Explosive Detectors
There are a few questions to ask yourself if you are thinking about buying an explosive detector. First, what is the detection rate? And what is the range of detection? Explosive detectors can be used for many purposes, including identifying explosives and locating the source of an explosive explosion. Below are the three most common types of explosive detectors and the various methods they use. Once you have answered these questions, you’ll be ready to buy the best explosive detector for your needs.
Methods of detection
Although many new detectors can detect explosives, there are still limitations to these methods. First, the explosives detectors have to sample the explosive molecule to determine its presence. This isn’t a stand-alone or remote detection method and requires a significant reduction in cost and size. This method cannot detect liquid threat materials in containers, although it was briefly tested after the 9/11 attacks.
The optical absorption spectrums of the main explosive types have shown improvement. The analysis of explosives has been improved by the detection and identification of NO units. The spectral lines of TNT are wider than those of other organic-nitro-bearing explosives. However, nitric dioxide is a diatomic compound in the gasphase. This is evident in the optical absorption spectrum of TNT, Nitric oxide and other organic nitro–bearing explosives.
Rate of detection
For a variety of reasons, detection rates are important. First, the detection probability must be high enough to detect explosives, but low enough to cause false alarms. The sample size is also important: a small sample size means that detection failures will be less representative of the whole system than a large sample. The sample size must also be large enough for explosive detection on a single substrate. Ideal sample sizes of 30 to 45 detections are sufficient for trace analysis.
A gas sensor array is capable of detecting 11 types explosive vapors including DNT, PNT, and EtOH. The response curves for the sensors are shown below. Sensor two shows the most obvious response curves for TNT and PNT. The response value toward RDX is the highest for sensor 1, while the response to sensor 5 is the lowest. All four sensors have response times in the 30s range.
Detection range
The detection range of an explosive detector is the measurement of explosives’ ability alter the resistance. An example is shown in Figure 7, which shows the response values of eleven different explosives and three interfering gases. The difference in the response times for each explosive is the difference in the response value. However, this does not necessarily indicate the explosive’s effectiveness. Temperature can also affect the response values of sensors, so it is important to consider this.
The fingerprinting radar pattern patterns can be used in this example to identify the target vapors, DNT, PNT and KNO3. Each interfering gas exhibits a unique fingerprinting pattern. The different fingerprinting patterns result from the interaction between the different vapors and the TiO2 nanosheets. Different explosives have different vapor properties, as evidenced by the different fingerprinting patterns.