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Atmospheric Oil Mist Detection System
TM4 / AUGUST 2018
EMAIL qmi@oilmist.com WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL +44 (0)20 7328 3121
Sheet-8
DESCRIPTION OF Q10 ATMOSPHERIC SENSOR
See drawing Sheet-10
The Sensor operates using the principle of light scatter (nephelometry). The power
and signal are transmitted to and from the Monitor through a single cable sending a
timed analogue signal. All Sensors sample simultaneously and continuously every half-
second (500 milliseconds).
The assembled Sensor comprises:
(a) Articulated Joint and mounting flange
(b) Chamber
a) ARTICULATED JOINT AND MOUNTING FLANGE
See drawing Sheet-10
The Articulated Joint is fitted to bulkhead or deck allowing the Sensor to be positioned
facing the flow of air in the chamber being monitored.
The sub-assembly is fitted to the Articulated Joint by 4 screws, which can be removed
if and when the Sensor lens requires cleaning.
b) CHAMBER
Inside the unit are the PCB, integral fan, and sensing lenses. Power is supplied to the
12-volt fan by a single cable, which is connected to the
Monitor (or to a junction box). The fan draws the sample of air past the sensors
through the outlet ports.
In the front of the Sensor unit are the air intake louvers, and an LED, which shows
green when the fan is working. The electronics are mounted on the back of the
chamber casing and are protected by the cover sealed to IP 65.
At the back of the unit is the multi-purpose power and signal socket. Next to the
socket is the mounting spigot.
NOTE: The integral fan is interchangeable without recalibrating the Sensor.
It is a consumable item and does not come under warrantly. New Fans can be
purchased from your Agent.