Thermo Fisher pH & Electrochemistry: Orion pH Meters, Electrodes & Buffers

From fast routine checks to regulated testing, Thermo Scientific™ Orion™ pH and electrochemistry instruments give you trusted readings across pH, ORP/Redox, ion concentration, conductivity, salinity, resistivity, and dissolved oxygen. On this page you can quickly explore, compare, and request quotes. Iright supplies a broad range of genuine Thermo Fisher meters, electrodes, and standards to fit your lab, field, or process needs.

What’s in the Thermo Fisher pH & Electrochemistry Range

Thermo Fisher’s Orion portfolio spans benchtop and portable meters, high-performance electrodes and sensors, and the buffers and standards needed for calibration and verification. You’ll also find specialized kits for difficult samples and multi-parameter systems that scale as your testing grows.

Highlights include: Versa Star Pro™ multi-channel benchtop systems (VSTAR series), Lab Star PH111 bench meters (LSTAR series), Star A portable meters (STARA series), ROSS™/ROSS Ultra™ pH electrodes (e.g., 8102BNUWP), DuraProbe™ conductivity cells (e.g., 013005MD), RDO™ optical DO probes (e.g., 087010MD), and NIST-traceable pH buffers (910104/910107/910110).

Shop by Category: Quick Entry Points

Use the fast paths below to jump straight to the products that match how and where you test. Each category points to common choices so you can shortlist faster and request a quote immediately.

• Benchtop pH & Multi-Parameter Meters: Versa Star Pro (VSTAR10, VSTAR94); Lab Star PH111 (LSTAR1110/LSTAR1115).
  
• Portable Meters: Star A121 pH (STARA1215 kit), Star A323 DO (STARA3235 kit), Star A329 multi-parameter (STARA3290/3295).
  
• Electrodes & Sensors: ROSS Ultra pH (8102BNUWP), ORP (9678BNWP), ISE (9609BNWP fluoride; 9512BNWP ammonia), Conductivity (013005MD), Optical DO (087010MD).
  
• Buffers & Standards: pH 4.01/7.00/10.01 (910104/910107/910110), ORP standard (967901/967961), Conductivity standards (011006/011007).

Selection Guide: Pick the Right Meter & Electrode

Start with where you measure (bench vs. field), then match accuracy, compliance, and sample chemistry. For mixed parameters or future growth, a modular Versa Star Pro bench meter pays off; for one-hand field work, use Star A portables with IP-ready accessories. For TRIS buffers/protein media or tough samples, ROSS/ROSS Ultra electrodes maintain accuracy and stability.

Quick tips

• pH in complex matrices (TRIS, proteins, high/low pH): choose ROSS or ROSS Ultra (e.g., 8102BNUWP; 8157BNUMD Triode with built-in ATC).

• Dirty/viscous/conductive samples: pick DuraProbe conductivity cells (013005MD/013010MD).

• Low-maintenance field DO: use RDO optical probe (087010MD) with Star A or Versa Star modules.

Compare Popular Thermo Fisher Bench & Portable Meters

Below is a side-by-side snapshot to help you narrow choices by parameters, flexibility, and typical use. Specs follow Thermo Fisher documentation for the listed families.

Electrodes & Sensors: pH, ORP, ISE, Conductivity, DO

Electrodes determine accuracy as much as the meter. Choose body material, junction, and connector for your chemistry and platform, and match cable/connector types (BNC, Mini-DIN, etc.) to your meter.

• pH (general & demanding): ROSS Ultra 8102BNUWP (glass, double junction) for fast, stable readings across challenging matrices; Triode pH/ATC 9107BNMD combines pH and temperature in one.

• ORP/Redox: 9678BNWP Sure-Flow ORP electrode handles dirty/viscous samples and strong acids/bases.

• Ion-Selective (ISE): 9609BNWP fluoride ISE and 9512BNWP ammonia ISE offer reliable, economical ion measurements with proper ISA and membrane care.

• Conductivity: DuraProbe 4-cell epoxy-body cells (013005MD/013010MD) with built-in ATC provide stable readings from 1 µS/cm to 200 mS/cm.

• Dissolved Oxygen: RDO Pro-X optical probe (087010MD) pairs with Star A/Versa Star for fast, low-maintenance DO.

Buffers, Standards & Calibration Solutions

Accurate calibration underpins every measurement. Use fresh, NIST-traceable buffers and matrix-appropriate standards; follow the 2- or 3-point calibration recommended for your method and refresh regularly based on workload.

• pH Buffers (475 mL): pH 4.01 (910104), pH 7.00 (910107), pH 10.01 (910110); color-coded and NIST-traceable.

• ORP Standard: +420 mV ORP standard—choose 475 mL (967901) or 5 × 60 mL pack (967961).

• Conductivity Standards: Common auto-recognized values include 1413 µS/cm (011007) and 12.9 mS/cm (011006).

Applications: Laboratory, Field & Process

Your environment dictates meter format and electrode build. Labs benefit from modular bench systems, field teams need rugged portables and optical DO, and process users often standardize to Sure-Flow or DuraProbe designs for easy cleaning and stability.

• Laboratory: QC/validation, method development, regulated testing; multi-channel Versa Star Pro with ROSS Ultra pH electrodes.

• Field/Environmental: Site surveys, aquaculture, utilities; Star A portable kits with Triode pH/ATC and RDO optical DO.

• Process/Industrial: Wastewater, plating, harsh or dirty samples; DuraProbe conductivity cells and Sure-Flow ORP electrodes for clog-resistant performance.

Featured SKUs — Ready to Quote

Below are in-demand, widely specified Thermo Fisher items you can request today. All catalog numbers match Thermo Fisher listings.

FAQs: Thermo Fisher pH & Electrochemistry

Before you request a quote, check the quick answers to common product questions. If your application is regulated, tell us your method—we’ll align the meter/electrode and calibration accordingly.

1. Which pH electrode should I use for TRIS buffers or protein media?
Use a ROSS or ROSS Ultra pH electrode to avoid silver-chloride interference and maintain stability over temperature; Triode versions add built-in ATC to simplify calibration. 

2. How often should I calibrate my pH meter?
Calibrate daily for routine work or before each series of critical measurements. Use fresh, NIST-traceable buffers (4.01/7.00/10.01) and match buffer temperature to your samples.

3. Do I need ORP standards to calibrate Redox measurements?
Yes—Thermo’s ORP standard (+420 mV) is designed for simple, single-point offset calibration with ORP electrodes such as 9678BNWP.

4. What makes optical DO (RDO) easier than polarographic DO?
RDO sensors require less maintenance (no membranes/electrolyte), provide fast start-up, and are ideal for field work with portable meters or modular benchtops.

5. Which conductivity cell should I pick for difficult samples?
Use 4-electrode DuraProbe cells (013005MD/013010MD) with built-in temperature sensors; they minimize fringe-field errors and maintain accuracy over a wide conductivity range.

Talk to Iright

Tell us your parameters, sample matrix, and where you measure (bench, field, or process). We’ll assemble a meter/electrode/standards kit tailored to your method and provide a fast quotation—backed by genuine Thermo Fisher SKUs and documentation.