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WG200-LP - LPG & Petrol Vapour Alarm for Boats


WG200-LP - 2 Sensor LPG & Petrol Vapour Alarm System 330.00 inc VAT


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A Complete Range of Alarms

Nereus Alarms offer a range of alarm systems for detecting LPG and petrol vapour. Designed specifically for use on boats and RIBs, these systems use modern electronics and design techniques to provide unrivalled protection.

The Need for an LPG Alarm

A leak of LPG (LP Gas) can result from any number of situations such as split or perished flexible hoses, chaffing pipes, leaking joints, poorly installed appliances, cracked cylinder lockers, loose cylinder regulators or unlit burners. Being heavier than air, LPG will sink and collect in the bilge or any available compartment. A naked flame, electrical spark or hot exhaust is all that is required to cause an explosion.

The Need for a Petrol Vapour Alarm

Petrol vapour is often used as a fuel for inboard and outboard engines of boats, tenders and RIBs. Petrol is very volatile and easily ignited. A small leak of petrol can therefore quickly lead to a very dangerous situation. If the petrol vapour is allowed to build up in a confined space and ignition occurs an explosion will result.

The Usual Problem - Water Damaged Sensors

Traditional LPG and petrol vapour sensors mounted in any wet area are prone to water damage. Once wet, these sensors are permanently damaged and often give a continuous false alarm. Not knowing whether the alarm is due to a gas/petrol leak or damaged sensor, the crew are left unsure how to act. Apart from the inconvenience, this results in an expensive repair and a period without protection.

The Solution - Unique Waterproof Sensor

Waterproof Gas SensorTo overcome this problem, Nereus Alarms has developed a unique waterproof sensor which is used in their WG range of alarm systems. These remarkable sensors will survive both splashing water and total immersion and are the only ones of their type on the market.

Whether you use your boat for business or pleasure, you will benefit from reliable protection without the trouble or dangers of water damaged sensors.

Other Features

The alarm systems are small, neat and stylish. They are easy to install (either flush or surface mounted), simple to use and require no maintenance. Lights on the control panel indicate power, fault (eg damaged wire to sensor) and alarm conditions. All models have an internal alarm buzzer, an output to drive additional remote sirens and a separate alarm relay output.

Fast Response & Low Power

The latest technology sensors combine fast response and high performance with very low power consumption. 


Model WG200-LP

LPG (butane/propane) & Petrol Vapour sensors

LPG alarm sensitivity

~10% LEL (lower explosive limit)

Petrol vapour alarm sensitivity

~10% LEL (lower explosive limit)

Operating voltage

12/24V (10 to 32 Vdc)

Current consumption

120mA (normal operation), 180mA (alarm)

Temperature range

-20C to +40C

Auxiliary buzzer output

300mA at supply voltage

Alarm relay output

SPCO, 1A contact rating

Control panel size

96x60x26mm (surface mounted), 96x60x5mm (flush mounted)

Sensor size

35x35x26mm (surface mounted), 35x35x5mm (flush mounted)

Downloads (pdf) & Links

pdf logo Download this page >>>


pdf logo User Manual WG200-LP >>>


pdf logo Installation Instructions >>>


pdf logo Stickers >>>


pdf logo Wiring Diagram >>>


 LPG Information >>>


 PV Information >>>


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Nereus Alarms Ltd
9 Britannia Road, Poole, Dorset. BH14 8AZ  UK
Tel: +44 (0)1202 731886   Fax:+44 (0)1202 739060