Meter w/ pH Module

Buffers used in the photos pH 10.01, pH 4.01, pH 7.0. pH / Conductivity Probe, AC Adapter. You Will Receive You Will Not Receive - Marks on the display and rubber softkeys, but none will affect how this unit operates.

$209.97$299.95-30%

You save $89.98

Free ShippingSan Diego, US
avr-salesTOP
Feedback
99.6%Excellent· 17.7k
View on eBayOpen listing →
🔥Set Of 2 HACH pH Probe IntelliCAL PHC101 And PHC735 Tested And In Solution
UsedBuy It Now

🔥Set Of 2 HACH pH Probe IntelliCAL PHC101 And PHC735 Tested And In Solution

$295.00
Free ShippingPhoenix, US
copperstatedirect
Feedback
99.1%Excellent· 1.1k
View on eBayOpen listing →
Vintage EB Badger Sons Co Kleinschmidt Water Tester Military Navy Issue Turns On
UsedBuy It NowBest Offer

Vintage EB Badger Sons Co Kleinschmidt Water Tester Military Navy Issue Turns On

Despite its age, the tester is functional and able to provide accurate readings on the purity of water. Turns on, untested otherwise. Military Navy issue. We do not test every port or feature. They can fail unexpectedly.

$229.99
See listingSan Jose, US
frogjog
Feedback
100.0%Excellent· 1.1k
View on eBayOpen listing →
VWR Scientific Vintage Analog pH Meter with Electrode & Temp Compensation
TOP
UsedBuy It NowBest Offer

VWR Scientific Vintage Analog pH Meter with Electrode & Temp Compensation

Item is in good condition.

$69.99$99.99-30%

You save $30.00

Free ShippingChelsea, US
theestatekingsTOP
Feedback
99.6%Excellent· 19.1k
View on eBayOpen listing →
Horiba ES-14 Digital Conductivity Meter - Portable Lab Tester w/ Electrode Probe
UsedBuy It NowBest Offer

Horiba ES-14 Digital Conductivity Meter - Portable Lab Tester w/ Electrode Probe

Excluding Weekends > 1. Serial No (if any) ====================================================================================================================================. Model No Or Type: ES-14.

$144.00
Free ShippingIN
marinemarketin
Feedback
100.0%Excellent· 712
View on eBayOpen listing →
Mettler-Toledo FiveEasy FE20 pH Meter with Probe
UsedBuy It NowBest Offer

Mettler-Toledo FiveEasy FE20 pH Meter with Probe

Nice clean unit. See photos

$115.00
+$12.00Lexington, US
flippy_mcflipperson
Feedback
100.0%Excellent· 4.0k
View on eBayOpen listing →
Hach Test Kit Colorimeter II 58700-18 Manganese LR PAN With Case
UsedBuy It NowBest Offer

Hach Test Kit Colorimeter II 58700-18 Manganese LR PAN With Case

Manufacturer Hach. We are committed to working with you to resolve any issues and make things right. The condition of this item is used and may have dents, scuffs and scratches from normal use. Part Number 58700-18.

$124.99
+$20.00Salisbury, US
sparksman11
Feedback
99.8%Excellent· 28.7k
View on eBayOpen listing →
Mettler Toledo pH/mV Module (Accessory) 30034472
UsedBuy It NowBest Offer

Mettler Toledo pH/mV Module (Accessory) 30034472

$120.00
Free ShippingHanover, US
renewedtech
Feedback
99.7%Excellent· 3.0k
View on eBayOpen listing →
Hach CO2 Test Kit CA-23 Carbon Dioxide 1436-01
-10%
UsedBuy It NowBest Offer

Hach CO2 Test Kit CA-23 Carbon Dioxide 1436-01

This Hach CO2 Test Kit CA-23 Carbon Dioxide 1436-01 is an excellent tool for testing the carbon dioxide levels in your business or industrial setting. It is a reliable and accurate meter that provides quick and efficient results. The kit is designed to measure the pH, conductivity, and TDS of your water, making it a perfect addition to your testing equipment. The Hach CO2 Test Kit CA-23 Carbon Dioxide 1436-01 is manufactured by Hach, a well-known brand in the test, measurement, and inspection industry. This meter is ideal for those in the business and industrial fields who require precise and reliable testing results. With this kit, you can easily monitor your water's carbon dioxide levels and make necessary adjustments to ensure optimal results.

$44.10$49.00-10%

You save $4.90

Free ShippingIndianapolis, US
indyautomation
Feedback
99.5%Excellent· 3.1k
View on eBayOpen listing →
Hach Wide Range pH Test Kit Model 17N | 4.0 - 10.0 pH  1470-11
UsedBuy It Now

Hach Wide Range pH Test Kit Model 17N | 4.0 - 10.0 pH 1470-11

$49.73
See listingHayden, US
burokali
Feedback
100.0%Excellent· 2.2k
View on eBayOpen listing →
Mettler Toledo S220 SevenCompact pH/Ion Benchtop Meter w A/C Adapter
-17%
UsedBuy It Now

Mettler Toledo S220 SevenCompact pH/Ion Benchtop Meter w A/C Adapter

No more accessories included. Manufacturers' warranties and support may not apply. · · · YOU MAY ALSO LIKE · · ·. To learn morewatch our video. We provide work with these communities to provide dental education and services, groceries, and Christmas toys.

$149.40$180.00-17%

You save $30.60

Free ShippingNaperville, US
mycybermarkets
Feedback
99.9%Excellent· 2.3k
View on eBayOpen listing →
Denver Instruments Model: 215 PH Meter (Complete)
TOP
UsedBuy It NowBest Offer

Denver Instruments Model: 215 PH Meter (Complete)

I ran it through several different solutions with known PH levels as well as Millivolt levels. I am always open to new ideas.

$235.65
Free ShippingKokomo, US
chrisminn-9TOP
Feedback
100.0%Excellent· 410
View on eBayOpen listing →
Lot of 3x H EasyFerm Plus PHI Arc 120 pH Sensor Probes 238633-1313 (Best Offer!)
UsedBuy It NowBest Offer

Lot of 3x H EasyFerm Plus PHI Arc 120 pH Sensor Probes 238633-1313 (Best Offer!)

Model: PHI Arc 120 pH Sensor Probe. Includes: 3 pH Sensor Probes. pH Range: 0.14. Temperature Operation: 0-140°C.

$279.00
Free ShippingFairfield, US
misterscientific
Feedback
100.0%Excellent· 2.4k
View on eBayOpen listing →
Thermo Scientific 9107BN Orion Sngl Junction Epoxy Bodied pH/ATC Triode EXP 8/15
TOP
For parts or not workingBuy It Now

Thermo Scientific 9107BN Orion Sngl Junction Epoxy Bodied pH/ATC Triode EXP 8/15

Thermo Scientific 9107BN Orion Sngl Junction Epoxy Bodied pH/ATC Triode exp 8/15. New old stock from plant liquidaiton. Unit expired 8/2015

$49.95
Free ShippingFoley, US
wolfbaysupplyTOP
Feedback
100.0%Excellent· 6.6k
View on eBayOpen listing →
Oakton Waterproof CON 150 Meter with Probe Charger Tested Working Complete
-19%
UsedBuy It NowBest Offer

Oakton Waterproof CON 150 Meter with Probe Charger Tested Working Complete

For full details on proper usage of the item, instruction for fitting and. Certification required before use. patient use. agencies that may be applicable.

$202.48$248.60-19%

You save $46.12

+$29.95Gilbert, US
thisindustrialmarket
Feedback
99.8%Excellent· 2.7k
View on eBayOpen listing →
Hanna HI 221 Calibration Check Microprocessor PH Meter
UsedBuy It NowBest Offer

Hanna HI 221 Calibration Check Microprocessor PH Meter

The Hanna HI 221 Calibration Check Microprocessor PH Meter is a reliable and accurate pH meter designed for professional use in businesses and industries. Manufactured by Hanna, a trusted brand in the industry, this product ensures precise measurements for testing and inspection purposes. With its advanced microprocessor technology, it provides efficient calibration checks to ensure optimal performance. Perfect for monitoring and controlling pH levels in various applications, the Hanna HI 221 Calibration Check Microprocessor PH Meter is a valuable tool for maintaining quality and consistency in industrial processes.

$399.99
See listingAnaheim, US
rolla-biotech
Feedback
100.0%Excellent· 2.1k
View on eBayOpen listing →
Ohaus ST300 Starter 300 Portable Water Conductivity / TDS Meter
UsedBuy It NowBest Offer

Ohaus ST300 Starter 300 Portable Water Conductivity / TDS Meter

Ohaus ST300 Starter 300 Portable Water Conductivity / TDS Meter See all photos for details and condition.

$199.99
+$8.99Orem, US
j4r3d1
Feedback
99.8%Excellent· 3.0k
View on eBayOpen listing →
Thermo Scientific Orion Versa Star Pro Meter Advanced Electrochemistry Meter
-10%
UsedBuy It NowBest Offer

Thermo Scientific Orion Versa Star Pro Meter Advanced Electrochemistry Meter

$85.50$95.00-10%

You save $9.50

See listingBloomingdale, US
smalltownlps
Feedback
100.0%Excellent· 167
View on eBayOpen listing →
Hanna HI 98171 Calibration Check pH/ORP Meter
UsedBuy It NowBest Offer

Hanna HI 98171 Calibration Check pH/ORP Meter

$99.99
Free ShippingFargo, US
itisforsale1999
Feedback
100.0%Excellent· 1.7k
View on eBayOpen listing →
Myron L 6PFCE Ultrameter II Handheld Water Quality Test Meter Instrument J23
UsedBuy It Now

Myron L 6PFCE Ultrameter II Handheld Water Quality Test Meter Instrument J23

$410.39
Free ShippingCromwell, US
thenortongroup
Feedback
99.5%Excellent· 25.6k
View on eBayOpen listing →
Hanna Instruments HI 9813-6 pH / EC / TDS / Temp Waterproof Meter with Case
UsedBuy It NowBest Offer

Hanna Instruments HI 9813-6 pH / EC / TDS / Temp Waterproof Meter with Case

3-in-1 combination probe with pH, EC/TDS, and temperature sensors (HI1285-6).

$120.00
See listingReese, US
stewag_9906
Feedback
100.0%Excellent· 43
View on eBayOpen listing →
METTLER TOLEDO SEVEN COMPACT S220  PH/ION METER W/ PROBE
UsedBuy It Now

METTLER TOLEDO SEVEN COMPACT S220 PH/ION METER W/ PROBE

$269.00
Free ShippingWilmington, US
egan-mark
Feedback
100.0%Excellent· 814
View on eBayOpen listing →
YSI 626902 ProDSS Conductivity and Temperature Sensor - Untested ^
-10%
UsedBuy It Now

YSI 626902 ProDSS Conductivity and Temperature Sensor - Untested ^

No returns. Being sold as is. We are not able to test these types of products. You will receive unit as shown in photos. The YSI 626902 is a digital smart sensor designed for measuring conductivity and temperature using the YSI ProDSS multiparameter water quality meter. It features a welded titanium construction and is compatible with the ProDSS, ProSwap Meter, and ProSwap Logger. Conductivity: Range: 0 to 200 mS/cm. Resolution: 0.001, 0.01 or 0.1 µS/cm (range dependent). Accuracy: ±0.5% of reading or 0.001 mS/cm (0 to 100 mS/cm), ±1% of reading (100 to 200 mS/cm). Temperature: Range: -5 to 70°C. Resolution: 0.1°C. Accuracy: ±0.2°C. Salinity: Range: 0 to 40 ppt. Resolution: 0.01 ppt. Accuracy: 1.0% of reading or 0.1 ppt. See Photos for Details Thank you for viewing out item.

$188.95$209.95-10%

You save $21.00

Free ShippingOley, US
honestproductdeals
Feedback
100.0%Excellent· 8.7k
View on eBayOpen listing →
Thermo Orion Lab Star PH111 pH Meter TESTED with Warranty SEE VIDEO
UsedBuy It NowBest Offer

Thermo Orion Lab Star PH111 pH Meter TESTED with Warranty SEE VIDEO

PH Accuracy ±0.005, ±1 LSD. pH Range -2.000 to 18.000. Lab World Group. With over a decade of industry experience both owners have brought a variety of unique skill sets to The Lab World Group. The Lab World Group has grown from a startup into an entity with a global reach.

$260.00
See listingHudson, US
thelabworldgroup
Feedback
100.0%Excellent· 1.6k
View on eBayOpen listing →
HACH Water Distribution Monitoring Panel Power Supply , 6957700
UsedBuy It Now

HACH Water Distribution Monitoring Panel Power Supply , 6957700

$149.88
+$10.00Little River, US
playerservices
Feedback
99.4%Excellent· 11.3k
View on eBayOpen listing →
Hanna Instruments HI 2210 Benchtop pH Meter + HI1131 With 0.01 pH Resolution Pr
UsedBuy It NowBest Offer

Hanna Instruments HI 2210 Benchtop pH Meter + HI1131 With 0.01 pH Resolution Pr

By placing an. Any misuse.

$359.990
+$14.99Verdugo City, US
medpart
Feedback
100.0%Excellent· 267
View on eBayOpen listing →