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When determining the total gas content (air) and humidity of transformer oil, direct injection of transformer oil into the evaporator of the chromatograph is used. The sample volume is up to 25 µl, the evaporator temperature is 250-350 °C. The main problem with such an input is the protection of the chromatographic column from transformer oil. For this purpose, a special evaporator is used with the possibility of oil accumulation at the bottom of the evaporator and its subsequent discharge, and a replaceable pre-column that protects the column from oil residues that have passed the evaporator. technical specifications The volume of the evaporator is 10 ml. The number of replaceable pre—columns in the device kit is 5. The temperature of the evaporator is from 250 to 350 °C. The possibility of draining the transformer oil accumulated in the evaporator.

Selective detector for organophosphorus and nitrogen compounds. It is also sensitive to compounds containing C, Az, but to a lesser extent. The sensitivity depends on the number of heteroatoms in the molecule. Selectivity to hydrocarbons is 104 for nitrogen, and 105 for phosphorus Technical characteristic: 2.0*10-13 m/s nitrogen 1.5*10`14 g/s for phosphorus

It operates in the mode of a helium ionization detector (GID) and is considered the most sensitive device for determining permanent gases. In addition, it is able to work in the EDD mode. Technical characteristic: 2.0*10`13 g/s by. methane or hydrogen

It can be used as a primary source of carrier gas, since it is equipped with an additional gas purification system. This device is especially relevant when, for some reason, helium is not available to the consumer (for example, when working with a thermal conductivity detector - an accident). Due to the high thermal conductivity of hydrogen, TTP operates with significantly greater sensitivity than helium.

Device for dosing of liquefied gases is made for insertion of liquids and liquefied gases under the pressure of 7 MPa into the chromatograph. Injection of liquefied gas without de-gassing is provided by cooling of valve, and it greatly reduces inaccuracy of the analysis results. Cooling temperature is set by temperature regulator. Visual control of absence of de-gassing and flow control of the analyzed fluid is provided. Dose volume is form 0.2 to 2 mcl. Valve of VICI production or dispenser valve of our own production is used directly as a sample-valve.

TDS-2 is a syringe (see Fig. 1), which is installed on the evaporator of the chromatograph. The device is equipped with a crane that cuts off the carrier gas line when removing the rod with the sorption tube from the thermal desorber. When the tap is open, the stem is lowered to the lower position and the sorption tube is inserted into the evaporator brought to the desired temperature. In the conditions of the upper position of the rod, it is also possible to displace air by purging the sorption tube with a carrier gas. Technical characteristics of TDS-2 The heating time to the desorption temperature is no more than 1 sec. The cooling time when moving to a cold zone is no more than 10 seconds. Outer diameter 5-0.1 mm Dimensions of the sorbent chamber: diameter 3.4+0.3 mm length 52 mm (470 µl) Volume (for solid samples) 90 µl Operating temperature ranges* from 50° to 400 °C Overall dimensions (height with the rod fully extended) 320 mm. Weight 0.325 kg.

The metering valve for the analysis of liquefied gas (KDSG) is designed for the introduction of liquefied gas or other liquid under excessive pressure into the evaporator of the chromatograph. KDSG is a 4-way crane, in which a dose of a certain volume is installed. The tap is installed on the evaporator of the chromatograph. A dose of any volume can be installed on the tap. Dose change can be performed by the operator. The amount of the dose volume is indicated on the tag. Technical specifications The dose volume is from 0.25 to 4.0 µl (at the request of the consumer, the dose volume can be increased up to 10 µl). The tap temperature is no more than 150 °C. The pressure in the crane line is not more than 0.48 MPa. The angle of rotation of the crane handle is 90 °C.

To analyze small concentrations of carbon monoxide (CO) and carbon dioxide (CO2), instead of the usual catarometer for these gases, a more sensitive PID is used, while carbon oxides are converted into methane (CH4) using reaction chromatography. The device implementing the conversion reaction is called a methanator, i.e. a device with a special catalyst that converts CO, CO2 into methane in a hydrogen current, while the latter is either a carrier gas itself, or is blown together with the carrier gas into the methanator through a tee. The methanator provides a highly efficient conversion reaction, while the detection limit of carbon oxides reaches 0.1 ppm. technical specifications Metanation temperature — 330 °C The coefficient of metanation is not less than 95 % The effective volume of the methanator is 1 ml.

The most common, universal detector that is suitable for the analysis of a wide range of organic compounds. The sensitivity depends mainly on the number of carbon atoms. In combination with a methanator, it allows the analysis of carbon oxides at the level of 0.1 Rt. The level of fluctuation noise is up to 50 MV, the maximum signal is up to 2500 V. Technical characteristic: 1.2*10712 gs/s for hydrocarbons

To determine small concentrations of substances, in some cases it is impossible to do without their concentration in special traps. An example of the need for such concentration is the determination of impurities in permanent gases (Ne, He, H2, Ar, O2, N2, Kr, Xe), the concentration of impurities is less than 1 ppm. Considering that these impurities can be not only hydrocarbons, but also permanent gases themselves, the use of direct detection of impurities by a catarometer is impossible. It is also not always possible to use highly sensitive but expensive detectors (GID, EDD, etc.). TECHNICAL CHARACTERISTICS The volume of the trap is 5 ml. The volume of the Dewar vessel (serial metal thermos) is 1200 ml. The concentration temperature range is from minus 88.6 (ethane) to minus 269 °C (helium). The ability to calibrate the chromatograph from the cylinder without disturbing the gas circuit. The possibility, simultaneously with concentration, to purify the gas intended for purging the trap from impurities (in a similar trap). Overall dimensions, no more than — 290 ×470 × 615 mm. Weight, not more than — 8 kg.

They are used for sampling natural and liquefied gas. In the company "Meta-chrome" you can buy the following gas samplers: PGO-50M; PGO-400; BDP 12-2-9,8 (aluminum, subcompact); PU. The PGO-50 M, PGO-400 and PU models are used to take samples of liquefied hydrocarbon gases that are affected by the overpressure of stationary tanks and or their own vapors. Sampling is carried out according to GOST 14921-78. The BTP 12-2-9.8 device is used for sampling, storing and transporting samples of gases that are under pressure. The device is made of aluminum and is designed for a small liter. Sampling is carried out according to GOST 31370-2008. INDICATOR BDP7 BDP7 BDP12 BDP12 BDP16 PGO-400 PGO-50M Volume, l. 0,7 1 2 4 10 0,4 0,05 Outer diameter, mm 70 70 120 120 160 50 35 Length, mm 360 480 368 593 800 400 325 Working pressure, MPa 9.8 5.0 9.0 The number of refills up to the operating pressure, times at least 5000 Case material AMg6M 12X18

The reverse purge valve is a 4-way valve designed to change the direction of the flow of the eluent through the nozzle column and blow off heavy components from the beginning of the column in the opposite direction into the detector. The crane is attached to the bottom panel (bottom) of the module, while taking the temperature of the column thermostat. The two upper fittings (see Fig.) are used to connect the column, the other two are connected to the evaporator and the detector.