FL 128 Multizone System 15.01.2021 41
Oil Sensor
Introduction
The Floodline oil sensors can be used with a Floodline Control Panel to provide a dedicated oil leak alarm
system or as part a larger water leak detection system. The oil sensor is usually mounted vertically and
activates when oil (or any other liquid) touches the infra-red sensing dome at its base. Typical applications
include plant rooms where not only water leaks are possible but also oil and in bunded areas around generator
fuel tanks etc. Unlike other Floodline sensors the Oil Sensor is a powered device which limits the number which
can be used with a standard Floodline control panel. The oil sensor can be used alone or up to a maximum of
four can be used in parallel in any one zone with a maximum of 8 per panel.
The oil sensor is encapsulated and fitted with 5m of 4-core leader cable. It is normally used in conjunction with
a steel powder coated Floodline guard plate to give heavy-duty physical protection and assist fixing and
adjustment. Dimensions: 80mm high x 51mm wide x 27mm deep - when mounted in its guard plate -110mm
high x 102mm wide x 30mm deep.
Fixing
The oil sensor is mounted at the base of the wall, plinth or item of apparatus. Sensors are fixed to the guard
plate using 2 no 4x3/8” self-tapping screws fixed through the adjustment slots into the two holes pre-drilled in
the sensor. The guard plate should cup around the oil sensor. The whole assembly can then be fixed to the wall
etc with screws/bolts through the holes in the guard plate flanges.
Once the assembly is fixed at the desired height above the floor the sensor dome tip can be adjusted up or
down by loosening the fixing screws and sliding the unit up or down within the guard plate. The dome tip but a
small gap can be judged by placing a thin piece of card (a business card is good) on the floor and allowing the
dome to rest on it. The staggered fixing screws can then be tightened, and the card removed. This will give a
gap of around 0.5 to 1mm.
The area under the dome must be free form debris as if a small amount of moisture or oil builds up in
the debris it could cause unwanted activation of the sensor.
Connecting to the Floodline Base Unit
The oil sensor/s are connected to both the zone input terminals and aux. output terminals within the Floodline
multi-zone control panel via the encapsulated 4-core leader cable. The leader cable to the oil sensor can be
extended using any 4-core PVC/PVC 7/0.2mm alarms/comms type cable. LSF or other light cables can be
substituted if required. A zone can consist of a single oil sensor or up to 4 sensors can be connected in the same
zone (with sensitivity set at 200k).
A diagram of the connection details for the oil sensor is presented in Appendix H.
Up to a maximum of 8 sensors can be connected to one multi-zone panel. If more are required, then an
additional power supply will have to be supplied.
Standard colour coding is used for the 4-core leader cable encapsulated in the oil sensor and is shown in the
table below as well as on the diagram in Appendix H.
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