Description
2.4 Design
SITRANS SL
16 Operating Instructions, 12/2010, A5E01132948-04
2.4 Design
The SITRANS SL gas analyzer consists of a pair of cross-duct sensors - a transmitter unit
and a receiver unit - both with the same dimensions. The complete analyzer is integrated in
these two enclosures (pos. 1 and 7, fig. 2.2). The transmitter unit contains the laser source
which light is transmitted to the receiver through the measurement path. The receiver unit
contains a photodetector including electronics as well as a reference cell. The receiver unit is
connected to the transmitter unit by means of a sensor connection cable. The connection
cable of the receiver is used to connect the power supply and the communication interfaces.
The receiver enclosure contains a local user interface (LUI) with an LC display which can be
read through a window in the lid. The LUI is normally operated via a remote control panel.
2.4.1 Transmitter and receiver units
Special features of the transmitter and receiver units:
● Two in situ cross duct sensors, designed as transmitter and receiver units, connected via
sensor connection cable
● Process interface which
– consists of identical assemblies for transmitter and receiver
– is the interconnection between the transmitter/receiver units and the process
● Powder-coated aluminium; stainless steel
● Degree of protection IP65
● Adjustable flanges
● Suitable for a flange connection to DN50/PN10-40, ANSI 4"/150 lbs
● Purging facilities on the process and the sensor sides, configurable application with
purging gas connections
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