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An analogue of GCHA-21, but equipped with a built-in system of catalytic purification of the resulting nitrogen from hydrocarbons. GCHA-21D nitrogen generators are designed to produce nitrogen of the highest purity in laboratory conditions. The warranty period of operation of the generator is 18 months from the date of sale by the manufacturer. Technical specifications The grade of nitrogen produced according to GOST 9293-74 is high purity, grade I The volume fraction of nitrogen is not less than, % vol. (including impurities of inert gases: argon, neon, helium) 99,999 The volume fraction of oxygen is not more than, % vol. (ppm) 0.0005 (5 ppm) The volume fraction of water vapor is not more than, % vol. (ppm) 0.0007 (7 ppm) The volume fraction of hydrogen is not more than, % vol. (ppm) 0.0002 (2 ppm) The volume fraction of the sum of carbon-containing compounds in terms of methane is not more than, % vol. (ppm) (with a concentration of methane in the supply air not more than 5 ppm)* 0.00001 (0.1 ppm) Maximum nitrogen capacity is not less than 21 liters/hour (350 ml/min) Nominal output pressure of nitrogen is 4 ati The time of setting the operating mode for single-shift operation is no more than 45 min Nominal inlet air pressure is 6 ati Maximum allowable inlet air pressure is 7 ati Minimum inlet air pressure is 5 ati Compressed air consumption, at nominal inlet pressure is no more than 300 l/h (5 l/min) Power consumption is not more that 110 VA Overall dimensions, (width x depth x height) are not more than, mm 230x425x510 Weight, not more than, kg 25 Working conditions: Ambient temperature, °C from +10 to +35 Electric power supply from a single-phase AC network with a voltage of 220 ± 10% and a frequency of 50 ± 1 Hz Average full service life is at least 6 years The generator for electrical safety meets the requirements of Class 1, type H according to GOST 12.2.025-76

These generators are designed to supply hydrogen to flame chromatographic detectors. The produced hydrogen meets the requirements of GOST 3022-80. Technical specifications for GV-75 iGV-75-O: Productivity H2, l/h 0-75 0-75 O2 capacity, l/h - 37 Maximum output pressure, atm 2 2 Hydrogen pressure stability, not worse, atm 0.0025 0.0025 Hydrogen water content, not more than, ppm 5 5 Purity of hydrogen, % 99.995 99.995 Time to enter the mode, min 30 30 Water consumption, g/l H2 1.0 1.0 Working time without refilling water, hour 4 4 Tank volume O2, l 2.5 2.5 The volume of water to be added to the O2 tank when the "Top up water" alarm is triggered is no more than 1,4 1,4 liters Power consumption, max, VA 800 800 Overall dimensions (width×depth×height), not more than, mm 260×438×550 260×438×550 Weight, not more than, kg 25 26

The characteristics of the device are similar to the GVCH-12A model; the difference is in the absence of an autoregeneration system for fine gas filters. Technical specifications Purity of hydrogen in terms of dry gas is about 99.9999% The concentration of water vapor at 20 ° C and 1 atm is not more than 5 ppm In the output pressure stabilization mode The range of the specified output pressure of hydrogen is from 1.5 to 6.1 ati Stability of the output pressure of hydrogen is not worse than ± 0.02 ati Maximum hydrogen capacity reduced to normal conditions is 12 l/h The time of setting the operating mode, with the output turned off is no more than 30 min In the performance stabilization mode: The range of the specified hydrogen performance is from 0 to 12 l/h Maximum developed pressure in performance mode is 5.0 ati Volume of distilled water to be poured is 1.0 l Distilled water consumption is no more than 0.02 l/hour Water consumption is 1.6 g/l of hydrogen The average life of a replaceable deionization filter cartridge (at maximum performance and single-shift operation) is at least 1 year Average power consumption: in stationary mode is no more than 150 VA maximum (at startup) is no more than 200 VA Overall dimensions of the generator, (width x depth x height) are not more than 230x470x450 mm The mass of the generator is not more than 15 kg Operating conditions: ambient temperature, °C, from +10 to +35 powered by single-phase AC voltage, V, 220 (+10 -15)% and frequency, Hz, 50 ± 1 The generator for electrical safety meets the requirements of Class 1, type H according to GOST 12.2.025-76

It is intended for express analysis of various types of solid opaque samples, including polymer films and fragments, paint coatings, finished dosage forms in the form of tablets, optical parts and semiconductor materials. • The sample is located on the subject plane of the investigated surface downwards, the angle of incidence of the central beam on the sample is 45 ° • The diameter of the focus spot is 3 mm • Allows you to explore objects of any shape and size • When using a mini-press, it allows you to examine samples in the form of a thin layer rolled out on a mirror plate made of alloy steel (radiation passes through the substance layer twice, reflecting from the mirror surface) • Not used: for the study of bulk and liquid substances

It is used in the study of samples compressed into small-diameter tablets with KBr (the method is convenient for spectral analysis of powdery substances - the prefix allows you to work with small amounts of the sample using a manual press for the manufacture of tablets). • The diameter of the focus spot is less than 3 mm • Parabolic mirror optics are used in the design • Windows-substrates can be placed in the prefix after pasty, liquid substances or extracts are applied to them, followed by drying of the layers • Limited use – in the study of whole samples with dimensions less than 5 mm (preferably using a vertical-type microfocusing attachment)

The software and measurement complex includes a set of sensors and is intended for use as a demonstration material, setting up an experiment. The complex consists of a set of sensors and a software package. The measurement results are displayed in the form of graphs and digital values on the PC screen. The sensors are designed to work together with a PC via a USB 2.0 interface, running software compatible with Microsoft Windows 10 PRO. The software and measurement complex includes a set of sensors and is intended for use as a demonstration material, setting up an experiment. The complex consists of a set of sensors and a software package. The measurement results are displayed in the form of graphs and digital values on the PC screen. The sensors are designed to work together with a PC via a USB 2.0 interface, running software compatible with Microsoft Windows 10 PRO. The complex is accompanied by: - product passport; - instruction manual; - an inventory of investments. The warranty period for the product is at least 24 months.

The Meta-chrome digital gas flow meter is designed to maintain a given pressure and the ratio of the amount of gases (in the flow mode) or gas flow (in the intake mode) in vacuum installations with automatic and manual control. technical specifications The number of control channels is 2 (or more on request). The maximum flow rate for each of the channels is 700 cm3/min. The possibility of using gas correction coefficients, the most commonly used gases are listed in the leaker database. The accuracy of maintaining a given proportion of gases is 5%. The accuracy of maintaining the specified gas flow rates is 3%. Input pressures from 1 to 4 atm. Electric power supply from a single—phase AC network with voltage from 187 to 242 V, frequency (50 ± 1) Hz, operating mode - continuous. Power consumption (without a personal computer), no more than — 30 VA. Overall dimensions (width × depth × height), no more than 165×350×215 mm. Weight, not more than 5.5 kg.

The sulfur analyzer ASV-2 is designed to measure the mass fraction of sulfur in gasoline (unleaded), diesel fuel, oil, kerosene, oil residues, lubricating oil bases, hydraulic oils, jet fuels, crude oil and other distillate oil products. The ASV-2 analyzer allows to perform the functions of determining sulfur both in the vacuum mode of the measuring chamber and in the helium purge mode. For this purpose the device is equipped with a set of accessories for connection of the analyzer to the helium post.

Designed for laboratory production of nitrogen of the highest purity that are used to power analytical instruments (chromatographs, express analyzers of hydrogen content in metals, organic carbon concentration meters, sample evaporators, etc.), boxes with an inert atmosphere.

High-pressure syringe pump (NSHVD-1) with a continuous highly stable fluid flow in a wide flow range of 0.01-10ml/min. with the functions of introducing a correction factor after calibration, setting the volume or pumping time, displaying the amount of pumped, temporary suspension of pumping with automatic resumption, the ability to adjust the flow and volume of the pumped liquid during operation without stops, automatic shut-off of the pump when the set maximum pressure is exceeded, remote control, compensation for changes in the mass flow rate of the liquid pumped by the pump when its temperature changes. TECHNICAL CHARACTERISTICS Flow range, ml/min 0.01 - 10 Dosing error, % 0.2 The discreteness of the task, % 0.01 Maximum working pressure, 12 bar Lifting height of the suction fluid, m2 Accuracy of pressure measurement, % 0.2 The maximum liquid temperature is 60 °C Modbus RTU communication interface Power supply AC 220 V, 50 Hz Dimensions: W x D x H, mm 140 x 335 x 270 Materials in contact with the pumped liquid glass, fluoroplast, stainless steel 316 L

The main difference between this set-top box and the universal set-top box of the NPVO and ZDO is that a prism is used as a working element of the MNPVO, which allows to obtain several reflections from the area of contact with the sample under study, which leads to an improvement in the quality of the spectrum and an increase in the sensitivity of the method (absorption bands become more pronounced). The registration of specular and diffuse reflection spectra (ZDO) is not provided on this set-top box. The MNPVO prefix is effective in registering the absorption spectra of samples whose dimensions (number) are sufficient to ensure contact with the entire area of the working face of the prism: * liquids of any degree of viscosity (solutions, suspensions, oils, etc.); * solid elastic samples (polymer fragments of sufficiently large size, rubbers, plastics, etc.); * powdered samples in quantities sufficient to be applied to the entire surface and samples in the form of thin tapes; The universal clamp is equipped with a precision lever mechanism for quickly lowering the tip and a micrometer screw that allows you to pre–set the optimal degree of pressure - this ensures quick sample change and repeatability of the results during measurements. For convenience when working with liquid and paste-like samples, it is possible to rotate the clamping console by 180o. Note: the MNPVO prefix does not exclude the possibility of registering the spectra of samples whose dimensions are smaller than the area of the working face of the prism (the presence of a visual inspection system of the surface under study increases convenience when working with small-sized objects), but the overall effectiveness of the method is significantly lower than when using the universal NPVO and ZDO prefix. Transmission in the operating range of the spectrum, % of the input signal of at least 25 · The recommended number of scans when registering spectra is 25 · Spectrum registration time at 25 scans (resolution 4 cm-1), 30 seconds · The depth of penetration of radiation into the sample, microns 5 – 15 · Minimum area of a solid sample, mm2 1 · Minimum volume of the test liquid, ml 0.3 · The permissible pH range of the analyzed objects is from 5 to 9 · Crystal substrate material ZnSe CVD, Ge · Diameter of the focus spot, mm 3 · Number of reflections 3 · The size of the working face of the prism, mm 21 X 6 · Magnification of the 4X micro lens · Total magnification of the visual channel 75X · Field of view of the optical system, mm 2 X 2.5 · Digital video camera resolution 640 X 480 · Overall dimensions, mm 145×125×240 · Weight, kg 2

Desiccator 2-210 mm Primelab is designed to isolate the contents from the external environment and protect from moisture due to the missing tap. Protects the contents from direct exposure to ultraviolet rays due to the fact that the desiccator is made of dark glass. Main advantages: • Robust and reliable design; • Ease of use; • Precise regulation of storage conditions. Dimensions: desiccator diameter is 210 mm with a height of 275 mm