Understanding Electrochemical Sensors
What is an Electrochemical Sensor?
Electrochemical sensors find certain substances using a chemical reaction that makes an electrical signal. In simple terms, they have three main parts:
- Receptor – Catches the substance.
- Analyte – The chemical or gas being found.
- Transducer – Turns the reaction into a signal.
In these sensors, the electrode is the transducer, where the reaction happens.
How Do These Sensors Work?
To work, the electrode touches the substance and causes a reaction. Because of this, the substance either:
- Oxidises (loses electrons) or
- Reduces (gains electrons).
After that, the sensor measures the electric current. Then, it tells how much of the substance is there.
For example, a sensor that finds nitric oxide (NO) checks how it reacts. To be more accurate, electrodes can have coatings, membranes, or special materials.
Applications
Because they are reliable, these sensors appear in many industries. For instance:
- Gas detection – Used in industrial safety, workplace monitors, and confined spaces.
- Healthcare – Found in glucose monitors, oximeters, and breath analysers.
- Environmental monitoring – Tracks air and water quality.
- Automotive – Helps with emissions and battery safety.
- Consumer electronics – Used in CO detectors and fitness wearables.
- Food & beverage – Ensures safety and compliance.
Popular Gas Detectors Featuring Electrochemical Sensors
Several leading gas detection devices incorporate electrochemical sensor technology, including:
Download the ‘Understand Electrochemical Sensor’ guide today.
