# Pros/cons of carbon nanotube (CNT) chemical sensors and conventional gas detectors?

1. Oct 19, 2006

### leoflc

I'm wondering what are the pros and cons of the CNT sensors and conventional gas detectors?
I know that CNT sensors can detect very low chemical adsorption energy, which a conventional gas detector probably can't.

Besides that, is there any more pros and cons of the two?

Thanks!

2. Oct 19, 2006

### NoTime

Big problem with CNT so far, is producing a consistant product in any meaningful quantity.
CNT production is still very much a black art.

3. Oct 19, 2006

### leoflc

I guess CNT is probably still pretty expensive, but I have no idea how much is the conventional gas detector usually cost. (since I've only seen it on tv..)

Thanks.

4. Oct 19, 2006

### NoTime

AFAIK you can't buy the CNT variety.
It's one of a kind, proof of concept stuff.

How much a conventional detector costs depends on what you're detecting and the sensitivity.
You can get something like a CO detector in the $20 to$30 range.