pH, Conductivity & TDS Meters
ph, conductivity & tds meters — pre-owned
Browse 1,746 ph, conductivity & tds meters — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.

YSI 650 MDS Handheld Data Logger Display 600XL Multi-Parameter Sonde & Charger
Used YSI 650 MDS Handheld Data Logger Display with 600XL Multi-Parameter Sonde & Charger. Unit is clean and working properly. Unit comes with items seen in pictures, no other items included, Thanks.

Thermo Scientific Orion Star A324 pH Meter Orion Star A324 Bench Meter
Thermo Scientific Orion Star A324 pH Meter Orion Star A324 Bench Meter

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

Mettler Toledo SAG285 /01 Control Module
The Mettler Toledo SAG285 /01 Control Module is a high-quality electronic device designed for precise measurement and control in industrial settings. This product, from the reputable brand Mettler Toledo, is specifically designed for testing pH levels and conductivity in various liquids. With advanced technology and reliability, this control module provides accurate and efficient readings, making it an essential tool for businesses and industries that require precise measurements for quality control and process optimization.

Thermo Scientific Orion Star A211 Benchtop PH Meter ,unit only
Purchase Information: Please note that this product is used. Therefore, some signs of use or minor scratches on the surface are inevitable. However, these cosmetic flaws do not affect the product’s functionality. We sell a wide range of industrial equipment, automation parts, electronic components, and hard-to-find surplus inventory. New items are added regularly, so be sure to follow our store for the latest arrivals. Wholesale orders, bulk purchases, custom sourcing requests, and reasonable offers are always welcome. Please contact us through eBay messages for any questions or inquiries. B01#

Thermo Orion Model 210A pH Meter with Probe
The Orion meter was tested but not calibrated. It appears to be working but it was only partially tested. The probe is functional. Sold as-is. Battery included.

MYRON L 4P Ultrameter II Water Quality Analyzer Tester

Nice tested working Hach Model CL-17 Chlorine Analyzer P/N 5440060
These are from a local utilities upgrade. No other accessories included.

Nice tested working HACH HQ30D flexi PORTABLE MULTI-PROBE METER & case cover

Honeywell 04973-X10-333-X1-00-000-000 Conductivity Cell Cell Sensor Module

Optek C221 Control 200 Conductivity Controller
Item was recently removed from working service and is in excellent working order. Item will come with a 30 Day Warranty. Cosmetically in good condition showing minor scuffs / scratches / blemishes from previous use. Includes Conductivity Controller as pictured. No additional items or accessories are included. Pictures are of one of the actual units available. Inventory is on hand and ready to ship. Please feel free to message us with any questions you may have. .

VWR Scientific Vintage Analog pH Meter with Electrode & Temp Compensation
Item is in good condition.
You save $40.00

Hach DR2800 UNTESTED no power cord
The Hach DR2800 is a reliable brand known for producing high-quality test meters and detectors. This specific model is designed for measuring pH, conductivity, and TDS levels in various industrial and business applications. While the product listed is untested and has no power, it still holds value for individuals looking for a dependable and accurate measurement tool. With its brand reputation and capabilities, the Hach DR2800 is a promising option for those in need of precise measurements in their work environment. Untested unit. No power cord. Was salvaged from a warehouse. Prior company went out of business within 2 years. Unit appears to be slightly used. Packaged with care. No returns

Thermo Scientific Orion 4 Star Portable pH/ISE Meter Orion 4 Star
Thermo Scientific Orion 4 Star Portable pH/ISE Meter Orion 4 Star

Hach DR/850 & DR/890 Colorimeter Lot – Water Testing Meters – Working/one Parts
Sold as untested / parts or repair. Powers on status unknown (no display in photos).

AquaPhoenix HQ11D pH/ORP Meter - HQ11D53000000
Only the device.

Traceable VWR 21800-012 Conductivity Meter With Probe & Travel Case Portable
Portable VWR International 21800-012 VWR Conductivity/Temperature meter sold with case Item #: VAN/21800-012 Manufacturer: Northwest Scientific Inc.
You save $117.00

Pyxis Water analyzer Model SP 710B
Pyxis water analyzer.

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.
You save $89.98

Hach Dr300 Bromine
Hach Dr300 Bromine. Condition is Used. Shipped with USPS Ground Advantage.

Nice used Hach 5500sc Phosphate Low Range Analyzer PO4 3- HR Manual & extras.
Super deal! All taken out of use from a local utility provider here in Colorado Springs. There is also a couple related manuals in the booklet.

Hanna Instruments HI 2211 Benchtop pH/ORP Meter w/ Electrode Arm Tested Working
No probe/electrode is included. Excellent used condition with minimal signs of prior use. Clean housing, clear display, and well-preserved electrode arm. One of the cleaner examples we have encountered.

Hanna Instruments Conductivity Tester HI 98308, Great condition In Box.
Conductivity tester by Hanna Instruments
You save $20.00

*UNTESTED* Thermo Scientific ORION 91-05 Combination pH Electrode - PARTS
Up for sale is a Thermo Scientific ORION 91-05 Combination pH Electrode. This belonged to my uncle and it was in his storage that we're clearing out. Physical condition is good. I strive for the best service possible.

Thermo Scientific Orion 2 Star pH Benchtop Meter Digital Lab Analyzer, Tested
Model: Orion 2 STAR pH Benchtop. Series: Orion Star Series. Features: Integrated Quick Start Guide, Digital LCD, RS232 Port. We work hard to include a lot of pictures of each item. It is also subject to change during peak periods.

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

Thermo Scientific ORION VERSASTAR Pro Meter V18732 & 8172bnwp W/Ph Buffers
See pics for details.

METTLER TOLEDO 8603 SevenMulti PH Conductivity Dual Function Meter POWERS ON BO!
Model Number/MPN: 8603. The plastic housing exhibits slight yellowing due to age and prior use. It does not interfere with screen readability. Unit has been tested for power only.

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

Mettler Toledo SevenEasy Digital pH Meter Tested
Tested and working.

Advantage Controls HT-3P VA Portable Conductivity Meter Tester TDS Water
Unit powers on and display functions as shown in photos. Conductivity Range: 50–20,000 µS/cm. Model: HT-3P VA.

HACH Water Distribution Monitoring Panel Power Supply , 6957700

THERMO SCIENTIFIC 8107BNUMD Orion ROSS Ultra Triode pH/ATC Combination Electrode
The THERMO SCIENTIFIC 8107BNUMD Orion ROSS Ultra Triode pH/ATC Combination Electrode is a reliable and high-quality measurement tool designed for professionals in various industries. With its brand reputation of THERMO SCIENTIFIC, users can trust in the accuracy and precision of the readings obtained from this electrode. This combination electrode allows for the measurement of pH and ATC levels, making it a versatile tool for ensuring the quality and consistency of products or solutions.

Fisherbrand Accumet Liquid-Filled Polymer Body Combination Electrode
Includes: Combination Electrode with Cable.
You save $39.60

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.
You save $5.00

Vinmetrica SC-300 Sulfite & pH/TA Wine Analyzer Kit
Sodium Hydroxide + TA titrant. - pH probe. - 4.01 + 7.00 pH reference solution. - SO2 Acid + SO2 Titrant + SO2 Reactant. - Formaldehyde + YAN neutralizer.

2x Mettler Toledo Combination pH Sensor Probes 405-DPAS-SC-K8S/425 (Best Offer!)
Includes: 2 Combination pH Sensor Probes. Model: Combination pH Sensor Probe. pH Range: 0 to 12.0. Model Number/MPN: 405-DPAS-SC-K8S/425.
You save $19.90

HACH SL1000 Portable Parallel Analyzer with Power Adapter
Used. Tested for power. Display works with no dead pixels. All buttons respond correctly. Includes brand new aftermarket AC adapter. Battery compartment is clean with no corrosion. The the bottom has two broken off screw holes where the nosecone mounts to the unit.

Thermo Scientific Orion Star A222 Conductivity Meter w/ Accessories
The Thermo Scientific Orion Star A222 Conductivity Meter is a high-quality instrument designed for measuring conductivity in various solutions. This meter comes with accessories included, ensuring that users have everything they need to accurately and efficiently perform measurements. With the trusted Thermo Scientific brand behind it, this conductivity meter provides reliable results for a wide range of applications in industries such as water treatment, environmental monitoring, and quality control. Ideal for professionals looking for precision and ease of use in their work.

Hach sensION1 Portable pH Meter 51700-60 w/ Manual
Includes original Hach instruction manual. No working electrode is included. Working status: Powers on; display and keypad (exit, pH/mV, setup, cal, review, arrows, READ/enter) all function. The probe connector pins are intact and clean (see close-up photo).