Infrared gas sensor

Semiconductor sensors convert a physical stimulus—like gas concentration, temperature, or light—into an electrical signal using semiconductor materials such as silicon, metal oxides, or compound semiconductors.

The world of modern electronics and computing rests on the shoulders of a fundamental class of materials: semiconductors. From smartphones to solar panels, semiconductors power our digital age. They form the basis of integrated circuits (ICs), transistors, and virtually every digital device. Understanding how semiconductors work is essential for anyone involved in electronics, engineering, or computer science.

NDIR, or Non-Dispersive Infrared, refers to a type of gas sensor technology that detects specific gases by measuring their absorption of infrared (IR) light at characteristic wavelengths. It is widely used for detecting gases such as CO₂, CH₄, CO, refrigerants, hydrocarbons, and other IR-active gases.

Sulfur hexafluoride (SF₆) is a colorless, odorless, non-flammable, and non-toxic gas that has become an essential dielectric medium in the power industry and other high-voltage applications.

Photoconductive sensors are a class of light sensors that operate based on the photoconductive effect, wherein the electrical conductivity of a material changes when it is exposed to light.

Pyroelectricity is a fascinating and practical phenomenon found in certain crystalline materials that can generate a temporary voltage when they are heated or cooled.

Electrochemistry is a branch of chemistry that deals with the relationship between electrical energy and chemical changes. While it may sound abstract, electrochemical reactions are deeply ingrained in everyday life, powering batteries, enabling corrosion protection, and even driving metabolic processes in the human body.

In recent years, agriculture has undergone a major technological transformation, often referred to as Smart Farming or Precision Agriculture. At the heart of this evolution lies the integration of smart sensors—advanced devices capable of collecting real-time data to optimize every aspect of farming.

As urbanization and digital transformation reshape our cities, public infrastructure is undergoing a profound evolution. One of the most overlooked but essential aspects of urban life is the public restroom. Traditionally associated with discomfort, poor maintenance, and hygiene concerns, public restrooms have now become a focal point for innovation in smart city planning.

Photoconductivity sensors, also known as photoresistors or light-dependent resistors (LDRs), are a type of light sensor that changes their electrical conductivity in response to variations in light intensity. These sensors operate on the principle of photoconductivity—where a material’s ability to conduct electricity increases as it absorbs light energy.