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Designed to control the pressure and flow rate of non-aggressive gases in the lines of chromatographic and other analytical equipment. The measurement of gas flow is based on the conversion of the mass flow rate of gas into an electrical signal by the calorimetric method. The measured gas flow and pressure are displayed on a digital indicator. The device has an external RS485 interface, operating under the MODBUS RTU protocol. technical specifications: - gas flow measurement range – from 1 to 750 ml/min; - pressure measurement range from 0 to 0.4 MPa; - gas flow measurement error – no more than ± 2% in the measurement range of 100 art. ml / min; no more than 3% in the measurement range of 100 ... 750 art. ml / min; - measurement error suppression – no more than ± 0.25 %; - measured gases: Air, Nitrogen, Hydrogen, Helium, Argon, Methane; - the presence of a function for monitoring the volume of pumped gas for a given period of time; - the presence of a function for monitoring changes in gas pressure for a given period of time;- the device is powered from an external power source + 15V (an adapter for operation from a 220V 50Hz network is included in the delivery package).