A Bronkhorst company

MASS-VIEW flow regulator with display for He [20 .. 200 mln/min]

Online price starting at: $865.38

  • Model: MV-391-HE
  • Shipping Weight: 0.7kg
  • Brand: MASS-VIEW

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Limited stock available, </br> book now to avoid disappointment.
Limited stock available,
book now to avoid disappointment.

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Features of mass flow regulator

  • Clear indication in:
    - actual flow rate (bar graph and value)
    - desired flow units
    - type of gas
    - totalised flow
  • Bright, wide-angle OLED display
  • Free of parallax error
  • Virtually independent of temperature and
    pressure variations
  • Low pressure drop
  • Wide flow ranges
  • Fast response
  • High accuracy
  • Electronic output:
    - Analog (0 .. 5 Vdc)
    - RS-232 interface (with FLOWBUS)
    - Modbus-RTU/ASCII interface
  • Configurable password protection
  • Alarm and counter functions
  • Relays
  • Multi Range
  • High resolution needle valve
  • Digitally calibrated
  • Free software tools

Scope of delivery

  • MASS-VIEW flow regulator
  • packing box
  • 9.17.054 Short form manual
  • (optional) fittings
  • (optional) power supply
  • (optional) Battery Pack

Download icon Download technical information of the MASS-VIEW

Pre-installed ranges


Flow range (relative He)

Range 1
20 mln/min .. 200 mln/min (sccm)
Range 2
20 mln/min .. 100 mln/min (sccm)
Range 3
20 mln/min .. 50 mln/min (sccm)

Please note:
Our mass flow regulators are sold without fittings and without powersupply , please use the 'Complementary products' tab to order additional accessories. For your convenience, we also have our flow ranges in other flow units.



Technical Specifications



Accuracy 2% RD for flow > 50% of max. capacity
(1% RD + 0.5% FS) on lower flows
Repeatability < 0.2% FS typical
Pre-installed gases He
Standard calibration gas He
Rangeability up to 1:20
Operating pressure 0 .. 10 bar(g) / 0 .. 150 psi(g)
Pressure coefficient
0.2% / bar typical at Air
Operating temperature 0 .. 50C (32 .. 122F)
Temperature coefficient Zero: <0.1%FS/C, Span: <0.2%RD/C
Attidude sensitivity < 0.1% FS
Response time (t63%) 2 s

* Notes:
- Mass flow units ln/min and SLM refer to normal operating conditions,
i.e. 0C (32F) and 1013 mbar (14.7 psi)
- Technical specifications are based on Air at maximum FS
- All specifications subject to change without notice



Materials (wetted parts) Meter: aluminium, Viton
Needle Valve: Fluorisint, Brass, Buna N
Gas connections (in/out) G 1/4"BSPP female



Electrical connection 8-pin RJ-45 modular jack
Output analog: 0 .. 5 Vdc
digital: RS232 / RS485 (Modbus-RTU/ASCII)
Required supply voltage 15 .. 24 Vdc ( 10%)
Power consumption approx. 135 mA/ 2W
Min. and max. relay contracts switching current 0.5 A, 24 Vdc
one side grounded (0 Vdc power)



Test pressure 21 bar (a) / 300 psi (a)
Ingress protection IP-40
Leak integrity (outboard) < 1 x 10-9 mbar l/s He
EMC EU declaration

Electrical Connection

Electrical Connection of Mass Flow Regulator

Display Menu

The 4-way button with center push gives access to a user-friendly menu, e.g. for zero function, for selection of pre-installed gases in pre-installed ranges, setting of engineering units, alarm functions (minimum/maximum/counter limit) and counter functions. Password protection is provided to prevent unauthorizes changes. Below overview of the MASS-VIEW menu functions illustrates the great versatility of this product line.Display Menu of Mass Flow Regulator



Dimensions of Mass Flow Regulator



Download our technical documentation and software/drivers related to the MASS-VIEW Series



The fields of application for MASS-VIEW flow regulators are diverse:
  • Welding (welding gas monitoring)
  • Leak measurements (quality)
  • Measurements of gas consumption
  • Test equipment (production maintenance)
  • Local preparation of a gas mixture
  • Flow rate monitoring (laboratories)
  • Cost centre billing
  • Analytical equipment


MASS-VIEW flow regulator with display for He [20 .. 200 mln/min]
MASS-VIEW flow regulator with display for He [20 .. 200 mln/min]

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