Are there explosion-proof electrodes for pH meters?

Yes, the electrodes of the pH meter have an explosion-proof design. Explosion-proof electrodes are designed primarily to prevent the generation of sparks or fires when used in flammable and explosive environments. Explosion-proof electrodes are typically manufactured using special materials and techniques to ensure their safety performance. This enables pH meters to carry out measurement and monitoring tasks in various hazardous environments, such as chemical plants and the oil and gas industry. .

It is already a well-established technology to make PH electrodes explosion-proof; be sure to discuss this with the manufacturer, otherwise you might easily be deceived

To be precise, it is an intrinsically safe pH electrode; together with an intrinsically safe transmitter, they form an intrinsically safe circuit. In my current work, I have not encountered flameproof pH electrodes.

Yes, consult Mettler or Hameton

The last edit to this post was made by qugd on 2023-8-7 at 09:05. pH electrodes can be divided into two categories in terms of safety and explosion prevention: one category consists of conventional analog electrodes, which do not have any circuits for signal amplification or transmission enhancement; in other words, there are no energy storage components in such electrodes. They meet the requirements for intrinsically safe devices in intrinsically safe circuits, so no intrinsically safety certification is required. If some users or design requirements call for documents proving intrinsically safe certification, it may be that they do not have a comprehensive understanding of the exemptions applicable to intrinsically safe equipment. The other type are the so-called digital electrodes, which integrate functions such as signal amplification, conversion, and long-distance transmission. Hydrogen requires power to be supplied to the entire electrode, and the circuits inside the electrode contain energy storage components (capacitors, inductors, or even step-up/step-down transformers). In such cases, relevant explosion-proof certifications are necessary before they can be used in explosive environments. The new version of the intrinsically safe explosion protection standards no longer uses exemptions; instead, they are described using simple device categories.

What is the name of this standard, and what is its number?

I can’t understand the content in Note 2; could the original poster provide the standard name?