MASS-STREAM Models
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MASS-STREAM mass flow meters (MFM) for gases are based on the thermal through-flow measurement principle. Their field-proven design has been exclusively used by Bronkhorst Instruments in Germany since 1997. Unlike thermal bypass flow meters, all gas flows through a straight channel, making MASS-STREAM instruments less sensitive to moisture or particulates and easier to clean. Mass Flow ONLINE has selected four models for their online sales channel, covering a wide measurement range, from 0,5 to 50 up to 10 to 1000 ln/min Air equivalent. Each MFM is equipped with an on-board display for indicating actual flow, totalized flow, and alarms. These instruments find applications in many industries, such as process gas measurement in the food industry, chemical and petrochemical industries, fermentation installations, and biotechnology. Measurement / control system Accuracy (incl. linearity) : ± 1,0 % Rd plus ± 0,5 % FS (based on actual calibration) Turndown Repeatability Operating pressure Response time sensor (63 %) Temperature range Temperature sensitivity Leak integrity (outboard) Attitude sensitivity Warm-up time 1 : 100 (1.100%) < ± 0,2% FS 0.10 bar(g) approx. 0,9 seconds 0.50°C ± 0,1 % Rd / °C (Air) < 2 x 10-8 mbar l/s He max. error at 90° off horizontal 0,2% FS at 1 bar, typical N2 : 30 min. for optimum accuracy, within 30 seconds for accuracy ± 4% FS Electrical properties Power supply Power consumption Analog output/command Digital communication Electrical connection > Models : +15.24 Vdc ±10% : approx. 105 mA at 0 % flow approx. 155 mA at 100 % flow : 4.20 mA (sourcing output) : RS232 : 8 Din (male) Model Flow (Air) Connection Analog output MS-105 up to 50 ln/min G W 4.20 mA Mechanical parts Sensor Instrument body Sieves and rings Process connections Seals Ingress protection (housing) : Stainless steel 316L (AISI 316) : Aluminium EN AW-6082-T6 : Stainless steel SS 316 : Female gas thread (ISO1179-1); MS-105: G y4” BSPP female thread MS-106/108/109: G W BSPP female thread (compression fittings optional) : FKM (Viton®) : IP65 Max. capacities in ln/min (SLM) per model for various gases > Warranty All instruments and accessories are warranted for a period of 3 years from delivery date.

> On-board FLUIDAT® gas database Simply select your process gas. With the on-board gas database, switching to another gas or gas mixture is effortless and does not require recalibration. MASS-STREAM mass flow meters come factory calibrated with Air as the standard. If other gases or gas mixtures are used, the on-board gas database (FLUIDAT Onboard) applies the necessary conversion. The conversion depends on the physical properties of the gas and the process parameters, such as media temperature and operating pressure. The highly accurate FLUIDAT gas database ensures best-in-class conversion...