pH Composite Electrode (Flat) for Surface Measurement & Small Volumes · S7 Connector · 1–12 pH
Flat pH composite electrode for surface measurements
OVERVIEW
This pH composite electrode with flat sensor is specifically designed for pH measurements on flat surfaces, in small liquid volumes, or for semi-solid samples where conventional electrodes cannot be immersed. The flat glass membrane allows direct contact with surfaces such as agar plates, paper, textiles, or skin, and also enables measurements in micro-volume samples (down to a few microliters) by simple surface contact.
Combining pH indicator and reference electrode in one body, it features a Longlife reference system, an unmovable glass grinding junction for stable electrolyte flow, and a 3 M KCl fill solution. With pH range 1–12, glass body, and S7 connector, this electrode is ideal for surface pH mapping, quality control in printing and coating industries, and life science applications.
Flat pH electrode for surface measurements and micro-volume samples featuring flat glass sensor, Longlife reference, and glass grinding junction. pH range 1–12, 0–60 °C, S7 connector — ideal for agar plates, paper, textiles, and small droplets.COLO.Science · Practical and robust equipment for everyday laboratory workflows.
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Explore technical articles on flat membrane electrodes, surface pH mapping techniques, micro-volume measurements, and applications in biology, printing, and quality control.
Product Overview
The flat pH electrode is engineered for applications where traditional dip-type electrodes cannot be used. Its flat glass sensing membrane allows direct measurement on surfaces such as agar plates, paper, leather, textiles, or skin. It is also ideal for small volume samples (10–50 µL) where the electrode tip simply contacts the droplet. The unmovable glass grinding junction ensures a stable reference potential even with minimal sample contact.
Compatibility notice — connector and meter matching are essential
The connector must be compatible with the meter you are using. This model features an S7 connector and requires an S7-BNC(Q9) cable for use with meters having BNC input. Please confirm compatibility with your meter before ordering.
Key Features
Surface Measurement
Micro-Volume Samples
pH Range 1–12
Longlife Reference
Glass Grinding Junction
3 M KCl Fill
Glass Body
0–60 °C
S7 Connector
Electrode
Designed for challenging sample geometries
Surface pH Mapping
Ideal for direct pH measurement on agar plates, paper, textiles, leather, or skin. The flat sensor ensures complete contact with the surface.
Micro-Volume Samples
Measure pH in droplets as small as 10–50 µL by simply touching the sample. Perfect for precious or limited-volume biological samples.
Stable Reference Junction
Unmovable glass grinding mouth provides consistent electrolyte flow and prevents clogging, ensuring long-term stability.
Electrode Design
- Flat glass sensing membrane
- Composite design (indicator + reference)
- No separate reference electrode needed
- Optimized for surface contact and micro-volumes
Materials & Reference System
- Sensor material: Glass
- Reference type: Longlife Reference
- Junction material: Unmovable glass grinding mouth
- Fill solution: 3 M KCl
Operating Conditions & Connection
- pH range: 1–12
- Working temperature: 0–60 °C
- Dimensions: Φ12×120 mm
- Connector type: S7 (requires S7-BNC(Q9) cable for BNC meters)
Technical Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Model | – | Name | pH composite electrode (Flat) |
| pH Range | 1–12 | Fill Solution | 3 M KCl |
| Sensor material | Glass | Working Temp. | 0–60 °C |
| Junction material | Unmovable glass grinding mouth | Reference Type | Longlife Ref. |
| Dimension | Φ12×120 mm | Connector Type | S7 |
Note: Please verify connector and meter compatibility before purchase. This electrode has an S7 connector and requires an S7-BNC(Q9) cable for use with meters having BNC input. Exact supplied configuration may vary depending on quotation and application.
General Electrode Notes
- pH electrodes are available as pH indicator electrode, composite electrode, and 3 in 1 pH composite electrode (with temperature probe).
- A pH indicator electrode needs to cooperate with a separate reference electrode.
- A composite electrode combines the pH indicator electrode and reference electrode.
- A 3 in 1 pH composite electrode combines the pH indicator electrode, reference electrode, and temperature probe.
- Temperature probes can adjust pH measurements by correcting the electrode slope according to the measured temperature.
- The connector must be compatible with the meter you are using. Options include S7 [S7-BNC(Q9) cable] and BNC(Q9).
Connector Options & Compatibility
Different meters may require different connection formats. Always confirm connector type before ordering.
| Connector / Option | Notes |
|---|---|
| S7 | This electrode features S7 connector. Use with S7-BNC(Q9) cable for meters with BNC input. |
| BNC(Q9) | Common pH electrode connector format. Can be adapted via S7-BNC(Q9) cable. |
Flat pH Electrode for Surface & Micro-Volume Measurements
A specialized flat pH electrode for surface pH mapping and micro-volume samples with Longlife reference, glass grinding junction, glass body, and S7 connector — supported by COLO.Science.
COLO.Science · Practical and robust equipment for everyday laboratory workflows.
