tag:blogger.com,1999:blog-4890735084148552399.post612987795384087581..comments2023-03-09T20:34:26.884-08:00Comments on Techn'xt: Special! Datalog report for the new sensor from Dexter Ind. : dPressureAnonymoushttp://www.blogger.com/profile/00819757535241582903noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-4890735084148552399.post-60779772578334301892010-05-11T16:13:22.000-07:002010-05-11T16:13:22.000-07:00cool sensorcool sensorAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4890735084148552399.post-83343594148459678722010-05-11T21:35:18.000-07:002010-05-11T21:35:18.000-07:00Nice write up. There are some things it would be i...Nice write up. There are some things it would be interesting to learn a little bit more about as well. For instance, you say the sensor can measure "negative pressure"... by that, I assume you mean negative *gauge* pressure (pressure lower than ambient). It would seem this is rather sharply limited to a pressure about 1.8 psi below ambient however. Making some assumptions from your graphs, I'm guessing the sensor makes out ("off scale high") around 35 psi, or a shade over 2 Atm - is this the case?<br><br>It's also unclear to me what you mean by "datalog program": does the DI block function within the NXT-G Edu datalogging environment, or did you write your own small program to log sensor values to a standard text file? If they second, what are the units on the horizontal axis? Seconds? Something else?<br><br>I'm also guessing that each of those runs above was from a *different* experiment, correct?<br><br>As to your ideas, there are some others you could use. For instance, measuring depth below the water surface (as the depth increase, so does the pressure, in a very reliable way, the rate of air loss from a working pneumatic system, detecting automobile traffic (yep, there's a way), measuring how someone tosses and turns at night (hook it up to an air mattress, and log the pressure), etc. In fact the one use I've never quite understood for sensors like this to "stop a compressor", as there are very reliable, completely mechanical methods of doing this (LEGO polarity switch activated by a small pneumatic cylinder opposed by a rubber band), but it will certainly work that way (why choose the mechanical solution? See my recent blog post on the subject at theNXTstep blog, and realize that the mechanical version frees up one input and one output port that you'd otherwise need).<br><br>It does look like a nice, useful sensor - thanks for writing it up!Brian Davisnoreply@blogger.comtag:blogger.com,1999:blog-4890735084148552399.post-60068756702525570782010-05-11T23:00:02.000-07:002010-05-11T23:00:02.000-07:00Thanks Brian! I have added changes to it.jojoguy1...Thanks Brian! I have added changes to it.<br>jojoguy10Jojoguy10noreply@blogger.com