<snip> In response to: " ..right, we need black boxes to log everything we do. Ok, at least we get to keep our reputation on black art magic. ;o) " ------------------------------------------------------------------- I have been a big Arduino fan ever since I read about them at the allpowerlabs website (Thanks again, Jim). I built a really nice datalogger (4 pressures and 3 temperatures, datalogging, LCD readout, etc..) for myself and am currently expanding it a bunch to get ready for more warm weather testing. (These things can also think about what they have learned and can then do something about it, too). Since you guys have been talking about various gases, and, as above, mentioned that "we need black boxes to log everything", I just thought I'd show some of you just how inexpensively you can get into logging gases. Below you will see a number of gas sensors that are pretty easy on the pocketbook. Add them to a $22 Arduino Uno R3 with about $50 worth of other hardware and you are in business. ------------------------------------------------------ 7.95, USD Hydrogen Gas Sensor - MQ-8 SEN-10916 RoHS CompliantIn Eagle Library Description: This is a simple-to-use hydrogen gas sensor, suitable for sensing hydrogen concentrations in the air. The MQ-8 can detect hydrogen gas concentrations anywhere from 100-10000ppm.
This sensor has a high sensitivity and fast response time. The sensor's output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC. This sensor comes in a package similar to our MQ-3 alcohol sensor, and can be used with the breakout board below. ------------------------------------------ $53.95 MG811/MG-811 CO2/Carbon Dioxide Sensor Module for Arduino and other MCUs in Business & Industrial, Electrical & Test Equipment, Test Equipment | eBay. --------------------------------------------------------- $4.95 USD Methane CNG Gas Sensor - MQ-4 SEN-09404 RoHS CompliantIn Eagle Library Description: This is a simple-to-use compressed natural gas (CNG) sensor, suitable for sensing natural gas (composed of mostly Methane [CH4]) concentrations in the air. The MQ-4 can detect natural gas concentrations anywhere from 200 to 10000ppm. This sensor has a high sensitivity and fast response time. The sensor's output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC. This sensor comes in a package similar to our MQ-3 alcohol sensor, and can be used with the breakout board below. ----------------------------------------- $7.95 USD Carbon Monoxide Sensor - MQ-7 SEN-09403 RoHS Compliant Description: This is a simple-to-use Carbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO-gas concentrations anywhere from 20 to 2000ppm. This sensor has a high sensitivity and fast response time. The sensor's output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC. This sensor comes in a package similar to our MQ-3 alcohol sensor, and can be used with the breakout board below. ------------------------------------------------------- Pete Stanaitis -------------- _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
