LV remote switching of 230v

[opps]

Sorry if this is the wrong place to ask.

I want to be able to turn my 230v HVLP Spray turbine off from a switch on, or very near to, the gun.

I have 10m of hose from the turbine to the gun and try to keep the turbine in a different room to reduce the overspray that is sucked in. At the moment I use two extension leads, one plugged into the turbine, the other end of which is near me and plugged into another extension lead which runs back to the socket near the turbine.

I would rather just have some kind of small unobtrusive switch attached to the hose, near the gun's handle, preferably running low voltage (and non sparking, IP rated etc). I had assumed that I would need a relay but after reading elsewhere I am no longer sure.

Suggestions would be greatly appreciated. Thanks

 

[EFLImpudence]

There are various remote RF controls around today.

240V is low voltage.
<50V is extra-low voltage.

 

[OwainDIYer]

you can get air operated switches which just connect with tube, eg
http://uk.rs-online.com/web/p/air-switches/4729979/

 

[opps]

There are various remote RF controls around today.

240V is low voltage.
<50V is extra-low voltage.

Thanks for the RF suggestion. I see that Maplins do an RF controlled mains plug for £5.99 so I will probably go for that and see if it really does work thorugh a wall (in my case rendered thermalite).

Additionally, thanks for correcting me re low voltage

 

[opps]

you can get air operated switches which just connect with tube, eg
http://uk.rs-online.com/web/p/air-switches/4729979/[/QUOTE]

Thanks Owain, something else that i hadn't thought of. I will try the RF option first and if that doesn't work i will look at the air option.

TBH if the RF works it will be cheapest bar far.

 

[bernardgreen]

Since there is a hose between the gun and the turbine there is no reason why there cannot be an electrical lead attached to the hose.
A ELV source, a contactor and a switch in suitable housings. If the hose can be disconnected from the turbine then have a simple plug and socket connection the the switch lead as well.


This would be more expensive than a cheap wireless controlled socket but the reliability of a low cost wireless controlled socket would ( in my opinion ) be in-adequate. Too many other uses use that radio channel.

 

[opps]

Since there is a hose between the gun and the turbine there is no reason why there cannot be an electrical lead attached to the hose.
A ELV source, a contactor and a switch in suitable housings. If the hose can be disconnected from the turbine then have a simple plug and socket connection the the switch lead as well.


This would be more expensive than a cheap wireless controlled socket but the reliability of a low cost wireless controlled socket would ( in my opinion ) be in-adequate. Too many other uses use that radio channel.

Hi bernard,

I believe that the plug I have seen uses the 433.92MHz frequency. I think that I will be sufficiently far enough away from possible interference. If not I will definitely be posting back for more detailed advice

Thanks

 

[bernardgreen]

I believe that the plug I have seen uses the 433.92MHz frequency.

As used by wireless burglar alarms. baby monitors and many other types of equipment.

It is unlikely that signals from another source will turn the socket on and off as socket and controller should have matching and unique identities.

But signals from another source may block the signal from reaching the socket so the controller is unable to turn the socket on or off. Not being able to turn on is ( in your application ) not a hazard but any delay in turning it off may be a hazard.

The other source if compliant with the regulation for that channel ( licence exempt short range devices ) will not be a permanent block as there is a requirement that no transmitter transmits for more than 10% of time. ( the length of time is not clearly apecified and it could be 10 minutes out every 100 )

The problems are from non compliant equipment, such as some baby monitors which transmit continuously while the baby is crying.

 

[opps]

Just to update.

I went for the £4.99 maplins RF plug. Works great. I think that i am sufficiently far enough away from interference