SenTix 91 precision pH combination electrode with ATC (DIN+banana plugs)

Which pH meter/electrode do I need?...

Making sure you have the right electrode and meter for your application can be confusing, not to mention correct maintenance and what to do if you are having issues. You can find links to our support guides below to help you through the process.

If you are after an electrode selector guide for some of our most popular electrodes and what applications they are recommended for you can find that below.

Electrode Selector Guide

If you require any further assistance, or extra information you can request that here and one of our trained technical specialists will be in contact. Please provide as much detail as possible so that we can get back to you with the right information.

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pH measurement shows a wide range of applications, from routine measurement in aqueous solutions up to special applications in a variety of media such as strong acid or alkaline solutions, with suspended solids or non-aqueous phases. The sample consistency can vary from liquid to firm, and measurements can be taken in a sheltered laboratory environment or outdoors in harsh conditions. Across all these variables, the range of SenTix® electrodes has a solution.

The SenTix range of electrodes includes low-maintenance electrodes, precision electrodes, electrodes with or without temperature sensors, analogue electrodes and digital electrodes including IDS technology.

SenTix® pH electrodes analogue 

WTW SenTix® quality electrodes – measurement convenience and precision in one. 

• Low-resistance membrane glasses warranty stable measurement signals even at low temperatures
• Silver ion-free reference electrolyte together with the proven platinum wire junction prevents measurement problems due to precipitating silver compounds
• Functional slider for opening and safe closing of the refill opening with electrodes with liquid electrolyte
• Connection possibilities: waterproof DIN plug, BNC plug, fixed cable (1 or 3 m) or plug head (S7)

SenTix® IDS Options:

SenTix® 945 - Fast and universal, a perfect gel electrode for the laboratory

• Three junctions for fast and precise response
• Gel filling guarantees low maintenance during lifetime
• Smooth glass shaft allows easy cleaning

SenTix® Micro 900 - A slender solution for small measurements

• Extra-long, thin shaft supports measurement in small vessels or sample volumes
• Platinum wire junction for fast and stable measurements
• Built-in temperature provides for accurate readings

SenTix® Sp-T 900 - Semi-solid samples are no problem

• Spear type membrane facilitates measurement in semi-solid samples
• Hole junction and polymer electrolyte - Insensitive against pollution and easy to clean
• Built-in temperature provides for accurate readings

SenTix® HW-T 900 - Extraordinary samples require outstanding pH electrodes

• Adjustable split ring junction enables measurement in most difficult samples
• Large electrolyte reservoir for reduced maintenance
• Built-in temperature supports accurate readings 

Cross-Reference Tables

Contains older SI Analytics products being replaced by WTW products.