The Zirconia Oxygen Sensor utilizes a core containing two porous electrodes which are made of Zirconia ceramic elements combined with a thin layer of platinum. This element is what gives the sensor the ability to control the air-fuel ratio. In order to control this ratio, one side of the electrode is exposed to the air and the opposite side is Contact Us. CO2 sensors from METTLER TOLEDO provide accurate, in-line monitoring of dissolved CO2 levels for real-time process control. These dissolved CO2 sensors enhance process reliability through fast, accurate in-line CO2 measurement. Dissolved CO2 sensors are designed for bioreactor and brewing operations. Abstract. Carbon dioxide (CO 2) monitoring in human subjects is of crucial importance in medical practice. Transcutaneous monitors based on the Stow-Severinghaus electrode make a good alternative to the painful and risky arterial “blood gases” sampling. How Do Carbon Monoxide Detectors Work? Carbon monoxide detectors trigger an alarm based on an accumulation of carbon monoxide over time. Detectors may be based on a chemical reaction causing a color change, an electrochemical reaction that produces current to trigger an alarm or a semiconductor sensor that changes its electrical resistance in the presence of CO. The SCD4x is Sensirion’s next generation miniature CO2 sensor. This sensor builds on the photoacoustic NDIR sensing principle and Sensirion’s patented PASens® and CMOSens® technology to offer high accuracy at an unmatched price and smallest form factor. SMD assembly allows cost- and space-effective integration of the sensor combined with VOC sensors are specifically designed to detect and measure volatile organic compounds, which are organic chemicals that can easily vaporize into the air. Carbon dioxide, on the other hand, is a non-volatile gas and is not considered a volatile organic compound. While both VOCs and carbon dioxide can contribute to indoor air quality issues The U.S. Environmental Agency (EPA) defines VOC as: in addition to carbon monoxide, carbon dioxide, carbonic acid, metal carbides, carbonates, and ammonium carbonate, any carbon-containing compound that participates in photochemical reactions in the atmosphere. On average, each person inhales about 15kg of air per day, 80% of which is indoor air. Internal structure of MQ2 Gas Sensor. The MQ2 is a heater-driven sensor. It is therefore covered with two layers of fine stainless steel mesh known as an “anti-explosion network”. It ensures that the heater element inside the sensor does not cause an explosion because we are sensing flammable gasses. It also protects the sensor and filters wFQO.