[PSUBS-MAILIST] Depth Sounder

Thu Mar 25 21:33:28 EDT 2021

 It uses a different protocol which is a bit more complicated to implement with microprocessors, but certainly not impossible.
Jon

    On Thursday, March 25, 2021, 08:19:49 PM EDT, Steve McQueen via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

 NEMA 2000 is the latest protocol. Is there a reason you would not consider it?Steve
On Thu, Mar 25, 2021, 7:21 PM Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Jon on the R300, I use the Airmar DST800 DST800 Smart™ Sensor | AIRMAR I interface it with my PLC via RS232 and parse the NEMA 0183 ASCII strings to get altitude, speed and temperature.  I have been happy with this transponder for the most part.  What I don't like about it is the 70m depth limit.  On many occasions when doing a surface transit I have been in deeper water than this and the meter pegs out.  
I founds interfacing with NEMA 0183 devices straightforward.
The R800 I am designing has a design depth of 800 ft.  As such I need a deeper sounder.  Because I like the NEMA 0183 devices and the fact I am going to use a RS232 channel on the new boat for altitude, I have speced a new transponder. It is the CruzPro ATU120BT CruzPro ATU120BT: 300 Mt plastic feed-through transducer (marinepanservice.com)

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CruzPro ATU120BT: 300 Mt plastic feed-through transducer

CruzPro ATU120BT plastic active feed-through transducer, with temperature, depth 300 Mt, power 320 watt RMS, DSP...
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This gets me 300m or 984 ft so more than enough for new boat.  The cost for the unit is $260.  While these transponders are for surface boats, I am hoping that it is solid and can withstand the depth.  At some point I plan on doing some depth test in my test chamber to see if it will withstand the pressure.  I found some nice altitude sensors for ROVs but I found that the prices are a magnitude higher.
I think Hank has been happy with his altitude sounder.  I don't remember what he using but you might want to send him and note and see what he used on Gamma and the E3000.
Cliff

    On Thursday, March 25, 2021, 09:06:37 AM CDT, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

 Cliff, what manufacturer/model sounder are you using for altitude?  Do you have it interfaced with your computer or is it a separate unit?  I'm looking at NMEA sounders which are relatively easy to interface with microprocessors but are expensive.  Analog depth sounding transducers are much cheaper but I don't know how they present their information.
Jon_______________________________________________
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