pH Flat Composite Electrode · Polycarbonate Body · Ag/AgCl · BNC(Q9) · 0–14 pH
Flat pH composite electrode for surface measurements and micro‑volume samples.
OVERVIEW
This flat pH composite electrode features a unique flat sensing surface, specially designed for pH measurements on solid or semi-solid materials such as agar plates, paper, textiles, leather, skin, and food surfaces. It is also ideal for small liquid volumes (down to a few microliters) where conventional electrodes cannot be immersed. The flat geometry allows direct contact with the sample, providing accurate and stable readings without sample preparation.
With a pH range of 0–14, a durable polycarbonate body, and a single fabric junction, this electrode combines robustness with reliable performance. The Ag/AgCl reference system ensures stable potential, and the standard BNC(Q9) connector offers direct compatibility with most laboratory pH meters. Ideal for microbiology, quality control, food testing, and surface pH mapping applications.
Flat pH electrode for surface measurements and micro‑volume samples featuring polycarbonate body, single fabric junction, and Ag/AgCl reference. pH 0–14, 5–60 °C, Φ12×120 mm with BNC(Q9) connector — ideal for agar plates, paper, and small droplets.COLO.Science · Practical and robust equipment for everyday laboratory workflows.
COLO.SCIENCE KNOWLEDGE
Practical insights for surface pH measurement
Explore technical articles on flat membrane electrodes, surface pH mapping techniques, micro‑volume measurements, and applications in microbiology, food quality control, and material testing.
Product Overview
The flat pH composite electrode is engineered for applications where traditional dip‑type electrodes cannot be used. Its flat sensing surface allows direct contact with solid or semi‑solid samples such as agar plates, paper, leather, textiles, skin, or food products. It is also ideal for small liquid volumes (10–50 µL) where the flat tip simply touches the droplet. The polycarbonate body is impact‑resistant and chemically durable, while the single fabric junction ensures stable liquid junction potential and prevents clogging.
Compatibility notice — connector and meter matching are essential
This electrode features a standard BNC(Q9) connector, widely used on most pH meters. Always verify that your meter accepts BNC input. For meters with S7 connector, an S7‑BNC(Q9) cable is available separately.
Key Features
Surface Measurement
Small Volume Samples
pH Range 0–14
Polycarbonate Body
Single Fabric Junction
Ag/AgCl Reference
5–60 °C
3 M KCl Fill
BNC(Q9) Connector
Electrode
Designed for challenging sample geometries
Surface pH Mapping
Ideal for direct pH measurement on agar plates, paper, textiles, leather, skin, or food surfaces. The flat sensor ensures complete contact.
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.
Robust Polycarbonate Body
The durable polycarbonate construction withstands routine laboratory use and is resistant to impact and many chemicals.
Electrode Design
- Flat composite electrode
- Combines pH indicator and reference electrode
- Flat sensing surface for solid/semi‑solid samples
- Dimensions: Φ12×120 mm
Materials & Reference System
- Sensor material: Polycarbonate
- Reference type: Ag/AgCl
- Junction material: Single fabric
- Fill solution: 3 M KCl
Operating Conditions & Connection
- pH range: 0–14
- Working temperature: 5–60 °C
- Connector type: BNC(Q9)
Technical Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Model | – | Name | pH composite electrode (Flat) |
| pH Range | 0–14 | Fill Solution | 3 M KCl |
| Sensor material | Polycarbonate | Working Temp. | 5–60 °C |
| Junction material | Single fabric | Reference Type | Ag/AgCl |
| Dimension | Φ12×120 mm | Connector Type | BNC(Q9) |
Note: Please verify connector and meter compatibility before purchase. This electrode has a standard BNC(Q9) connector. For meters with S7 input, an S7‑BNC(Q9) cable is available separately.
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 |
|---|---|
| BNC(Q9) | This electrode features a standard BNC(Q9) connector. Directly compatible with most pH meters. |
| S7 | For meters with S7 input, use an S7‑BNC(Q9) cable (available separately). |
pH Flat Composite Electrode
A specialized flat pH electrode for surface measurements and micro‑volume samples with polycarbonate body, single fabric junction, and BNC(Q9) connector — supported by COLO.Science.
COLO.Science · Practical and robust equipment for everyday laboratory workflows.
