<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Hey there, Floyd,<br>
<br>
This is Mac Hathaway, from Harvard Center for Nanoscale Systems. At
CNS, We use MST and Midas sensors (Honeywell), which both seem to work
pretty well. The MST has a sensor cartridge right at the monitoring
point, and the Midas can do remote sensing, i.e. the sensor can be some
distance from the monitored point, drawing a continuous gas sample via
poly or teflon tube, up to ~100 ft away depending on the gas.<br>
<br>
There is another group that is breaking in, some guys from Zellweger
(used to be MDA, old makers of Chemcassettes). They are called DOD
Technologies.<br>
<br>
Our sensor guys, EERC out of Rochester, NY are quite good, and would
happy to help you spec out your new sensors, or even help you put a new
system together. They helped us with our initial setup, and are
currently doing the bump tests several times a year.<br>
<br>
Mac Hathaway<br>
Harvard CNS<br>
<br>
<br>
<blockquote
cite="mid:8F95EA77ACBF904A861E580B44288EFD99B7D838B5@FASXCH02.fasmail.priv"
type="cite">
<div class="WordSection1">
<p class="MsoNormal"><o:p></o:p></p>
</div>
</blockquote>
</body>
</html>