Shop All pH and Electrochemistry

Calibration Points (ISE)


Dissolved Oxygen (Concentration Range)


Relative Humidity Range


Orion™ Dissolved Oxygen/BOD Probe Thermo Scientific™

Make any pH meter a dissolved oxygen meter with the Thermo Scientific™ Orion™ Dissolved Oxygen/BOD Probe.

Orion™ Calcium Electrodes Thermo Scientific™

Measure calcium in aqueous solutions simply, accurately and economically with Thermo Scientific™ Orion™ Calcium Electrodes.

Russell Quickflush Electrodes Thermo Scientific™

Conduct ISE work or work with dirty/viscous samples using stable, reproducible and non-cloggingThermo Scientific™ Russell Quickflush Electrodes.

Orion™ 2210AM Ammonia Analyzer Thermo Scientific™

Thermo Scientific™ analyzers are designed to provide fast, accurate and reliable online ammonia detection – optimized for drinking water applications that requires critical monitoring of free ammonia. The new Thermo Scientific™ Orion™ 2210AM Ammonia Analyzer is designed to provide continuous and online measurement of free ammonia in drinking water to ensure process treatment optimization. When system efficiency is paramount, ammonia monitoring is a critical measurement. Ammonia levels above 0.1mg/L in water indicate a polluted water source which can lead to drastic environmental effects including marine life and when combined with phosphate will lead to algae blooms.

Orion™ Electrode Adapter Cables Thermo Scientific™

Convert an electrode with one connector to the required connector of another meter by using the Thermo Scientific™ Orion™ Electrode Adapter Cables.

Orion™ Membrane Caps for Polarographic Dissolved Oxygen Probe Thermo Scientific™

Reduce probe servicing time and eliminate assembly problems using Thermo Scientific™ Orion™ Membrane Caps for Polarographic Dissolved Oxygen Probe. Convenient screw-on membrane caps help ensure optimal probe performance.

Orion™ 2100 Series pH ORP and Conductivity Analyzer Thermo Scientific™

Measure pH/ORP and conductivity accurately and reliably in the harshest environments with the Thermo Scientific™ Orion™ 2100 Series pH ORP and Conductivity Analyzer. Designed for the highest accuracy and performance, this analyzer has flexible measurement parameters for single, dual or combined pH ORP. Conductivity inputs are offered with optional digital communications.

Orion™ Resistor Kits and Accessories Thermo Scientific™

Use the Thermo Scientific™ Orion™ Conductivity Resistor Calibration Kit to verify the performance of Thermo Scientific™ Orion™ Versa Star conductivity meters, Thermo Scientific™ Orion™ Star A series conductivity meters and legacy Orion™ Star series conductivity meters. Each conductivity calibration kit includes six resistors that simulate nominal conductance values between 1 µS and 100 mS and have 8 pin MiniDIN connectors.

Orion™ BNC Meter Shorting Strap Thermo Scientific™

Use the Thermo Scientific™ Orion™ BNC Meter Shorting Strap on pH meters with BNC input to perform BNC input verification testing and meter self test.

Orion™ 2111LL Low Level Sodium Analyzer Thermo Scientific™

Protect your turbine against destructive sodium levels, including trace amounts, with the reliable and easy to use Thermo Scientific™ Orion™ 2111LL Low Level Sodium Analyzer. Available in several configurations including the analyzer instrument only, or with a protective enclosure.

Orion™ pH Electrode Filling Solution Thermo Scientific™

Use Thermo Scientific™ Orion™ pH Electrode Filling Solution with pH electrodes and reference electrodes. Packaged as five 2 oz. (5 x 60mL) bottles.

Orion Star™ A211 Benchtop pH Meter Thermo Scientific™

Record accurate and reliable pH, mV, ORP and temperature measurements with the Thermo Scientific™ Orion™ Star A211 pH Benchtop Meter, ideal for a wide range of applications and advanced pH analysis in the lab. Perform up to a five point pH calibration, log up to 2000 data point sets with time / date stamp and easily transfer calibration and data logs via USB or RS232 to a printer or computer with free downloadable Orion™ Star Com software. Use the included electrode stand to easily place sensors in samples and simplify storage to minimize breakage.

Orion™ 1700 Series Analyzer Consumable Kits, Calibration Kits, Reagents and Accessories Thermo Scientific™

Use specifically designed Orion™ 1700 Series Analyzer Consumable Kits, Calibration Kits, Reagents and Accessories with the Orion™ 1700 series analyzers.

Orion™ Versa Star Pro™ Benchtop pH Meter Thermo Scientific™

Get high accuracy, premium performance and ultimate flexibility with the Thermo Scientific™ Orion™ Versa Star Pro™ Benchtop Meter with pH Module. Meet your most challenging applications for pH, mV, ORP and temperature. Easily view measurements on the stunning color display and customize the four meter channels with interchangeable modules. Perform up to a six point pH calibration, log up to 2000 data point sets with time / date stamp and easily transfer calibration and data logs via USB or RS232 to a printer or computer. Use the included electrode stand to easily place sensors in samples.

Orion™ ROSS Ultra™ Glass Triode™ pH/ATC Combination Electrodes Thermo Scientific™

No more waiting for pH readings to stabilize when measuring samples of varying temperatures. Our Thermo Scientific™ Orion™ ROSS Ultra™ Triode™ pH electrodes combine the stability, precision and speed of response of the ROSS Ultra line with integrated temperature measurement. Orion ROSS electrodes contain no Silver or Silver Chloride and incorporate a double-junction design, which protects the sample from contamination and makes the electrodes compatible with TRIS buffers.
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