Operating Instructions FLOWSIC100
Gas Velocity Monitor
Product Description
8012513/03-2008 © SICK MAIHAK GmbH · Germany · All rights reserved 25
2.3.1.2 Internally Cooled Sender/Receiver Units
Through internal cooling of the ultrasonic transducers, the types FLSE100-MAC, HAC and
PRAC can be used for gas temperatures of max. 450
°C (MAC, HAC) respectively max.
350
°C (PRAC). The cooling air (for type MAC and HAC) is supplied by a control unit with in-
tegrated filter and fan (see Section 2.3.3). For type PRAC the cooling air is supplied by an
electronics unit with integrated memprane pump.
The advantages over the purged versions are:
• Lower costs of installation and operation,
• no flow of purge-air into the measured medium, therefore no direct influence on gas flow
and flow rate,
• lower risc of passing below the dew point at probe head.
Note: Using the FLOWSIC100 in gases with dust concentrations > 1 g/m³, the sender/receiver
units have to be installed in an angle to the flow direction of 60° (only applicable for
FLSE100-HAC). The downstream sender/receiver unit (slave in Fig. 2.4) has to be equipped
with a rebound protector .
The following differences exist in addition to the possible versions:
Fig. 2.11: FLSE100-HAC
Type FLSE100 Transducer und Duct Probe
MAC Nominal diameter 35 mm
HAC Nominal diameter 60 mm
PRAC Single-probe version (2 transducers)
Electronics unit Connection HAC Duct probe Transducer
NL
Cable connection
A
A
A-A
Type FLSE100-MAC can be
supplied with different
flanges on request (see
Section 2.7.1).
NL =350 mm, 550 mm
Shroud
Purge-air connection
Cooling air outlet
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