COLO.Science — WATER QUALITY / ELECTROCHEMISTRY — PRO6143
Electrode for Ultra Pure Water PRO6143
PRO6143 electrode for ultra pure water is a specialized pH composite electrode for low-conductivity samples, designed for reliable pH measurement in ultra-pure water, deionized water, distilled water and other high-purity water applications. The electrode combines a pH indicator electrode and Longlife reference system in one unfillable body, with porous PTFE junction, epoxy sensor material, 0–11 pH range, 0–80 °C working temperature and S7 connector for compatible pH meter configurations.
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COLO.SCIENCE — PH ELECTRODES / ULTRA PURE WATER / LOW CONDUCTIVITY
Low-conductivity pH electrode for ultra-pure water measurement
The PRO6143 electrode for ultra pure water is designed for pH measurement in samples with very low ionic strength, where conventional pH electrodes may show unstable readings, slow response or drift. It is intended for laboratories working with ultra-pure water, deionized water, distilled water and high-purity water systems.
The electrode uses a Longlife reference system and porous PTFE junction to support stable liquid junction behavior in low-conductivity media. The S7 connector requires the correct S7-BNC(Q9) cable or compatible meter configuration, so connector matching should be confirmed before ordering.
Key features
- Electrode for ultra pure water and low-conductivity pH measurement.
- pH composite electrode combining pH indicator and reference functions.
- Longlife reference system for stable measurement behavior in low ionic strength samples.
- Porous PTFE junction for reliable electrolyte contact and reduced junction instability.
- pH range 0–11 for ultra-pure water and selected aqueous applications.
- Epoxy sensor material for practical laboratory handling.
- Unfillable construction for lower routine maintenance.
- S7 connector for compatible pH meter and cable configurations.
Suitable for
- Ultra-pure water pH measurement in laboratory workflows.
- Deionized water and distilled water pH checks.
- Low-conductivity water samples where standard electrodes may drift.
- Pharmaceutical water quality support and laboratory verification tasks.
- Semiconductor, electronics and high-purity water applications.
- Research laboratories working with low ionic strength aqueous samples.
TECHNICAL SPECIFICATIONS — PRO6143 ELECTRODE FOR ULTRA PURE WATER
| Model / SKU | PRO6143 |
| Product type | pH composite electrode for ultra-pure water |
| Application profile | Low-conductivity and ultra-pure water pH measurement |
| pH range | 0–11 pH |
| Reference type | Longlife Ref. |
| Fill solution | Unfillable |
| Sensor material | Epoxy |
| Junction material | Porous PTFE |
| Working temperature | 0–80 °C |
| Dimension | Ø12 × 120 mm |
| Connector type | S7 |
Final measurement performance depends on the pH meter, electrode condition, buffer quality, sample matrix, sample flow, temperature, calibration procedure, storage procedure and cable / connector configuration. Connector compatibility must be confirmed before quotation.
Low-conductivity electrode structure and practical laboratory use
Low-conductivity pH measurement
Ultra-pure water has very low ionic strength, which can make pH measurement unstable with standard electrodes. PRO6143 is built for this application profile.
Longlife reference system
The Longlife reference system supports stable electrode potential and helps reduce drift when the electrode is used correctly in high-purity water samples.
Porous PTFE junction
The porous PTFE junction is selected for reliable liquid junction behavior in low-conductivity media and supports consistent laboratory pH workflows.
VISUAL REFERENCE — ELECTRODE BODY AND CONNECTOR
PRO6143 pH composite electrode body and S7 connector configuration
Main electrode: PRO6143 pH composite electrode for ultra-pure water and low-conductivity samples.
Connector reference: S7 connector configuration. Use the correct S7-BNC(Q9) cable or compatible meter connection.
COLO.SCIENCE VIDEO
PRO6143 video presentation is in preparation
The video will present low-conductivity pH measurement, electrode structure, S7 connector configuration, calibration workflow and practical use with compatible COLO.Science pH meters.
COLO.SCIENCE ELECTROCHEMISTRY
Match PRO6143 with compatible pH meters and electrochemical instruments
PRO6143 should be selected together with the pH meter input configuration. Use the electrochemical instruments overview and pH meter section to confirm compatible instrument families, S7 cable requirements, BNC(Q9) meter inputs and required accessories.
| Electrochemical Instruments | pH Meters |
COLO.SCIENCE KNOWLEDGE / OUTBOUND LINK
Learn more about pH measurement in ultra-pure water and low-conductivity samples
Correct pH measurement in ultra-pure water depends on electrode selection, calibration technique, sample handling, CO₂ exposure, flow conditions, storage solution 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
Ultra-pure water systems
PRO6143 is suitable for laboratories that need a dedicated electrode for ultra pure water pH measurement and low-conductivity water quality checks.
Pharmaceutical and research laboratories
The electrode supports high-purity water workflows where stable pH measurement and correct electrode selection are critical for repeatable laboratory results.
Semiconductor and electronics support
Low-conductivity pH measurement is relevant for laboratories supporting high-purity water monitoring in electronics, semiconductor and precision cleaning environments.
Replacement electrode selection
PRO6143 is relevant when the existing meter configuration accepts an S7 electrode through the correct cable or compatible pH input arrangement.
How to choose the correct electrode for ultra pure water
When selecting the PRO6143 electrode for ultra pure water, the complete measurement setup should be checked, not only the pH range. Confirm the meter model, S7 cable or BNC(Q9) input arrangement, sample type, expected conductivity, measurement vessel, temperature conditions and routine calibration procedure before ordering.
COLO.Science can help match PRO6143 with compatible pH meters, calibration buffers, electrode storage solutions, S7-BNC(Q9) cable options and accessories so that the final configuration supports the intended laboratory method and daily measurement workflow.
PRO6143 electrode for ultra pure water and low-conductivity pH measurement
The PRO6143 electrode for ultra pure water is a specialized pH composite electrode for laboratories that need stable pH measurement in high-purity and low-conductivity water samples. Standard pH electrodes may show slow response or unstable readings in these samples because ultra-pure water has very low ionic strength. PRO6143 addresses this application with a Longlife reference system, porous PTFE junction and epoxy body.
In daily use, the quality of low-conductivity pH measurement depends on more than the electrode specification. Buffer freshness, calibration frequency, sample exposure to air, temperature, electrode storage, junction condition and the selected pH meter all influence measurement stability. PRO6143 provides a dedicated electrode platform for ultra-pure water, 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, calibration solutions and accessories. PRO6143 uses an S7 connector and may require a suitable S7-BNC(Q9) cable for meters with BNC input. 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.
