Differential pressure flow meter MAS

thermalmassfor liquids

The KOBOLD MAS model mass flowmeter makes very précisé measurements of the mass flow rate of gases in différent measuring ranges from 0-10 Nml/min to 0-500 NI/min nitrogen. The opération of the meter is based on the calorimetric principle. For indication of 98% of the actual flow, the response time is 2 s. The meter may be installed in any position. In contrast with most volumetric flowmeters, no temperature or pressure correction is required. This means that the MAS model is ideally suited for almost every gas flow application. Typical industrial applications are process control, laboratory measuring tasks, OEM applications, gas indication panels, leakage and filter monitoring.The MAS is available either with analogue output only, or in addition with digital indication. The 3%-digit LCD display is infinitely rotatable through 180°. Glass-fibre-reinforced Nylon® or stainless steel may be used in the manufacture of wetted parts. Seal materials is FPM (Kalrez or Neoprene upon request). The MAS model may be operated with 12-15 (24 optional). MAS-5015 or MAS-5000 are recommended as power supplies. Typically, a 0-5 Vdc (or 4-20 mA optional) analogue signal is available as output signal. This allows recording, data storage, and control functions to be implemented. Theory of Opération The medium flows through the bypass measuring system. The resulting differential pressure between P1 and P2 causes a small amount of gas to flow through the overhead measuring tube. The séparation ratio is constant. Two résistance temperature detectors (RTD elements) transferring a constant amount of heat to the gas stream are mounted on the measuring tube.