COLO.Science — WATER QUALITY / ELECTROCHEMISTRY — PRO6140
pH Composite Electrode PRO6140
PRO6140 pH composite electrode is a general-purpose laboratory pH electrode for routine pH measurement in aqueous samples. It combines the pH indicator electrode and Ag/AgCl reference electrode in one practical glass-body electrode. With a 0–14 pH range, 3 M KCl fill solution, glass sensor material, single ceramic junction, 5–60 °C working temperature and standard BNC(Q9) connection, PRO6140 is designed for everyday laboratory pH workflows where a robust composite electrode and broad meter compatibility are required.
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COLO.SCIENCE — PH ELECTRODES / ELECTROCHEMISTRY / WATER QUALITY
General-purpose pH composite electrode with Ag/AgCl reference, glass body and BNC(Q9) connector
The PRO6140 pH composite electrode is intended for laboratories that need a practical general-purpose electrode for routine pH measurement. The composite design combines the pH indicator electrode and reference electrode in one body, eliminating the need for a separate reference electrode in standard pH measurement workflows.
This electrode is especially useful when a laboratory pH meter accepts a standard BNC(Q9) electrode connection. Compatibility should always be confirmed before ordering, because pH meter connector formats, temperature inputs and electrode accessories may vary between instruments.
Key features
- Composite pH electrode combining pH indicator and reference electrode functions.
- Ag/AgCl reference system for routine pH electrode workflows.
- pH range 0–14 for general laboratory measurement.
- 3 M KCl fill solution for the reference system.
- Glass sensor material for standard laboratory liquids and careful bench handling.
- Single ceramic junction and Ø12 × 120 mm body format.
- BNC(Q9) connection for compatible laboratory pH meters.
Suitable for
- Routine pH measurement in water quality laboratories.
- General aqueous sample pH testing with compatible instruments.
- Teaching laboratories and practical pH calibration exercises.
- Quality-control laboratories using standard pH meters with BNC input.
- Replacement electrode configurations for meters using BNC(Q9) pH electrode input.
- Laboratories that need a simple composite pH electrode without integrated temperature probe.
TECHNICAL SPECIFICATIONS — PRO6140 PH COMPOSITE ELECTRODE
| Model / SKU | PRO6140 |
| Product type | pH composite electrode |
| Electrode structure | pH indicator electrode + reference electrode |
| pH range | 0–14 pH |
| Reference type | Ag/AgCl |
| Fill solution | 3 M KCl |
| Sensor material | Glass |
| Junction material | Single ceramic |
| Working temperature | 5–60 °C |
| Dimension | Ø12 × 120 mm |
| Connector type | BNC(Q9) |
Final measurement performance depends on the pH meter, electrode condition, buffer quality, sample matrix, temperature compensation settings, storage procedure and laboratory method. Connector compatibility must be confirmed before quotation.
Composite electrode structure and practical laboratory use
pH indicator electrode
The pH-sensitive element provides the measurement signal for routine pH determination within the specified 0–14 pH range.
Ag/AgCl reference
The integrated Ag/AgCl reference system with 3 M KCl fill solution supports stable routine pH measurement when the electrode is correctly maintained.
BNC(Q9) connection
The BNC(Q9) connector supports direct connection to compatible laboratory pH meters with BNC electrode input.
VISUAL REFERENCE — ELECTRODE BODY AND CONNECTOR
PRO6140 glass-body pH composite electrode and BNC(Q9) connector reference
Main electrode: PRO6140 pH composite electrode with glass body, Ag/AgCl reference and single ceramic junction.
Connector reference: BNC(Q9) connection. Meter compatibility must be confirmed before ordering.
COLO.SCIENCE VIDEO
PRO6140 video presentation is in preparation
The video will present electrode structure, BNC(Q9) connection, calibration workflow, routine pH measurement and practical use with compatible COLO.Science pH meters.
COLO.SCIENCE ELECTROCHEMISTRY
Match PRO6140 with compatible pH meters and electrochemical instruments
PRO6140 should be selected together with the meter input configuration. Use the electrochemical instruments overview and pH meter section to confirm compatible instrument families, pH electrode inputs, temperature probe requirements and calibration accessories.
| Electrochemical Instruments | pH Meters |
COLO.SCIENCE KNOWLEDGE / OUTBOUND LINK
Learn more about pH measurement, calibration and water quality analysis
Correct pH measurement depends on electrode selection, calibration buffers, temperature compensation, storage solution, sample type and routine maintenance. Explore additional electrochemistry and water quality resources before selecting the final configuration.
| Read on COLO.Science → | NIST reference → |
Applications and laboratory value
Water quality laboratories
PRO6140 is suitable for routine pH measurement in water quality workflows where a simple composite pH electrode and BNC(Q9) connection are required.
Routine laboratory pH testing
The composite electrode configuration helps reduce setup complexity and supports practical pH measurement with compatible benchtop or portable pH meters.
Education and training
PRO6140 is useful for teaching pH electrode structure, reference systems, calibration practice and standard BNC-connected pH measurement.
Replacement electrode selection
The electrode is relevant when the existing meter requires a BNC(Q9) pH signal connector and a standard composite electrode without integrated temperature probe.
How to choose the correct pH composite electrode configuration
When selecting the PRO6140 pH composite electrode, the complete measurement setup should be checked, not only the pH range. Confirm the meter model, BNC(Q9) pH input, sample type, required temperature compensation and routine calibration procedure before ordering.
COLO.Science can help match PRO6140 with compatible pH meters, temperature probes, calibration buffers, electrode storage solutions and accessories so that the final configuration supports the intended laboratory method and daily measurement workflow.
PRO6140 pH composite electrode for daily laboratory pH measurement
The PRO6140 pH composite electrode is a practical electrode for laboratories that need a general-purpose sensor assembly for pH measurement and reference function. The composite construction reduces the need for a separate reference electrode and helps simplify routine pH measurement workflows where instrument compatibility is confirmed.
In daily use, the quality of pH measurement depends on more than the electrode specification. Buffer freshness, calibration frequency, sample temperature, electrode storage, junction condition and the selected pH meter all influence measurement stability. PRO6140 provides a compact composite electrode platform, while the final laboratory setup should be defined as a complete pH measurement system.
Configuration notice
pH electrodes may be delivered or used in different configurations depending on the selected pH meter, connector/cable arrangement, temperature input, calibration solutions and accessories. The official quotation defines the final scope of supply. Website content is provided for general product presentation and may not represent the exact delivered configuration. Specifications may change without notice.
