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Effective Gas Measurement using KOBOLD’s DMS and MAS Flow Measurement Devices

KOBOLD tell us that, “The MAS device replaces the need for a float principle whilst the DMS digital meter is virtually fault-free, highly resistant and able to maintain accurate measurement in aggressive gas environments.” Let's take a closer look.

Mass Flow Measurement of Gases

Mass flowmeter

Using the calorimetric method of measurement, the MAS mass flow meter is specifically designed for gas flow measurement.The MAS's sophisticated measuring procedure, and modern electronics, make it suitable for a wide range of applications and greatly simplifies the measuring of gas flow by replacing the need for devices that depend on the float principle.

The low heat capacity of the measuring tube, and the low mass of the auxiliary flow, guarantees a fast response time. The electronics embedded in the MAS automatically take pressure and temperature changes into account, enabling it to be used within a large pressure and temperature range without the need for adjustment.

Features of the Mas Flow Meter:

  • Direct mass flow measurement
  • No pressure or temperature correction needed
  • Large measuring range
  • Negligible pressure loss
  • May be fitted in any position
  • High degree of repeatability
  • Analogue output 0-5 VDC Option 4- 20 mA

Typical applications for the Mas Flow Meter:

  • Process Controls
  • Laboratories
  • Gas Display Tables
  • OEM Applications
  • Leakage Rate Testing
  • Filter Monitoring
  • Gas Flow Calibration

Fields of application

The KOBOLD MAS model mass flow meter makes very precise measurements of the mass flow rate of gases in different measuring ranges from 0-10 Nml/min to 0 - 500 Nl/min nitrogen. The operation 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 DMS Dosage by Mass

The DMS digital flow meter is designed to record the mass of gases and is unaffected by the pressure and temperature of the medium. These measuring devices work by using the bypass capillary system and are suitable for any installation position. With no moving parts, DMS devices are available as flow meter and flow regulator, and are virtually fault-free.

Features of the DMS Flow Meter

  • Measuring range: 0,1 -3,7 Nml/min & 0 -185 NI/min air
  • Accuracy: ± 1% of full scale
  • pmax: 35 bar; tmax: 50°C
  • Connection: 1/8" - 1/2" compression fitting 1/4-1/2 FNPT; 1/4 VCO; 1/2 vCO; 1/4 VCR; 1/2 VCR
  • Sensor casing: Stainless steel
  • Preset for 10 gases

KOBOLD say, “Compared with float flow meters, the DMS mass flow meter has neither moving parts, nor is it necessary to compensate for changes in operating conditions such as pressure and temperature, because here the mass flow is being measured.

“The measuring instrument can be installed in practically any position and the simple mechanical construction provides the highest degree of reliability, both with the use of aggressive gases, and also in raw industrial operation.” Visit KOBOLD for more information.

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