3.3.3
Gas sampling unit
Overview
1
2
3
4
1
Filter housing
2
Gas sampling tube (unheated)
3
Weather hood
4
Pre-filter (optional)
Function
The gas extraction unit SFU extracts flue gas from the stack via the gas sampling tube.
After filtration, the flue gas is passed to a measuring device for analysis.
Characteristics
•
The gas sampling tube is unheated and without pre-filter
•
The gas sampling tube is available in different lengths (option)
•
The gas sampling unit is thermostatically controlled.
•
The analyzer regulates the heaters.
•
When no voltage is applied, the heated sample gas line and the analyzer are
purged with instrument air.
3.3.4
Sample gas line, heated
Overview
1
5
4
7
6
3
2
Figure 4: Heated sample gas line
1
Connection to gas sampling unit (without electrical connections)
2
Connection to measuring device (with electrical connections)
3
Protective cap
4
PT100 connections
PRODUCT DESCRIPTION
3
8021889/1D1T/V3-1/2021-09 | SICK
O P E R A T I N G I N S T R U C T I O N S | MCS200HW
17
Subject to change without notice