The 1-channel level controller MK91-12-
R/230VAC monitors and regulates conductive
liquid levels.
As a dual level regulator, it can be used to
control pumps or solenoid valves, as monitoring device it is designed for run-dry or over
flow protection.
The level controller not only provides optimum reliability in differentiating liquids, it is
also suited for the distinction between foam
and liquid. The responsivity (liquid resistance)
is adjustable between 0.2 … 100 kò. First,
select one of the four sensitivities with the
"Range" switch. Then you can finetune the
switchpoint via the potentiometer at the front.
The separately adjustable switch-on and
switch-off delay is very important for turbulent liquid levels. You can set a delay time between 0 … 20 s via the potentiometers at the
front.

Two relay outputs each with one changeover
contact are available to output the switching
commands. You can toggle between closed
current (R) and working current (A) with the
"Range" switch.
The switching status of the output is indicated
by a yellow LED and operational readiness by
a green LED.
For further information, please order out installation guidelines.

■ Responsivity: 0.2…100 kò
■ Hysteresis: 10%
■ Output: 2 relays with 1 changeover contact
■ Electronic switching of electrodes
■ Switch-on/off delay 0…20 s, separately adjustable
■ Reliable distinction between foam and liquid
■ Galvanic isolation of input circuits, output
circuits and power supply