gas specific sensors?
tperkins
Posts: 98
Does anyone know of sensors which detect the proportion of these gasses--hydrogen, methane, carbon monoxide, carbon dioxide, and oxygen--in a gas stream which would ideally be sampled at two points, before and after cooling, at 700 to 900 degC, and then at 20 to 30 degC.
The sensors Parallax sells seem not to be gas specific.
The goal is to measure the energy content and constituent gas proportions of producer gas, with an eye to characterizing optimal operating conditions at and while transitioning between steady state minimum and maximum load levels. The least sophisticated way to do to it ids meter known quantitties of producer gas and air into a combustion zone and see which control inputs give the highest temperature. That satisfies the primary goal, but the secondary goal of maximizing the proportion of hydrogen and methane in place of CO is not met that way.
If anyone has used the Parallax gas sensors to detect the relative concentrations of mixed fuel gasses, I'd love to hear about it.
I've been to Mouser, Digikey, Jameco, Allied, McMaster-Carr, Electronics Goldmine, and All Electronics. And of course I've read the datasheets for Parallax's offerings.
Ultimate goal is within about five years time to build the wood gasifier, genset, inverter, and wood handling equipment (depending on usage and efficiency, I'll need to make 10 to 45 cords per year into 1-2" cubes--automating that is required).
The sensors Parallax sells seem not to be gas specific.
The goal is to measure the energy content and constituent gas proportions of producer gas, with an eye to characterizing optimal operating conditions at and while transitioning between steady state minimum and maximum load levels. The least sophisticated way to do to it ids meter known quantitties of producer gas and air into a combustion zone and see which control inputs give the highest temperature. That satisfies the primary goal, but the secondary goal of maximizing the proportion of hydrogen and methane in place of CO is not met that way.
If anyone has used the Parallax gas sensors to detect the relative concentrations of mixed fuel gasses, I'd love to hear about it.
I've been to Mouser, Digikey, Jameco, Allied, McMaster-Carr, Electronics Goldmine, and All Electronics. And of course I've read the datasheets for Parallax's offerings.
Ultimate goal is within about five years time to build the wood gasifier, genset, inverter, and wood handling equipment (depending on usage and efficiency, I'll need to make 10 to 45 cords per year into 1-2" cubes--automating that is required).
Comments
go to the link, and it specifically mentions sensors for Hydrogen, methane
http://www.figarosensor.com/gaslist.html
you can even mail the usa office of figaro for help.
Mike
Many of the Figaro sensors are quite specific. It may be a group of linear equations for a set of them can distinguish individual gas proportions.
Thank you again.