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The operation of the NVDM-250 diffusion pump is based on the capture and transfer of the pumped gas by a steam jet flowing from the slit gaps of the steam line nozzles towards the outlet flange. The oil reflector of the NVDM-250 diffusion pump is a flange with a cooling tube passing through it, soldered to a cap located in the center of the flange. The NVDM-250 open-type diffusion pump heater is a metal housing with a ceramic base laid in it with a heating element in the form of a spiral made of nichrome wire. During the operation of the pump, it is necessary to monitor the flow rate and temperature of the cooling water, the level of the working fluid and its temperature. Replacement or refilling of the working fluid depends on the operating mode of the pump (inlet pressure, pumping duration, etc.) and the composition of the pumped medium. Therefore, the time after which the working fluid is replaced or refilled can be from 100 to 1000 or more hours. A large flow rate of the working fluid is observed when the pump is operating in the range of inlet pressures from 6.6 × 10-2 to 13.3 Pa (from 5 ×10-4 to 1 ×10-1 mmHg). Water at the inlet to the cooling systems of the housing and oil reflector must be supplied with a pressure of no more than 0.5 MPa (5 kgf / cm2) and temperature from plus 4°C to plus 25°C. The recommended cooling water consumption is 100+15 l/h and is regulated by the outlet water temperature, which should not exceed plus 400C. The water drain should be free (with a jet break). Not allowed: operation of the pump without water cooling, exceeding the maximum exhaust pressure of 33.3 Pa (0.25 mmHg) The level of the working fluid during operation, at which the parameters of the pump NVDM-250 are provided, must correspond to min 8mm, max 13mm. The volume of the filled working fluid is 0.55 l

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.

The flame spectrometer is designed for rapid determination of a wide range of concentrations (up to 8 orders of magnitude) of sodium, lithium, potassium, calcium, barium, caesium, rubidium in technological solutions. The excitation of atoms occurs in an air-acetylene flame. The device consists of a three-slit burner with flame control, a pneumatic sprayer, a spray chamber, an optical radiation input system into the "Hummingbird-2" spectrometer and an automatic air and acetylene supply system, with the possibility to control and adjust gas flow. The use of a three-slit burner provides increased flame temperature over the central slit of the burner due to the external flame layers. This makes it possible to determine low concentrations of calcium and barium. At the same time, it remains the possibility to determine impurities in highly concentrated solutions without clogging the burner slots. The lighting system of the spectrometer is mirror-lens, thanks to this, radiation collected from both sides of the burner is introduced into the polychromator.

The ISO-KF connection (DIN 28 403 and ISO 2861) allows quick installation and replacement of components in vacuum systems. The connection consists of two symmetrical ISO-KF flanges (1), a centering ring with an O-ring seal (2) and a quick-release clamp (3). High-vacuum ISO-KF connections can be mounted without using a tool by simply turning the nut of the quick-release clamp.

Range: 0.8-20.0 m/s; Accuracy characteristics: PG±(0.3+0.05V) m/s; The power is supplied from a 4.8 V battery. The power consumption is 0.1 VA. Application conditions: For primary measuring transducers: from minus 30C to plus 50C in the range of 1.0–20.0 m/s; For digital measuring console: from minus 10C to plus 50C; Relative humidity 45-80% at temperature (25±10)With; Continuous operation time at negative temperatures up to minus 30C is no more than 1 hour.

Furniture for laboratory work. Washing table on a metal support stand LAB-M MO ME 120.65.90 T6F Width:1200 Depth: 650 Height: 900 Equipment: Table top – TRESPA TopLabPlus - a monolithic slab of ultra-high pressing thickness of 6 mm with a chemically resistant surface made of polyurethane–acrylic composition, the lining material is moisture-resistant plywood 15 mm thick; the table top is edged with a dark gray plastic edge 1 built–in bowl - FRIDURIT ceramics. The location of the bowl in the center, fixing the bowl flush with the level of the countertop. Inner bowl size – 400*400*250 mm The base of the sink table is a metal support pedestal. All-welded frame painted with dark grey powder paint RAL 7011. The bottom and top of the housing are sheet steel painted with dark gray powder paint RAL 7011, the side walls are made of sheet steel painted with white powder paint RAL 9016. Facades – laminated MDF of white color with a thickness of 16 mm, dark gray ABS edging

The GSH-3 hardware and software complex is designed for verification of analog and digital measuring channels of the chromatograph and analog-to-digital converters (ADCs) intended for automation of old chromatographs. The device can be used in various sectors of the national economy, in factory and research laboratories. technical specifications The resolution and sampling rate of 1 DAC is 20 bits 10 Hz. The resolution and sampling rate of 2 DACs is 16 bits 20 Hz. The amount of ROM memory is 512 KB. The voltage output range (1 output) is from 0 to 5V. The current output signal range is from 1×10-14 to 1×10-7 A (2 outputs in the range of positive and negative voltages). The relative deviation of the average steady—state value of the current or voltage of the output channel from the set value is not more than 2%. The linearity error ±1 LSB (the least significant bit) is ± 4×10-7 V. Power consumption (without a personal computer), no more than — 10 VA. Overall dimensions (width × depth × height), not more than — 230×220 × 75 mm. Weight, not more than 1.4 kg.

A trace searching kit for finding underground utilities (cable lines, metal pipelines, and other communications made of conductive materials). The kit includes a receiver in the form of a monoblock with LED indication and a compact autonomous generator with an output power of up to 20 watts and a range of up to 3 km. Connection to the desired route is possible both by contact and contactless method.

Technical characteristics: NIP, G510 Discreteness, g0,01 Calibration, self-calibration The size of the scale bowl / platform, mm116 The smallest weighing limit, g0.5 The price of the varification scale division, mg100 The limits of permissible error during primary verification, mgot 0.5g to 500 g incl. ±50; sv. 500g to 510g incl. ±100 in accordance with GOST OIML R 76-1-2011 Accuracy class according to GOST OIML R 76-1-2011II is high Adjustment weight built-in Indication setting time, s, no more than~2 7 years warranty

Technical specifications: NIP, g3100 Discreteness, g0,01 External calibration The size of the scale bowl / platform, mm175x145 The smallest weighing limit, g0.5 The price of the verification scale division, mg100 Limits of permissible error during primary verification, mgot 0.5g to 500g incl. ±50; sv. 500g to 2000g incl. ±100; sv. 2000g to 3100g incl. ±150 in accordance with GOST OIML R 76-1-2011 Accuracy class according to GOST OIML R 76-1-2011II is high The time of setting the readings, s, no more than ~3 Weight adjustment 2kgF2* 7 years warranty

Technical characteristics: NIP, G8100 Discreteness, g0,1 External calibration The size of the scale bowl / platform, mm175x145 The smallest weighing limit, g5,0 The price of the verification scale division, mg1000 Limits of permissible error during primary verification, mgot 5.0g to 5000g incl. ± 500; sv. 5000g to 8100g incl. ±1000 in accordance with GOST OIML R 76-1-2011 Accuracy class according to GOST OIML R 76-1-2011II is high The time of setting the readings, s, no more than ~2 Weight adjustment 5kgF2* 7 years warranty

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. The warranty for the device is 18 months, for the built–in compressor - 12 months from the date of sale. Technical specifications Volume fraction of nitrogen is not less than 99.5 % vol. (including impurities of inert gases — argon, neon, helium) Volume fraction of oxygen is not more than 0.5% vol. (ppm) Volume fraction of water vapor is not more than 0.002 % vol. (ppm) (20 ppm) Maximum nitrogen capacity is not less than 400 l/hour (6.66 l/min) Nitrogen outlet pressure is 4±0.2 ati The time of setting the operating mode for single-shift operation is no more than 45 min Noise level generated by the compressor is no more than 60 db Power consumption is not more than 800 VA Overall dimensions, (width x depth x height) are not more than 360x680x550 mm Weight is not more than 46 kg Operating conditions: ambient air temperature, oS from +10 to +35 electric power supply from single-phase AC voltage, 220 ± 5% frequency, Hz 50 ± 1 Average full service life is at least 6 years The generator for electrical safety meets the requirements of GOST 12.2.025-76. class 1, type