MSA - Measurement unit

Airflow measurement unit for rectangular ducts

This rectangular airflow measurement unit is available in various different sizes. Accurate measurement based on differential pressure by measurement probe pipes.

  • Measurement based on differential pressure in measurement probe created by airflow
  • Very accurate measurement
  • Measurement probes can be removed for cleaning
  • Galvanized steel design
  • Classification of casing leakage EN 1751 class C.
  • Installation independent of airflow direction

The casing of the measurement unit shall be made of galvanised steel.
The measurement probe pipes shall be made of aluminium.

Measurement shall be based on the principle of dynamic pressure difference created by airflow.
Inaccuracy of the measurement method shall be less than 10 % of the reading.

Overview

Halton MSA

Airflow measurement unit for rectangular ducts
 


 

  • Measurement based on differential pressure in measurement probe created by airflow
  • Very accurate measurement
  • Measurement probes can be removed for cleaning
  • Galvanised steel design
  • Classification of casing leakage EN 1751 class C.
  • Measurement inaccuracy less than 10%
  • Installation independent of airflow direction

Dimensions

Dimensions


Halton MSA


 

 W  H
100, 200, ...1600 100, 200, ...1000

Material

Material


Halton MSA

 Part  Material
 Casing  Galvanised steel
 Measurement probe pipes  Aluminium
 Measurement tubes  PVC and PP plastic

Function

Function


Halton MSA 



Air flows through the measurement unit, which is installed tightly into the ductwork.
Airflow in a duct creates a pressure difference between the front and rear probes. The corresponding airflow rate can be defined by measuring the pressure difference sensed by the averaging probes.
 

Installation

Installation


Halton MSA

Respect the safety distances between the measurement unit and flow disturbances (e.g. bends (2), T-branches (1)) presented in figure below in order to ensure the accuracy of the flow measurement. Installation is independent of airflow direction.

The hydraulic diameter is calculated using the formula below:
d h = 2x WxH / (W+H)


 

Measurement

Measurement


Halton MSA

Connect the measurement tubes to the measurement taps and to a manometer.
Read the pressure difference between the probes.
The airflow rate is calculated using the formula below or by reading the airflow rate directly from the diagram described in the performance section.



 

qv                     Calculated airflow rate, l/s
k                       k-factor  (see formula below)
Δpm                  Measured differential pressure, Pa
 

Formula for k-factor calculation:

k = W (mm) x H (mm) x 0,001054

    Unit width (mm)
H      Unit height (mm)
 

Specification

Specification

 

The casing of the measurement unit shall be made of galvanised steel.
The measurement probe pipes shall be made of aluminium.
   
Measurement shall be based on the principle of dynamic pressure difference created by airflow.
Inaccuracy of the measurement method shall be less than 10 % of the reading.
 

Product Code

Product code


MSA-W-H


W = Width
       100, +50, .., 1600

H = Height
       100, +50, .., 1000


Other options and accessories

MA = Material 
         CS       Steel

ZT = Tailored product 
         N          No 
 

Code example

         MSA-400-200, MA=CS, ZT=N
 

Downloads & Media

Halton MSA - nl
Type
Datasheet
Language
neerlandés (Países Bajos)
Size
408.5 kB
Halton MSA - fr
Type
Datasheet
Language
francés (Francia)
Size
933.2 kB
Halton MSA - uk
Type
Datasheet
Language
inglés (Reino Unido)
Size
407.3 kB
Halton MSA - fi
Type
Datasheet
Language
finés (Finlandia)
Size
406.2 kB
Halton MSA - se
Type
Datasheet
Language
sueco (Suecia)
Size
408.7 kB