In the armed forces of various countries, relying on their own chemical reconnaissance equipment, chemical warfare soldiers can quickly find poisons and find out the types and exposure of poisons. Chemical reconnaissance equipment is the general name of chemical reconnaissance, alarm, drug detection, monitoring and testing equipment. Its function is to determine whether it has been attacked by chemical agents, determine the types of agents, roughly determine the exposure concentration, detect the spread range of poison clouds, issue a warning to the army or report relevant data to the command and control center, so as to guide the army to take protective actions in time to prevent or reduce the harm of chemical agents.
At present, the chemical reconnaissance equipment equipped by various countries includes poison detection paper, poison detector, poison alarm, detector, monitor, sampling analysis and measurement system, chemical prevention reconnaissance vehicle, etc. The basic structural forms of chemical reconnaissance equipment include pocket type, portable type, fixed type and mobile type, which are respectively allocated to general units and professional units, as well as ships, aircraft, armored vehicles, airports and large fortifications.
Early chemical reconnaissance equipment used chemical detection methods. For example, using the chemical reagent sensitive to the poison, judge the poison and its concentration by checking whether the reagent is discolored and the depth of discoloration. However, this method requires specific reagents for specific agents. It takes many times to confirm a agent, and it requires high professional level of personnel. Therefore, other methods were developed later, such as using infrared spectrum detection technology.
According to the principle that the infrared spectrum is different from that of the molecule when the molecule rotates, it is known that the infrared spectrum can be produced when the molecule absorbs energy. There are also flame photometric detectors for chemical agents containing phosphorus or sulfur. If the air is mixed with phosphorus or sulfur-containing agents, the flame at a certain temperature will emit light of a specific wavelength. Therefore, the situation of the agents can also be known.