[Gasification] mycoremediation of tarry water

[Pete & Sheri]

<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)
"
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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.
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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.

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$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
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