Aquametrix LL Series Liquid Level Controllers - Manual

www.Aquametrix.com 978-749-9949 Toll free - 855-747-7623 (855-pHProbe)
Features
•
Ideal for applications where
the controller is mounted
remotely, up to 300’ from the
electrodes
•
Built-in sensitivity adjustment
for foam or liquid applications
•
Safe Low voltage at the elec-
trodes
•
Custom electrode length and
material available
•
Model LL7H for use with low
conductivity liquids
Description
100 School Street
Andover, MA 01810
978-749-9949
855-747-7623
www.WaterAnalytics.net
Applications
•
Waste water flow accumu-
lation
•
Water Treatment systems
•
Irrigation
•
Chemical Mixing
•
Process cooling systems
•
Neutralizaton Systems
•
Process flow control
• Filtration systems
LL3, LL4, LL7 and LL7H
Liquid Level Controllers
Water Analytics manufactures four
models of liquid level controllers to sat-
isfy most industrial applications. These
controllers operate on the principle of
electrolytic conductivity in liquids. A
built-in sensitivity adjustment permits
field tuning the instrument so that one
model is suitable for most conductivity
liquids. For instance the LL4 or LL7 may
be adjusted to respond to either foam or
liquid. Some controllers may be as far
as 300 meters from the electrodes, and
connections are made with unshielded
cable.
The AquaMetrix design limits the volt-
age at the electrodes to 18 volts, and
also limits the current even if electrodes
are shorted. Some competitive control-
lers may require as much as 500 volts
across the electrodes.
MODEL LL4
This model has one relay for a pump
with normally open or normally closed
operation.
MODEL LL7 and LL7H
These units have the added feature
of an auxiliary pair of normally open
contacts for use with an annunciator or
other device. The LL7 version is suit-
able for most industrial applications.
The LL7H has much greater sensitivity
and is specifically designed for use with
low conductivity liquids.
MODEL LL3
This model is the most versatile of the
four LL Series controllers. It contains
two relays, for pump and auxillary
use, each with normal open or normal
closed operation. An indicator LED light
in the unit can be used for very accu-
rate sensitivity adjustments.
All LL Series controllers are suitable
for single level service or differential
service. Single level service allows
for high or low alarm, while differential
service provides a pump up/pump down
region between two electrode heights.
All units are housed in a NEMA 1 black
ABS plastic enclosure which plugs in
to a standard 12-pin relay socket with
durable screw terminals. The pins and
terminals are nickel plated brass.
by
Water Analytics
AquaMetrix
by
Water Analytics
AquaMetrix