OTT SE 200, Operating Instructions Manual

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3 Introduction
The float-operated OTT SE 200 Shaft Encoder provides continuous water level
measurement of groundwater and surface waters.
Changes in water level are transferred via a float-cable counterweight system to
the float pulley of the SE 200. The rotation caused by this action is converted to
an electrical signal that is available at the connecting line.
The SE 200 is available with a 4 … 20 mA interface or with a combined 4 …
20 mA/SDI-12 interface and is intended for use for connection to an external
datalogger, a programmable logic controller (PLC), or to displays, for example.
Included in the scope of delivery is a set of installation accessories that enables
one to install the unit as a stand-alone device or in combination with any OTT
level recorder or that of a competitor. It is possible to install this unit in 4" to 6"
observation wells as well using an observation well installation set (accessory).
A special design of the SE 200 is available with a float pulley for a bead chain
instead of a float cable. This design operates without slippage even when the
water level changes rapidly.
SDI-12 and/or
4 … 20 mA interface
SE 200
Connecting line
Float
cable
Float
Counterweight
Float
pulley
Fig. 1: Setup of a level measurement
station using the OTT Shaft
Encoder SE 200.
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