Hi Guys;
        This is the same unit that I currently use for coolant flow measurement. However I made my own lightweight aluminum "T" fitting. The sensor itself is made from lightweight plastic.

         It is actually old technology and we just happened to have an old one in stock at mill stores although they are not used here any longer, so I figured it was my duty to put it to good use:-). I just looked on the computer as the re-order pricing is still active and the sensor without the "T" is listed as $543.

It is made by GF Signet. Model #515
        I just went to www.gfsignet.com and while there is no price available, there is the product spec sheet in Adobe. Under the "fittings" link there is another Adobe page with a large selection of available "T" fittings and other options, many of which are better for our application than the heavy "T" shown on the other link. The "T" that I made works great but was a little bit of work to get it right.

        The output is a frequency output which I currently read from my Fluke multimeter sitting on the seat beside me. I had began to build a display using a LM2917 frequency to voltage converter. I converted the voltage into a 4-20mA signal and was driving a small 4-20mA LCD display salvaged from an old instrument and had it showing 0-100% coolant flow. The output wasn't stable enough so I was attempting to use a capacitor and an op-amp to filter it, when my electronic incompetence caused me to blow the chip, but I still had one more, so I blew that one too :-(. I haven't done anything further with this since, but next time I put in a Digi-key order, I'll order a sleeve of 25. Once I figure this out I'd like to set it up with a o-1volt output and input it to an unused input on the EM2, for a 0-100% reading with a low alarm point.

       
       

S. Todd Bartrim
Turbo 13B
RX-9endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm

        "Imagination is more important than knowledge"
                                        -Albert Einstein