Liquified petroleum gas (LPG) is an invaluable source of energy on many sailing vessels. It should, however, be used with great care. In its gaseous form it is heavier than air and will always collect at the lowest level in a vessel. Any leak of gas, any spillage of liquid could sink to the bilge and, unable to escape, build up to explosive proportions.
The Nasa gas detector system warns if the level of LPG rises above 10% of the lowest explosive limit (LEL) giving adequate warning of the need to ventilate the area before a dangerous situation occurs. The system consists of a cabin mounted monitor and a remote sensor. The monitor gives visual and audible warning if gas levels at the sensor rise above 10% LEL and will warn of fault conditions such as damaged cables etc. There is also an auxiliary output to drive external devices. (The auxiliary output is available on pin 5 of the DIN socket of the alarm unit. Connect the auxiliary load between the positive supply and pin 5. Note the maximum sink current on pin 5 is 100mA. If the auxiliary load is greater then 100mA use the output to switch a relay)
The splash proof sensor is supplied with a 5 metre cable and has a test button to check the system right through to the gas sense element. The sense element is user replaceable in the event of contamination.
• Supply voltage 9 to 15 volts
• Low power consumption (typically 30mA)
• Fail safe system warns user of system faults
• Continuous performance monitor
• Spare low cost plug in catalytic sensor available
• External output to drive ancillary equipment
• Dimensions - W 134mm, H 70mm, D 28mm
• LEDs show system status continuously
• Two tone alarm activates when gas level reaches 10% of lower explosive limit
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