Description 

VMH100 Thermal Mass Flowmeter is one of the most advanced flowmeter in gas mass monitoring. The sensor of VMH100 Thermal Mass Flowmeter is related to flow rate of the gas mass and meet the situation which the temperature and pressure is unstable.

Classic Application  
 1.  Industrial and process gas mass flow
 2   Fuel flow for burners and fuel cells
 3.  NOx control using ammonia.
 4.  Aeration air and Digester gas for waste water treatment facilities
 5.  Compressed air 
 6.  Metering semi-conductor gases
7.  Chlorine metering in the paper industry
8.  Solvent and VOC recovery
9.  Air sampling 
10. General purpose mass flow, R&D
11. Flow calibration standards 

Features 
1. Measures mass flow directly,
2. no separate temperature or pressure inputs required 
3.  Built-in flow conditioner which eliminates velocity-profile distortions caused by upstream disturbances 
4.The Ultra High Purity meters are constructed of 316L electro-polished,
stainless-steel with a 7-10  Ra interior finish
5.Field adjustment of critical flow meter settings via on-board switches
or Smart Interface™ (RS 232)
6. Field validation of flow meter  calibration
7.  Outstanding rangeability 
8. CE approved

Principle of Operation 
DOMINANT HEAT TRANSFER COMPONENT FOR A
THERMAL FLOW METER IS "FORCED CONVECTION"
Q = h*A*deltaT
Where Q = Power Dissipated by Sensor
h = Convective Film Coefficient
A = Heated Area of Sensor
deltaT= Temperature of
Heated Sensor Above Gas Temperature
       
Performance Specifications
1. Accuracy
+/- 1% of reading 
2. Repeatability
+/- 0.2% of full scale
3. The temperature of medium:
 -10ºC~125ºC
 -10ºC~250ºC
4. Environment temperature:-10ºC~55ºC
5. Operating pressure: 0 ~ 6.4MPa
6. Display: totalize 10 characteristic, instantaneous 6 characteristic 
7. Signal Output:4~20mA, RS485, Hart
8. Power: 24V DC±10 %,≥350mA,  220VAC
9. Water-proof:  IP65, IP68 
10. Gases Type:
Argon, helium, hydrogen, nitrogen, oxygen (consult factory for other gases)

Main Technical Parameters
For insertion type gas flow meter, the measuring ranges are as follows:
a.0~0.5 m/s;  b.0~1.0 m/s;  c.0~2.5 m/s;  d. 0~5.0 m/s;   e. 0~10.0 m/s;  f. 0~25.0 m/s;   g. 0~50.0 m/s;   h. 0~60.0m/s
Performance Characteristics
-   high precision, fast response speed, wide measurement range;
-   no moving parts, stable and reliable, long service life;
-   flexible pattern diversity, plug-in, on-line, rectifier, separation, and other forms;
-   easy installation, can be installed in screw-type, flange type;
-   also can match with continuous flow device installation: explosion-proof, protection, corrosion protection design, thus it can adapt to bad working condition and dangerous situation;
-   minimal pressure loss, almost negligible

Packaging & Shipping
  Paper carton  in standard packages or according to buyer's requirement

Our Services
Contact us for the following services:
- Technical, application, start-up and troubleshooting assistance on-site
- Traning on-site or at our corporate office
- Service calls
- Equipment updates to our latest configuration

Company Information
Incontrol is a joint venture established by Pilot Group and Brazil Incontrol, professional in measuring flow and providing related technical solutions.