Hi guys,

What's the difference between a standard relay and those mercury wetted relays? Can anyone assist? I'm building a circuit which require the mercury wetted relays, but i'm having trouble obtaining it. Anyone can assist on this?

Thks
Landon

 

Hello,

Electronic parts with mercury will become less and less.
Mercury is not allowed any more, due to the bad influence on the envirement.
The only place you will find them is in surplus stores.
Here is a link for an example:
http://www.surplussales.com/Relays/mercury.html

Greetings,
Bertus

 

The mercury was there to keep the contacts from wearing out during normal operation. You will not find mercury wetted relays because of environmental concerns, as Bertus said.

Get a relay that can handle the voltage and current, and is in a similar package.

 

I'm building a circuit which require the mercury wetted relays, but i'm having trouble obtaining it. Anyone can assist on this?

I would have to disagree with comments by others to just use a common relay or a reed as replacement.

If the original designer choose to use a mercury wetted contact then you can "simply" replace it with a contact that doesn't bounce and one that have consistent and stable contact resistance between operations.

Unfortunately, the only type of contact that does not bounce is, as you should have already guessed by now, the mercury wetted contact.

 

Hello,

What is the application?
Why do you need the mercury wetted contacts?
Is a solid state relays possible?

Greetings,
Bertus

 

There is also http://en.wikipedia.org/wiki/Wetting_current which is low for a hg relay

 

Hi guys

Thks for all the replies. Appreciate it. I'm building a circuit to simulate a spike.
The selection for mercury is due to it does not bounce. Unfortunately, it seems rare. I'm trying to look for alternative and substitutes to it but i'm having some difficulties.

Attached below is the circuit. on the extreme right is the mercury wetted relay.

 

Hello,

There is a solid state relays that might interest you.
Mouser has it : http://nl.mouser.com/Search/ProductDetail.aspx?qs=sGAEpiMZZMuE7ju2P/eWHcFgmmnn36q0OqZ9dNgc2I0=
Here is also the PDF.

Greetings,
Bertus

 

Hi Bertus, it's 730 in the morning and you replied me! Wow. Thks alot. I think your suggestion might work. I'll try it out. Thank you so much. Love this forum.