Siemens SITRANS L Series - Product Features; Product Applications; Principle of Operation

Description
2.4 Product features
SITRANS LVS100/200
Operating Instructions, 01/2019, A5E44839609-AA
7
2.4
Product features
● High resistance to mechanical forces
● Strong vibration resistance to high bulk material loads
● Rotatable enclosure
● LVS100: R 1½" (BSPT); 1¼" NPT (Taper) threaded connection
● LVS200: Stainless steel 1½” NPT or R 1½” (BSPT) threaded connection, or R 2" (BSPT)
or NPT sliding sleeve. DN 100 and 2, 3, 4" ASME flange and Triclamp 2" options
available.
● Suitable for high or low density material
LVS100 standard version 30 g/l (1.9 lb/ft
3
) min.
LVS200 standard version
20 g/l (1.2 lb/ft
3
) min.
LVS200 standard version with low density fork 5 g/l (0.3 lb/ft
3
) min.
LVS200 liquid/solid interface version
50 g/l (3.0 lb/ft
3
) min.
2.5
Product applications
● Dry lime, Styrofoam, flour, plastic granules
● High or low density, dry bulk materials
● Interface detection of a solid within a liquid (filter beds)
● Flow or no flow detection in pipe using liquid/solid LVS200 version
2.6
Principle of operation
A signal from the electronic circuit excites a crystal in the probe, causing the fork to vibrate. If
the fork is covered by material, the change in vibration is detected by electronic circuitry
which causes the relay to change state after a one second delay. When the material no
longer reaches the tines, full vibration resumes and the relay reverts to its normal state.
WARNING
Do not use as a safety device
This product is designed as a Pressure Accessory per Directive 2014/68/EU and is not
intended for use as a safety device.