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 1200ºC. 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.
