[SS2S-Main] Re: Tempilstick

  • From: Vicente Alvero Zambrano <vicente_alvero_14@xxxxxxxxxxx>
  • To: "sugarshot@xxxxxxxxxxxxx" <sugarshot@xxxxxxxxxxxxx>
  • Date: Tue, 25 Nov 2014 20:31:02 +0100

I've been looking at this type of thermocouple. and I think it would have the 
same type of problem with a thermocouple type k. when in contact with the flame 
that can degrade. and if not degraded, I guess the temperature to be recorded 
will be the flame, as the capsule that houses the resistance is in contact with 
the flame.
we want to measure the temperature of the wall of the cone
From: vicente_alvero_14@xxxxxxxxxxx
To: sugarshot@xxxxxxxxxxxxx
Subject: [SS2S-Main] Re: Tempilstick
Date: Tue, 25 Nov 2014 20:17:57 +0100





Can you show some kind of this resistance?
Date: Tue, 25 Nov 2014 11:09:59 -0800
From: grants2@xxxxxxxxxxx
To: sugarshot@xxxxxxxxxxxxx
Subject: [SS2S-Main] Re: Tempilstick


  
    
  
  
    True, about melting thermocouples, but if that happens and it was a
    K thermocouple was mounted between the liner and motor case, the
    game was over long ago! Then use Pt resistance "thermocouples" if
    more than 1350 C is needed.

    

    btw multiple thermocouples don't need to be insulated from each
    other or the case at the junction.  Strange but true.  I brazed, TIG
    welded, and clamped three K thermouples on a sheet of steel, put it
    in the oven and the temperatures tracked appropriately.  That makes
    it easier to measure a liner at different places.

    

    Grant

    

    

    On 11/25/2014 9:32 AM, Hans Olaf Toft
      wrote:

    
    
      
      Thermocouples are cheap and work
        well, but if they are embedded in a sample that gets torched,
        they will at best record the surface temperature of the sample
        at the brief moment they are at the surface. It may work - and
        even provide usefull data - but an IR thermometer will read the
        surface temperature continuously.

        Hans

        On 11/25/2014 05:34 PM, Brian Su (Redacted sender 
cycloniterulez@xxxxxxxxx
        for DMARC) wrote:

      
      
        
        This one sure looks much better.

          

          Kind Regards,
          

          
          Brian Su.
          

          
          

          
          Sent from my iPhone.
        
        

          On 25 Nov 2014, at 16:27, Grant Saviers <grants2@xxxxxxxxxxx>

          wrote:

          

        
        
          
            
            Here is another ebay seller with all thermocouple options,
            packaging variations, temperature compensated junctions, and
            EMI filtering, etc.  Looks to be professional grade
            engineering:

            

            
http://www.ebay.com/itm/Quad-Channel-K-Type-Thermocouple-Amplifier-Conditioner-Analog-Output-AD8495-/331032888967?pt=LH_DefaultDomain_0&hash=item4d13190687

            

            On 11/25/2014 8:10 AM, Grant
              Saviers wrote:

            
            
              
              A type K thermocouple is good to 1250 C.  It will need a
              simple instrumentation amplifier to get the signal voltage
              to a range compatible with the Arduino A/D converter.  For
              about $10 in parts you can build your own IN-AMP.  There
              are several choices for single chip IN-AMPs that will do
              the job and here is a board from China for $10, and the
              chip output is 10mv/deg C.

              

              
http://www.ebay.com/itm/AD597-Ultimaker-Temperature-Control-Board-K-Thermocouple-Signal-Amplifier-/321597894984?pt=LH_DefaultDomain_0&hash=item4ae0ba7148

              

              Grant 

              

              On 11/25/2014 1:12 AM, flint
                hapirat (Redacted sender flinthapirat@xxxxxxxxx
                for DMARC) wrote:

              
              
                
                  One

                    comment - The tempilstick temperature pens are rated
                    between 38c-1093c...  
                  
                    Hope this
                      is still helpful.
                    

                    
                  
                  
                    
                      
                        
                            From:
                            Vicente Alvero Zambrano 
<vicente_alvero_14@xxxxxxxxxxx>

                            To:
                            "sugarshot@xxxxxxxxxxxxx"
                            <sugarshot@xxxxxxxxxxxxx>
                            

                            Sent:
                            Sunday, November 16, 2014 9:10 PM

                            Subject:
                            [SS2S-Main] Re: volunteering

                           
                        

                          
                            
                            
                              
                                Thanks


                                  for your reply Markus,
                                
                                
                                It

                                  is a good idea. The main problem I see
                                  is that we need to measure high
                                  temperatures. I do not know exactly
                                  how much, but around 1200ÂșC. And this
                                  only measures halfway. Do you know if
                                  there is a sensor for arduino with
                                  this possibility?
                                
                                

                                  

                                
                                
                                  
                                    From:

                                    m.bindhammer@xxxxxxxxxxx
                                    To: sugarshot@xxxxxxxxxxxxx
                                    Subject: [SS2S-Main] Re:
                                    volunteering
                                    Date: Sun, 16 Nov 2014 23:21:22
                                    +0800
                                    
                                    
                                    
                                      Hi Vicente,
                                      
                                      It is quite easy to build a data
                                      logger with an Arduino based micro
                                      controller, SD card, SD card
                                      socket, HEF 4050 voltage level
                                      shifter, DS1307 RTC and one (or
                                      more) MLX90614 IR thermometer(s)
                                      which communicate(s) over the I2C
                                      bus as well.
                                      I am just doing this for a medical
                                      project.
                                      
                                      Markus
                                      
                                      
                                        From:



                                        vicente_alvero_14@xxxxxxxxxxx
                                        To: sugarshot@xxxxxxxxxxxxx
                                        Subject: [SS2S-Main]
                                        volunteering
                                        Date: Sat, 15 Nov 2014 19:21:26
                                        +0100
                                        
                                        
                                        
                                          Hi all again,
                                          Although a long
                                            time do not talk about it,
                                            yet we continue the
                                            investigation of ablative
                                            materials.
                                          For the study of
                                            the material that will coat
                                            the nosecone of our rocket;
                                            Richard, Mattias and I
                                            already started last summer
                                            to work on it.
                                          
                                          
                                          Throughout this
                                            week, I've been talking to
                                            Hans, and he thought the
                                            possibility to also measure
                                            the temperature on the side
                                            of the wall that is in
                                            contact with the flame.
                                            Would be measured by an
                                            infrared thermometer.
                                          
                                          
                                          I am contacting
                                            you to see if anyone is
                                            interested, or know how, to
                                            attach an infrared
                                            thermometer with data logger
                                            that Liam is manufacturing
                                            for thermocouples.
                                          
                                          
                                          By this, we can
                                            obtain pairs of temperatures
                                            at the same point. Both
                                            outside and inside of the
                                            wall, in order to obtain
                                            among other data, values of
                                            thermal conductivity and
                                            heat capacity of each
                                            material.
                                          
                                          
                                          Thanks in
                                            advance for your cooperation
                                            and interest.
                                        
                                      
                                    
                                  
                                
                              
                            
                          
                          

                          

                        
                      
                    
                  
                
              
              

            
            

          
        
      
      

    
    
                                                                                
  

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