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Methanol vapour detector
16-05-2013, 08:05 PM
Post: #11
Methanol vapour detector
can we have an optional readout of ethanol units needed to counteract the methanol level we have been exposed to Cheers

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16-05-2013, 08:28 PM
Post: #12
Methanol vapour detector
The sensor has a heating element inside it so runs down batteries pretty quick. It also needs a 48 hout \'burn in\' time so would need a socket for 12v external power supply or similar. Would also need a usb programming slots unless the chip could be pre-programmed somehow? Never used anything else other than the Arduino Due so not sure about the options - would depend on price I suppose? The LCD is 2 line, 2 x 16 I think!

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16-05-2013, 08:34 PM
Post: #13
Methanol vapour detector
[rquote=420146&tid=37207&author=hifly]can we have an optional readout of ethanol units needed to counteract the methanol level we have been exposed to Cheers[/rquote] yes, but we might have to go to a 4 line display for that. PS. Any other name suggestions?

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16-05-2013, 08:35 PM
Post: #14
Methanol vapour detector
[rquote=420151&tid=37207&author=paddygoat]The sensor has a heating element inside it so runs down batteries pretty quick. It also needs a 48 hout \'burn in\' time so would need a socket for 12v external power supply or similar. Would also need a usb programming slots unless the chip could be pre-programmed somehow? Never used anything else other than the Arduino Due so not sure about the options - would depend on price I suppose? The LCD is 2 line, 2 x 16 I think![/rquote]

yes those sensors use a fair bit of current, what id do is use an external supply 9v maby, 5v regulator on the board.

and id use just a 328 chip 3 quid, and you can program it on a uno board then bolt it into your board.

arosa sdi.
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16-05-2013, 08:42 PM
Post: #15
Methanol vapour detector
Ideal! u2u sent.

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16-05-2013, 08:52 PM
Post: #16
Methanol vapour detector
rquote] Any other name su99estions?[/rquote]

Methanose????Big Grin
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17-05-2013, 01:07 AM
Post: #17
Methanol vapour detector
MethAlert

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17-05-2013, 02:43 PM
Post: #18
Methanol vapour detector
MethtoolateCool

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17-05-2013, 05:12 PM
Post: #19
Methanol vapour detector
Paddy

The circuit and components are neither intrinsically safe nor flameproof as far as i can see and by its very nature if it is trying to detect methanol then for safety it would need to be certain not to cause any form of ignition.

I assume, as you have mentioned the heater, that the MQ-3 is the type of sensor that detects flammable gas by igniting it on the element. If so then I can\'t see how this device can be safe. Especially if you are intending marketing the device or idea.

Th MQ-3 is probably the type of device used in breathalyser units where there is pretty much a zero chance of reaching the LEL. Home brew biodiesel sheds are a different risk completely.

Please be careful
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17-05-2013, 06:38 PM
Post: #20
Methanol vapour detector
what about putting the components behind a wire gauze, as used in miners lamps

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