
QMI Uniplex and Duoplex Monitors

The QMI Uniplex oil mist
monitoring instrument meets the needs of small engines and confined
atmospheric spaces with all the benefits of having the monitor located
in the control room. The unit monitors one sensor and includes all the
salient features of our Multiplex system.
The monitor has variable
settings in mg/l to suit all types of engines and locations. There are
two levels of alarm - an early warning and a main alarm. There is a
built-in engine slow/shutdown facility. The monitor incorporates a
complete fault finding self diagnostic facility. The design overcomes
the problems of false alarms where there may be a query about whether
it is a failure within an engine or a fault in the monitoring system.
The instrument consists
of a monitor and one detector - with the addition of a fan for engine
usage. An atmospheric application does not require a fan as it is
incorporated in the detector.
The QMI Multiplex oil
mist detection system has a proven record of
reliability. Several innovative changes to the design of the Uniplex
unit make it possible to offer a low cost solution where only one
detector is necessary. The unit can even use the existing pipework of
other oil mist detection systems - the type that mixes samples from
all crankspaces.
See attached layout
sketches below for installations.

Picture and technical
specification and dimensions. Both the Uniplex and Duoplex instruments
have all the salient features of the Multiplex unit. The Duoplex has
two detectors opposed to Uniplex that uses one - see various
configurations of layout below.
Uniplex / Duoplex Monitor Layouts

(Above) Schematic
Layout for Uniplex Monitor
Using an Engine Layout
Below, you can see some
different configurations of the engine room.

(Above) Schematic
Layout for Duoplex Monitor Using One Engine Detector and One
Atmospheric Detector

(above) Schematic
Layout for Uniplex Monitor Using an Atmospheric Detector
(above) Schematic
Layout for Duoplex Monitor Using Two Atmospheric Detectors
(above) Schematic
Layout for Duoplex Monitor Using Two Engine Detectors