MV-391-H2 Mass flow regulator
Mass Flow Regulator for gases with integrated display
- Direct thermal mass flow measurement
- High accuracy
- Actual calibrated on Hydrogen H2
- Bright, graphical OLED display
- Digital or analog output; alarm and counter functions
- High precision needle valve
Multi gases
Valve
Pre-installed ranges
| Ranges | Flow range (relative Air) |
|---|---|
| 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) |
Pre-installed gas
| Gases | min. range .. max. range |
|---|---|
| H2 Hydrogen | 20 .. 200 mln/min (sccm) |
Features of MV-391-H2 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
- High resolution needle valve
- Digitally calibrated
- Free software tools
Scope of delivery
- MASS-VIEW flow meter
- packing box
- 9.17.054 Short form manual
- (optional) fittings
- (optional) power supply
- (optional) Battery Pack
Please note:
Our mass flow meters are sold without fittings and without power supply, please use the 'Accessories' tab to order additional accessories. For your convenience, we also have our flow ranges in other flow units.
Technical specifications
Measurement / control system
Flow range
20 mln/min .. 200 mln/min (sccm)
Mass flow units ln/min and SLM refer to normal operating conditions, i.e. 0°C (32°F) and 1013 mbar (14.7 psi)
Mass flow units ln/min and SLM refer to normal operating conditions, i.e. 0°C (32°F) and 1013 mbar (14.7 psi)
Accuracy
± 2% RD for flow > 50% of max. capacity
± (1% RD + 0.5% FS) on lower flows
Technical specifications are based on Air at maximum FS
± (1% RD + 0.5% FS) on lower flows
Technical specifications are based on Air at maximum FS
Repeatability
< 0.2% FS typical
Operating pressure
0 … 10 bar(g) / 0 … 150 psi(g)
Pressure coefficient
0.2% / bar typical at Air
Standard calibration gas
Hydrogen H2
Rangeability
up to 1:20
Response time (sensor)
(t63%) 2 seconds
Operating temperature
0 … 50 °C (32 … 122°F)
Temperature coefficient
Zero: <0.1%FS/°C, Span: <0.2%RD/°C
Leak integrity, outboard
tested < 2 x 10-9 mbar l/s He
Attitude sensitivity
< 0,1 % FS
Mechanical parts
Material (wetted parts)
Meter: aluminium, Viton® (FPM)
Needle Valve: Fluorisint, Brass, Buna N
Needle Valve: Fluorisint, Brass, Buna N
Process connections
G 1/4" BSPP female
(compression fittings optional)
(compression fittings optional)
Seals
Viton®, PTFE
Weight
0.7
kg
Ingress protection
IP40
Electrical properties
Power supply
+15 … 24 Vdc (+/- 10%)
Max. power consumption
approx. 135 mA
Output
0 .. 5 Vdc
EMC
EU declaration
Digital Communication
RS232 / RS485 (Modbus-RTU/ASCII)
Min. And max. Relay contacts
switching current 0.5 A, 24 Vdc
one side grounded (0 Vdc power)
one side grounded (0 Vdc power)
Electrical connection
8-pin RJ-45 modular jack
Product details
Downloads
Brochure & Certificate
Dimensional drawing
Stepfile
Applications
The fields of application for MASS-VIEW® mass flow meters are diverse:
- Burner Control (furnace construction)
- Welding (welding gas monitoring)
- Leak measurements (quality, environment)
- Coating (equipment construction)
- Regulation of gaseous atmospheres (biotechnology)
- Measurements of gas consumption (hospitals)
- Test equipment (production maintenance)
- Local preparation of a gas mixture
- Flow rate monitoring (laboratories)
- Cutting (steel sheets)
- Cost centre billing
- Analytical equipment
- Aeration / sparging (food products, ice cream / edible oils
- Blanketing (food)
- Fermentation (food, biotechnology, pharma)
Frequently Asked Questions
- Accuracy & Repeatability Flow meters
- Menu options on display
- Alarm settings | What kind of relay is used on Pin 3 and 5?
- Calibration Interval
- Can MASS-VIEW be used at sub-atmospheric pressure conditions?
- Can MASS-VIEW measure Humid Air?
- How to connect several MASS-VIEWs (5, 6, 7) to a RS-485 bus system?
- What is kinematic viscosity?
- Is the MASS-VIEW bidirectional?
- What is the difference between MASS-VIEW and a VA-meter?
More questions on our FAQ page