The 1-channel level control MS91-12-R monitors and regulates conductive liquid levels
(II). As a dual level regulator, it can be used
to control pumps and solenoid valves (I). As
monitoring device it is designed for run-dry or
over flow protection.
The sensitivity (liquid resistance) is adjustable
between 0.1 … 100 kò. One of the four sensitivity ranges is selected by the terminal configuration. Fine adjustment of the switch point
within the selected range is achieved with a
front cover potentiometer. The level controller
not only provides optimum reliability in differentiating liquids, it is also suited for the distinction between foam and liquid .
The adjustable switch-on and switch-off delay
is very important for turbulent liquid levels. A
delay time between 0.1 … 15 s can be set via
the potentiometer on the front.

Two parallely operating relay outputs with one
changover contact each are provided to output the switching commands. The output configuration of both outputs can be changed
from NC mode (no bridge between terminal
15/16) to NO mode (with bridge between terminals 15/16).
The switching status is indicated by a yellow
LED.
The switching status of the output is indicated
by a yellow LED and operational readiness by
a green LED.

■ Output: 2 relays with changeover contact
■ Responsivity: 0.2…100 kò
■ Removable terminal blocks
■ Switching of electrodes via auxiliary relay
■ Switch-on/off delay adjustable 0.1…15 s
■ Reliable distinction between foam and liquid
■ Galvanic isolation of input circuits, output
circuits and power supply