The product is used to ensure the safety of air, road, water and rail transport, to inspect postal correspondence, various packages and cargo, as well as individuals.
The MO-2DT detector is designed to detect particles of explosives (HE) after they have been collected by sampling wipes from the surface of the objects being inspected.
Detection of HE is accompanied by sound and light alarm signals, as well as in alphanumeric and graphic (ionogram) form on the MO-2DT LCD screen and/or on the display of an external computer.
General characteristics The MO-2DT detector is a desktop device and consists of an evaporation chamber, a gas path unit, an analytical unit, a visualization device and a control module combined into a robust housing
After taking a sample from the surface of the objects being examined, a paper napkin is inserted into the evaporation chamber, which automatically initiates the process of analyzing for explosives: heating the chamber to evaporate the explosive particles, blowing the napkin with an air flow that enters the analytical unit.
The analytical unit of the MO-2DT detector is developed on the basis of a unique technology based on the principle of nonlinear dependence of ion mobility on the electric field strength. This technology made it possible to create a compact and lightweight, but at the same time very sensitive device capable of detecting the presence of explosives in quantities of 100 picograms.
At the input of the analytical unit, the air flow is ionized under the action of radiation from the built-in generator. The resulting ions are separated under the influence of high-frequency alternating and direct electric fields. This division is a consequence of the different dependence of ion mobility on the electric field strength. At a certain ratio of the alternating field parameters and the constant bias voltage for each ion type, the average ion drift is compensated for (selection conditions are met), and only such ions reach the collector, creating an ion current.
Ions for which the selection conditions are not met recombine on the walls of the analytical tract.
The selected ions corresponding to explosive vapors are collected on the collector, creating an ion current, which, after amplification, registration and processing, initiates alarm signals corresponding to each type of explosive.
The MO-2DT detector is equipped with a built-in air preparation system, as well as an autocalibration system that ensures constant adjustment of the analytical unit parameters when environmental conditions change.
If explosives are detected, the evaporation chamber is automatically cleaned after removing the napkin.
To protect the detector from heavy contamination, the heating of the evaporation chamber is automatically switched off when large explosive signals appear during the analysis.
The measurement results can be stored in the internal memory of the MO-2DT detector and transmitted to an external computer both in real time and after the survey is completed.
The MO-2DT detector is connected to an external computer using a USB cable.
Distinctive features The MO-2DT detector does not contain radioactive materials and does not require a special carrier gas for its operation.
The MO-2DT detector can operate in 2 modes: laboratory and field. Different accessories and programs for controlling the heating of the evaporation chamber are used for each mode.
The laboratory mode is used to perform analyses that require increased sensitivity (400 - 10,000 picograms), and in this case specially prepared sampling grids and napkins are used.
In the "field" mode, standard paper for printers, copiers and other "office" applications can be used as sampling wipes.
Using the laboratory (highly sensitive) mode in the field is not practical. Experiments and calculations show that for effective detection of explosive particles in the field, sensitivity even at a level of 100 ng is sufficient.
Specifications
Analytical principle: Nonlinear dependence of ion mobility on electric field strength. Response time after sample introduction: Up to 12 seconds Detectable explosives: Based on: nitroglycerin (NG), pentaerythrotetrate (PETN), trinitrotoluene (TNT), hexogen (HG), tetryl, etc. Threshold sensitivity for TNT: “laboratory” mode - about 400 picograms “field” mode - about 20 nanograms Time until ready for operation after switching on (at 20°C): No more than 5 minutes. Alert signals: Light, sound, display of ionograms on the detector or computer display. Built-in memory: 800 ionograms with analysis results (up to 10,000 possible). Power supply: From the network 100 ÷ 240 V (up to 24 hours a day). Emergency power supply from a built-in battery is provided (up to 2 hours). Power consumption: No more than 55 VA Detector weight: 6.9 kg Detector dimensions without handle: 105x250x320 mm Operating temperature: + 5°С ... + 45°С, at relative humidity up to 80%