Mosquito´s

OldBawley

OldBawley

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Mosquito’s.

Until two years back, Raid had a battery driven device that used Transfluhtrin as the repellent.
One filling lasted a month, and Transfluhtrin is one of the less poisones repellents.
I had the thing running of a 12 to 1,5 Volt supply, the ventilator was hanging in our fore-peak where we sleep. Never a bite, no stench, fantastic.
Raid stopt selling, Why?
Anyway, they have a new one, working with Transfluthrin, 30 days on one filling, but this time it is 220 V and uses a heating device. ( Raid Night and day )
Running that over a inverter even a small one is overkill. Like running a diesel to heat water.

Is there a way I could make a 12 V heating thingy for that little apparatus?
 
What, not one lekky who knows how to make a heating coil?
Long time ago, sailing north of 52°, in despair, i tied one of those anti mosquito cicklets onto the glass of an oil lamp with some copper wire.
It worked fine but now i think it was a little bit overdue. Too much heat so to much poison and the lamp burning all night, bit stinky.

Come on guys, a hole in the market.
 
If you look closely you might find the wattage at 240V.I would expect 10Watts or less which is not a huge drain on your 12V system (less than 1amp).
 
I have obtained one of the new vaporising by heat type of anti mosquito gizmo’s.
Some thoughts :
In the old type, air was driven trough a paper “ filter “ by a very small ventilator. The paper filter contained the Transfluthrin. After 30 days ( 30 X 8 hours ) the mossys came back.
Transfluthrin is a repellent, I never found a dead mosquito. I suspect that by the airflow repellent molecules are set in the air. The mossys hate it, there stinger goes totally rubbery and they try to escape from the boat.
I have a bottle of liquid transfluthrin and impregnated one of the old filters with the liquid, for some reason, my trick did not seem to work. ????. The filters ( Replacements) are sold for 5 €/ piece, the production cost must be less than 0,001 €.
In the new version, a 220 V heating device heats a porous ceramic filter-plate. The liquid Transfluthrin vaporises and curls the mossystinger. No bite. The gadget uses 5 Watt.
To anyone living on a constant supply of cheap electricity that is peanuts. Although, three of those toys, never unplugd because the are so small, must cost more than one thinks.
Our boat has not been on shore power for the last 12 year. The size of a 85 Watt solar panel is huge, so 5 watt is quite some energy. If one had to obtain 5 Watt by hand, that would be some job.
Now, using a converter to go from 12 to 220 Volts for the magic machine would be foolish. Even the smallest converter gets so hot one can fray eggs on it. So the little porous ceramic plate has to be heated by 12 Volt DC.
Me, not being able to calculate or make a 12 Volt heating coil has to think of something else.
A 5 Watt light bulb gets very hot, but some of the energy is transferred into light. So the heat is less than the original thingy.
Still, one could use a bulb, some heat transferring paste and a bit of homework to do a test.
Next problem. In this part of Greece finding that paste is like looking for a finished marina.
Someone now how to make that stuff ? The paste I mean.
 
Bored of lying in the shade and reading a book, I forced myself doing something so I opened up the 220 V heating device.
It is complete Chinese to me, have no idea how it works. The 220 V AC tension is transferred to a magic disc, made of different materials. That there is no short wonders me. Maybe it is some “ Pelletier” heating thingy. Furthermore one led and one Black electronic ???? which is marked :


AUPO
A8-1A-F
150°C jet
X4

That could be some sort of security to switch of the tension or to regulate.

It will be of no use to me, I need a 12 V DC heating device. Still, being very curious, could someone explain to me how the 220 V heating works?
See pic.
 
OldBawley said:
Bored of lying in the shade and reading a book, I forced myself doing something so I opened up the 220 V heating device.
It is complete Chinese to me, have no idea how it works. The 220 V AC tension is transferred to a magic disc, made of different materials. That there is no short wonders me. Maybe it is some “ Pelletier” heating thingy. Furthermore one led and one Black electronic ???? which is marked :


AUPO
A8-1A-F
150°C jet
X4

That could be some sort of security to switch of the tension or to regulate.

It will be of no use to me, I need a 12 V DC heating device. Still, being very curious, could someone explain to me how the 220 V heating works?
See pic.
Click to expand...

That is a thermal fuse rated at 150°C, so if the thing overheats, the fuse will blow.


I suspect the disc is some sort of thermistor, self regulating to a certain temperature, there may be something available that would do the same at 12V, but, a lot of experimentation needed to find out.
 
Thanks, Starfire, have done some Googling, yes, it must be a PTC heater.

Now, me being from the cork and string technology century have read that these things exist for 12 Volts DC.

I have no desire to become filthy disgusting rich, so here are some thoughts;
There are much more places without electricity than with, witch have masses of mosquito´s.
There must be an enormous market for a little 12 V thingy which uses the same fillings as the 220 V absolutely no poison and absolutely no bites device of a huge enterprise like Johnson.

In the mean time I will be experimenting with a 2 Watt bulb ( more my cup of tea )

By the way, In Mazema bay, Poros there are no mosquito’s. No land cultivation, no sweet water.
 
Thanks gk29, I was totally forgotten about these.
The thing is, I want absolutely use the Transfluthrin. We live and sleep in a small volume boat so IF
some chemical has to be used, then the least harmful.
Furthermore, only one filling for one month, no hassle.
The “ Bengal “ heating device at 5 watt could however be interesting to transform. I just have to construct some holder for the Johnson Night and day refill.
 
Did see the thread, waiting for someone to confirm it is working. Have doubts, if it was so simple, mosquito´s would have never be such a problem. CO2 ok, temp ?????
Have one refill for the fan driven gizmo left, will last for one month. So in three weeks I have to start working on the heat dispersion system. If not , will be in celibacy soon.
 
OldBawley said:
Thanks gk29, I was totally forgotten about these.
The thing is, I want absolutely use the Transfluthrin. We live and sleep in a small volume boat so IF
some chemical has to be used, then the least harmful.
Furthermore, only one filling for one month, no hassle.
The “ Bengal “ heating device at 5 watt could however be interesting to transform. I just have to construct some holder for the Johnson Night and day refill.
Click to expand...

Old Bawley, sorry came the this thread rather late but might the item about two thirds down be what you are after? http://www.pesthelp.co.uk/weshop/Mosquitos.asp
 
Thanks Sanderling. Yes, this is very close to the “ Raid “ fan battery operated thingy we used for years. It uses Transfluthrin, so ideal. We have been in the Camarge, they have mosquito´s there, so big and blood thirsty as a Pterosaurs. We heard them scream outside, not one inside the boat.
One prob, I am not sure they still sell it, ( mostly 2008 ) and we are in Greece so difficult to get over here.
Have the impression they have the transfluthrin inside “Granules” and blow a weak air stream over – through it to release the repellent in the air. If that works so good ( 480 hours ) I am going to do a new test with impregnating old raid fillingwabs with fluid transfluthrin. Had one go with it and it did not work, maybe the paper filter was still to wet from impregnating.
 
I have 2 had of the mains anti-mosquito units for a couple of years, this summer I bought refills only to find that the design had changed and the bottle would not fit in the heating unit, transferring the liquid to the old bottle didnt seem to work for some reason. I subsequenly found ( in the chinese shop in Amerimar) a tin of "anti-mosquito" which just needed the lid removed, it was 100 sucessful for 5 weeks and had no smell. I dont know what the chemical was but it kept the mossies away and zero current.
We were also told by some locals of a plant which kept mossies away but I dont remember what it was called, anyone else come across it?
 
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