Hard to say, but Omega definitely care enough about their brand and reputation to have a good QA system and testing of products in place. Since testing that a CO monitor is working is very hard for a consumer, you rely a lot on trust in the brand.
If you can get a good, trusted brand for home CO monitors, I'd say go for it.
Apparently, Kidde is a trusted brand in fire alarms etc. in the US, so I think this one ($20) is probably equally trustworthy:
Anecdotal: I've bought cheap versions of things online enough times that I don't want to do it again (just got home from helping a friend install a battery that didn't even fit properly). I've had a few things melt and a couple explode..
I shudder to think that you would risk your life on a device of questionable quality.
>I shudder to think that you would risk your life on a device of questionable quality. //
The problem is surely knowing whether the expensive equivalent is just the same internals in a different retail pack (with other 'quality' signalling). That's genuinely hard for something that needs a lab to be tested.
