Instructions for Use – SCHMIDT
®
Flow Sensor SS 20.600 Page 7
3 Mounting instructions
General information on handling
The flow sensor SS 20.600 is a precision instrument with high measuring
sensitivity. In spite of the robust construction of the sensor head, soiling of
the inner sensor element can lead to distortion of measurement results
(see also chapter 8 Service information).
During procedures like transport, mounting or dismounting of the sensor
that facilitates soiling, it is generally necessary to attach the enclosed pro-
tective cap of SCHMIDT Technology to the sensor head and remove it
only during operation.
During processes with risk of soiling such as transport or mount-
ing, the protective cap should be placed on the sensor head.
Mounting method
The sensor SS 20.600 can be mounted only by means of a compression
fitting which supports the sensor tube and ensures positive clamping. The
compression fitting as well as a pressure protection kit is included in the
scope of delivery.
Due to the variety of applications the compression fitting exhibits different
versions which share the following features:
Pressure range: 40 bar (overpressure)
Media temperature: Min. -20 … +120 °C
Material: Screw fittings made of stainless steel 1.4571
Clamping ring made of VA steel
Variations are made on one hand by the design of the outer screw thread
(order option: G½ or R½) and on the other hand by materials and proper-
ties of the used O-seals:
Standard: NBR (operating parameters see above)
Oxygen (O
2
): FKM (BAM approval)
ATEX: FKM (suitable from -40 °C)
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