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The pure nitrogen generator (hereinafter referred to as the generator) is designed to produce in laboratory conditions nitrogen of the highest purity that is used to power analytical instruments (chromatographs, including those equipped with an electronic capture detector, express analyzers of hydrogen content in metals, organic carbon concentration meters, sample evaporators, etc.). Technical specifications The grade of nitrogen produced according to GOST 9293-74 is high purity, grade I Volume fraction of nitrogen is not less than, % by volume (including impurities of inert gases — argon, neon, helium) 99.999 Volume fraction of oxygen is not more than, % vol. 0.0005 (5 ppm) Volume fraction of water vapor is not more than, % vol. 0.0007 (7 ppm) The volume fraction of the sum of carbon-containing compounds in terms of methane is not more than, % vol. (ppm) * (with a methane content in the supply air of not more than 4 ppm) 0.0003 (3 ppm) Maximum nitrogen capacity is not less than 60 l/hour (1.0 l/min) Nominal output pressure of nitrogen with the throttle open) 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 8 ati Minimum inlet air pressure is 5.5 ati Compressed air consumption, at nominal inlet pressure and maximum flow rate is no more than, l/hour, 1800 (30 l/min) Power consumption is not more than, VA, 100 Overall dimensions, (width x depth x height) are not more than, mm, 220x540x670 Weight is not more than, kg 32 Working conditions: ambient temperature, C°, from +10 to +35 Electric power supply from single-phase AC mains voltage, V, 220± 10% and frequency, Hz, 50 ± 1 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

The nitrogen generator is designed to create an inert atmosphere, fill low-pressure tanks, "wash" test tubes with inert gas and other applications that require a large, by laboratory standards, nitrogen consumption with reduced requirements for its purity. Technical specifications Volume fraction of nitrogen is not less than 99.5 % by volume (including impurities of inert gases — argon, neon, helium) Volume fraction of oxygen is not more than 0.5 % vol. Volume fraction of water vapor is not more than 0.002 % vol. (20 ppm) Maximum nitrogen capacity: at an inlet air pressure of 8 ati is at least 600 l/h (10 l/min) at an inlet air pressure of 6 ati is at least 480 l/h (8 l/min) The time of setting the operating mode for single-shift operation is no more than 30 min Nominal inlet air pressure is 8 ati Maximum allowable inlet air pressure is 8.5 ati Minimum inlet air pressure is 7.5 ati Compressed air consumption, at nominal inlet pressure and maximum flow rate is no more than 3600 l/hour (60 l/min) Overall dimensions, (width x depth x height) are not more than 230x580x680 mm Weight is not more than 32 kg Working conditions: ambient temperature, C°, is from +10 to +35 Electric power supply from single-phase AC mains voltage, V, 220± 10% and frequency, Hz, 50 ± 1 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

It is designed to measure the temperature during the transportation of petroleum products, namely, to make a temperature correction for the volumetric expansion of petroleum products. The density of petroleum products decreases significantly with increasing temperatures, and the volume of the product increases, the kit "Oilman-1" allows temperature measurements for the subsequent calculation of the volumetric expansion of petroleum products. •

Designed to measure the temperature and humidity of indoor air, the surface of heating appliances, water temperature in heating and hot water systems. •

NV-1200 PX are wall-mounted tables with plumbing and superstructure in the NV line. The table top is 70 cm deep and 121.8 cm wide. A lamp and two sockets are built into the superstructure. It is designed for standing work: the height of the table top is 85 cm. External dimensions of the table (W×D×H): 1218×700×1650 mm. Work surface for your tasks We offer tables with various work surfaces. Table Model: Tabletop NV-1200 PLH: Laminate. It is relatively moisture-resistant, resistant to short-term exposure to acids, alkalis and organic solvents. This countertop does not tolerate strong heating or prolonged exposure to solvents, concentrated acids and alkalis. NV-1200 PKH: Porcelain tile. It is a practical solution for most chemical, biological, medical laboratories and workshops. You can put drying cabinets, baths and other heating devices on it. NV-1200 PSPH: Chemically resistant plastic. It is a good choice for training workshops, analytical and medical laboratories. It does not tolerate high temperatures well, heating devices should not be placed on the surface. NV-1200 PPX: Polypropylene. It is chemically resistant, beind a specialized solution for chemical laboratories that work a lot with concentrated inorganic acids and alkalis. It is not resistant to high temperatures. A table for convenient work in the laboratory The superstructure allows you to compactly place the necessary reagents and laboratory utensils next to the workplace. Its depth is 25 cm, and its height is 80 cm. The table has plumbing fixtures: a faucet and a small sink-drain made of polypropylene resistant to aggressive chemicals are built into the countertop. Its diameter is 135 mm and its depth is 110 mm. The working area is illuminated by a fluorescent lamp (included in the package). The switch is located on the left-hand side of the superstructure. There are also two sockets, one of which is grounded. Sockets have the IP20 degree of protection, maximum load: 1.5 kW. The side laminated panels of the table (chipboard 16 mm thick) are edged with a 2 mm PVC edge, which increases their impact resistance and mechanical strength. The legs of the table are adjustable in height within two centimeters, allowing you to place it even on a rather uneven floor. Advantages of NV-1200 PH tables An inexpensive solution for laboratories that value the reliability and durability of furniture; The working surface can be selected based on the needs of your laboratory; It is convenient to work while standing: the height of the working surface is 85 cm; On the shelves and in the drawers of the table you can store accessories to the devices on the table, laboratory utensils or reagents. Application of NV-1200 PX tables Tables of the NV series are used in laboratories of the widest profile: at food and light industry enterprises, in scientific and educational workshops, in chemistry classrooms, quality control centers, medical organizations and many others.

METOLAB 102 is a stationary hardness tester, a modification of the METOLAB 100 and METOLAB 101 devices with extended functional characteristics. The main difference of this model is a fully automated measurement process. The METOLAB 102 hardness tester allows you to control the parameters of various materials and products using the Rockwell method, HRA, HRB, HRC scales. It is also worth mentioning the opportunity to print promptly measurement results on the built-in printer, the functional opportunity to convert the results into the Vickers, Brinell and Super-Rockwell scales. Structurally, the METOLAB 102 hardness tester is a stationary device consisting of a load application mechanism and the measuring unit itself. The principle of operation of the device is based on the indentation of a diamond cone or steel ball tip into the material under study, followed by measurement of the resulting print. Due to its ease of operation, the stationary METOLAB 100 hardness tester can find its application in a wide variety of industries and production, as well as in educational institutions of various levels in the training of specialists. The stationary METOLAB 102 Rockwell hardness tester is included in the State Register of Measuring Instruments of Russia (GRSI) and comes with a certificate of primary verification (on request). The number in the GRSI is 65128-16. Distinctive features of the stationary METOLAB 102 Rockwell hardness tester: Simplicity and convenience in operation and maintenance; Large and bright LCD screen, fully Russian-language menu, output of all necessary information; Wide range of measured values; Ability to convert results to Brinell, Vickers, Super-Rockwell scales; Built-in printer for quick printing of measurement results; High degree of reliability of the hardness tester. Basic delivery package: Stationary METOLAB 102 hardness tester; Indenter with a ball (1.5875 mm) - 1 pc.; Conical diamond indenter (120°) - 1 pc.; Flat table SP1 (60 mm); V-shaped prismatic table SRP1 (40 mm); Rockwell hardness measures - 1 set; User Manual.

Technical specifications Supply voltage, V 220 Rated network frequency, Hz 50 Rotation speed range, rpm 300-1500 Overall dimensions, diameter/height, mm 125/50 Weight, kg 0,5 Stirrer housing Polypropylene Stirrer surface (chemically resistant material) Polypropylene Mixing volume, max, l 1 Operating conditions Ambient air temperature, °C 5 … 40 Relative humidity at 25 °C, % up to 90 Atmospheric pressure, kPa/mmHg. 84,0 … 106.7/ 630 … 800

the lifting of the hood is carried out automatically by means of a pneumatic cylinder; an accelerated cooling system is provided in the furnace; Type of furnace:muffle (hood-shaped)

Vascular Endothelial Growth Factor is one of the key regulators of angiogenesis. The most important role in the human body is played by a protein of the VEGF family called VEGF-A. VEGF-A is a 45 kDa glycoprotein homodimer and plays a key role in chemotaxis and angioblast differentiation, endotheliocyte (EC) proliferation, vasculogenesis, and vascular remodeling. As a result of alternative splicing or proteolytic cleavage, 4 main isoforms of VEGF-A are formed, consisting of 121, 165, 189, or 206 amino acid residues.

The NV-800 SCb is a large specialized laboratory table with a damping concrete slab on a sand cushion. It is designed to accommodate centrifuges, sieves and other devices that vibrate strongly during operation. Dimensions when assembled: 860×860×750 mm. The table has a reinforced metal frame. The main countertop has a built-in drawer open from above, which contains a sand cushion. It is closed with a heavy concrete slab, which is attached to a second, smaller countertop. The sand cushion and the concrete base of the second countertop provide good protection against vibrations. The size of the anti-vibration countertop: 660×660 mm. Like the main countertop, it is made of chipboard, and visually they do not differ from each other. The table has a metal frame painted with white powder paint. The side laminated panels (chipboard with a thickness of 16 mm) are edged with a durable PVC edge with a thickness of 2 mm, which increases their impact resistance and mechanical strength. The legs of the table are adjustable in height within two centimeters, allowing you to place it even on a rather uneven floor.

The AC voltage source B2-7 is intended to provide devices and equipment with a stabilized AC voltage during the development, production, operation and repair of electronic devices. Main properties: Provides protection against overload and short circuits at the output. Has a light indication: - overload and short circuit protection tripping; - incorrect connection of the power supply line to B2-7. Technical specifications The nominal value of the output voltage (SKZ) 220 V The nominal value of the input and output voltage frequency is 50 Hz Output electrical power, not less than 1000 VA The main error in setting the output voltage is ± 2.2 V Additional error in setting the output voltage caused by a deviation of the input voltage by ± 10% from the nominal value of 220 V ± 1.0 V Additional error in setting the output voltage caused by a change in the load current from the maximum value to zero ± 2.0 V Instability of the output voltage for any 10 minutes during 8 hours of continuous operation, no more than ± 2.0 V Operating temperature range from -10 to 50 °C AC power supply 220 V, 50 Hz Power consumption, no more than 1200 VA Overall dimensions, mm 240x128x349 Weight, not more than 6.5 kg

METOLAB 202 is a stationary automatic hardness tester designed to measure the hardness parameters of various materials and products on the A, B, C Rockwell scales and the HR15N, HR30N, HR30T, HR45N Super-Rockwell scales. The device has a large and bright display, which displays all the necessary service information, and is also equipped with a built-in mini-printer, so that it is possible to quickly print out the information received on paper. Other features of the METOLAB 202 hardness tester include a fully Russified menu, a wide range of measured values, as well as full compliance of measurements with current standards, including BS.EN 10109 and ISO716. The stationary METOLAB 202 hardness tester allows you to apply a loading force in 15, 30, 45, 60, 100, 150 kgf and preload 3 kgf, 10 kgf. The device is entered in the State Register of Measuring Instruments of the Russian Federation (GRSI) under the number 65128-16 and comes with a certificate of primary verification (on request). Regulatory and technical documents establishing requirements for the METOLAB 202 hardness tester: GOST 8.064-94 GSI. State verification scheme for hardness measuring instruments on the Rockwell and Super-Rockwell scales; GOST 9013-59 Metals and alloys. Rockwell hardness measurement method. Scales A, B, C; GOST 22975-78 Metals and alloys. Rockwell hardness measurement method at low loads (Super-Rockwell); GOST 23677-79 Hardness testers for metals. General technical requirements. Distinctive features of the stationary METOLAB 202 hardness tester: All measurements take place in fully automatic mode; The ability to set the upper and lower measurement limits, audible alarm when the results exceed the set values; Opportunity to process statistical data – calculation of minimum/average/maximum values, as well as other functions; Conversion of the obtained results into the Vickers, Brinell and Super-Rockwell scales; Correction for curvature of cylindrical and spherical parts; Simple and intuitive interface in Russian. Basic package of delivery: Stationary Metolab 202 Rockwell hardness tester; Indenter with a ball (1.5875 mm) - 1 pc.; Conical diamond indenter (120°) - 1 pc.; Flat table SP1 (60 mm); V-shaped prismatic table SRP1 (40 mm); Rockwell and Super-Rockwell Hardness Measures; User Manual.