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Conductivity Probes, Accessories and Solutions
Ensure consistent and accurate conductivity, resistivity, total dissolved solids (TDS) and salinity measurements with Orion conductivity probes. Thermo Scientific Orion DuraProbe 4-Electrode Cell Lab and Field applications provide the highest accuracy for demanding laboratory or field applications with durable and chemically resistant materials; ideal for high and standard conductivity samples and difficult samples such as wastewater, runoff water, and mud. Orion 2-Electrode Cell Probes can measure low, standard, and high conductivity samples, depending on the cell constant. Glass/platinum cells are the best for chemically reactive conductivity samples, since the cell material is highly chemical resistant.
Benefits of 2-electrode and 4-electrode conductivity probes
| Orion 2-Electrode Cells | DuraProbe 4-Electrode Cells |
|---|---|
Orion 2-Electrode Cells are able to measure low, standard, and high conductivity samples, depending on the cell constant. Cells with a 0.1cm-1 cell constant are ideal for low ionic strength solutions, deionized water, and ultra pure water. Glass/platinum cells are the best for chemically reactive conductivity samples, since the cell material is highly chemical resistant. | DuraProbe 4-Electrode Cells provide the highest accuracy for demanding laboratory or field applications. The 4 electrode design compensates for electrode fouling, cable and connector resistance, polarization errors, and fringe field interference errors. The epoxy/graphite cell material is extremely durable and chemically resistant. DuraProbe conductivity cells are ideal for high and standard conductivity samples and difficult samples such as wastewater, runoff water, and mud. |
| The stainless steel body 2-Electrode cell is perhaps our top seller | All have durable epoxy bodies |
| The stainless steel cell is best for ultra pure water measurements | No error from cable resistance, allowing for longer cable lengths |
| Multiple cell materials available - graphite, platinum or stainless steel | Minimum effect on accuracy from electrode polarization and contamination |
| Different cells designed to measure multiple specific ranges | Wide measurement range |
| Option for flow cell or flow-through design | Unaffected by deposits on cell surface |
| Dry cell storage is an added benefit of these conductivity probes | |
Featured conductivity probes | View all |
| DuraProbe 4-Electrode Cells for Lab and Field | Orion 2-Electrode Cells Lab and Field | Orion 2-Electrode Cells, Ultra Pure | |
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| Applications |
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| Measurement range | 1 µS ‒ 200 mS/cm | 10 µS ‒ 200 mS/cm | 0.01 ‒ 300 µS/cm |
| Nominal constant (K) | 0.475 cm-1 | 1.0 cm-1 | 1.0 cm-1 |
| Body and cell material | Epoxy body Graphite cell | Epoxy body Graphite cell | Stainless steel body V4A cell |
| Min/max immersion depth | 35 mm min - no max | ||
| Meter compatibility | Star Series bench and portable meters | ||
Selecting your conductivity probe
Compatible with Orion Star and Versa Star bench meters and Orion Star portable meters.
| Measurement range | Nominal constant | Cable length | Built-in temperature compensation | Rugged design | Materials | |
1 µS ‒ 200 mS/cm | 0.475 cm-1 | 1.5 m | ✓ | ✓ | Epoxy body Graphite cell | |
1 µS ‒ 200 mS/cm | 0.475 cm-1 | 3 m | ✓ | ✓ | Epoxy body Graphite cell | |
1 µS ‒ 200 mS/cm | 0.475 cm-1 | 6 m | ✓ | ✓ | Epoxy body Graphite cell | |
0.1 µS ‒ 100 mS/cm | 0.475 cm-1 | 10 m | ✓ | ✓ | Epoxy body Graphite cell | |
10 µS ‒ 200 mS/cm | 0.55 cm-1 | 1.5 m | ✓ |
| Epoxy body Graphite cell | |
0 μS/cm to 200 mS/cm |
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| ✓ | ✓ | Epoxy body Stainless steel | |
0.1 µS ‒ 100 mS/cm | 0.1 cm-1 | 1 m | ✓ |
| Glass body Platinum cell | |
0.01 ‒ 300 µS/cm | 0.1 cm-1 | 1.5 m | ✓ |
| Stainless steel body V4A cell | |
1 µS ‒ 200 mS/cm | 1.0 cm-1 | 1 m | ✓ |
| Glass body with platinum cell | |
1 µS ‒ 20 mS/cm | 1.0 cm-1 | 1.5 m | ✓ |
| Epoxy body with platinum cell | |
10 µS ‒ 200 mS/cm | 1.0 cm-1 | 3 m | ✓ | ✓ | Epoxy body with graphite cell | |
10 µS ‒ 2,000 mS/cm | 10 cm-1 | 1.5 m | ✓ |
| Glass body with platinum cell |
*A variation of this model is available for compatibility with meters that require BNC connections.
**Uses a BNC connection. Requires on Orion Electrode Adapter Cable for use with Orion Star and Versa Star meters.
Accurately perform USP<645> conductivity methods
Being able to validate the water quality in purified water samples is critical in many industries. Conductivity testing can be a useful indicator in determining water quality and is more reliable and more convenient than wet chemistry tests. Three stages of conductivity testing are described by the United States Pharmacopeia (USP)—each more involved than the last. Being prepared with the right workflows and supplies may seem complicated, but with Thermo Scientific™ Orion™ products and support, you’ll have everything you need to master USP<645> in no time.
Discover the instruments and solutions that will prepare you for this regulation by reading the application note: Measuring the Conductivity of Pure Water Using USP <645>.
| Accessory | For use with | Description |
Use to help maintain the probe bulb and keep it free of corrosion | ||
Versa Star Pro and Orion Star A conductivity meters with miniDIN connector
| Verify the performance of your conductivity meters with the resistor kit. | |
Orion 2-Electrode Cell Ultra-Pure Probes for ultra-pure water (Cat. Nos. 013016A, 013016D, and 013016MD) | Flow cell ensures a continuous flow of liquid for monitoring conductivity. | |
Orion Flow Cells | Use 1.5 to 3 meters, clear plastic flexible non-phthalate PVC tubing, suitable for food packaging (6.35 mm ID, 9.53 mm OD, 1.59 mm wall thickness). | |
Orion Protective Guards for Conductivity Cells and Dissolved Oxygen Probes | Conductivity and Dissolved Oxygen Probes (Cat. Nos. 013005MD, 013010MD, and 013025MD) | Add weight and/or protection to your probe for rugged environments and submersion. |
All Orion electrodes and probes. | Weighted base, swing arm and electrode holder that accepts up to four electrodes or probes, and a stirrer probe. | |
All Orion electrodes and probes | Holds up to six 15mm conductivity and DO probes. | |
| Orion Lab Star Series Electrode Stand | All Orion electrodes and probes | Electrode stand with meter-attachable bracket |
View all electrochemistry meter accessories ›
Cleaning and storage of electrodes prolongs their life and helps ensure that each reading is as accurate as the last. Pouch and bottled packaging options are available so that you get the results you need in the field or in the lab.
Suitable for ultrapure water measurements, these low-level conductivity standards will help you meet your accuracy requirements. They hold their value due to our high-quality bottle material that is used, which mitigates losses and atmospheric contamination, while others can be affected. For USP <645> cell constant verification and other critical pure water applications, Orion Conductivity Standards are the ideal choice.
Solution | Formats |
Five 60 mL bottles at a concentration of 47 ppm as NaCl, NIST traceable | |
Ten 15 mL pouches, NIST traceable | |
Five 60 mL bottles or ten 15 mL pouches at a concentration of 692 ppm as NaCl, NIST traceable | |
Five 60 mL bottles or ten 15 mL pouches at a concentration of 7230 ppm as NaCl, NIST traceable | |
| 111.9 mS/cm conductivity standard | Five 60 mL bottles or ten 15 mL pouches at a concentration of 692 ppm as NaCl, NIST traceable |
One 475 mL bottle, NIST traceable | |
1413 µS/cm conductivity conditioning solution for the Orion 2-Electrode Cell Precise Probe | Five 60 mL bottles a concentration of 692 ppm as NaCl. Conditioning solution for use with the Orion 2-Electrode Cell Precise Probe (Cat. No. 011050MD), NIST traceable |
NIST Traceability
All Orion pH buffers, ISE and conductivity standards are traceable to NIST standard reference materials and are labeled with a lot code and expiration date. The NIST materials used for each product are listed on its Certificate of Analysis, along with the method of analysis, lot-specific test data with test tolerances and expiration date (if applicable). For a searchable list of all Thermo Scientific Certificates of Analysis and Material Safety Data Sheets (MSDS), visit the Thermo Fisher Scientific Documents & Support page.
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Knowledge Base: Certificates of Analysis and SDS for Orion, ROSS, AQUAfast, AquaMate, and AquaSensors products.
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