Indian researchers have recently developed a high-sensitivity sensor that can detect hydrogen at very low concentrations. It is expected to be used in some places where hydrogen fuel is used to detect hydrogen leaks. Researchers at the Indian Institute of Technology Jodhpur and other institutions have recently published relevant papers in the Dutch academic journal "Sensors and Actuators Volume B: Chemistry". According to reports, when the hydrogen concentration in the environment is 100ppm (1ppm is one millionth), the detection sensitivity of this sensor can reach 74%. Its detection process takes about 25 seconds. The researchers used the principle that the resistance of zinc oxide and other materials will change when they come into contact with hydrogen to design the sensor. According to reports, some hydrogen sensors require a high temperature of about 250 degrees Celsius to activate related chemical reactions, but this new sensor can achieve the same effect at 150 degrees Celsius due to the addition of carbon nanofibers. This eliminates the need for a heater with a higher temperature in the new sensor, and its application value is greater. Hydrogen fuel is a new energy commonly used in many places. Although hydrogen is not polluted, it is flammable and explosive, so leakage must be prevented. Since hydrogen is colorless and odorless, it is generally difficult to detect leaking hydrogen in the environment.
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