Thermocouples required dissimilar metals or they won't work. You might want to address that in this video and specify the metal types the wires are made of.
You just buy thermocouple type "x" wire you want to make a thermocouple out of, if you buy thermocouple k type wire you get the correct two alloys. The wire comes in different qualitys which affects the accuracy but all are basically the same, k-type wire is used to make a k-type thermocouple and so are all the other types.
Hi @Nobody Youknow ~ Fist, thanks for leaving your comment, we appreciate your coming by. Second @robber576 is spot on with his answer. Third, we have a free white paper on the basics of thermocouples that you might also find helpful, no registration required: www.qats.com/Qpedia-Article/Qpedia_Feb07_Thermocouples Fourth, Omega has a handy reference guide on thermocouples you may also find helpful www.omega.com/en-us/resources/thermocouples-sheath-material-and-temperature-limits
+Amit Sharma asked: "Hi, can you show us the welding and closing process of K type thermocouples with 6mm mineral insulated wire" Hi Amit - I am sorry but we don't have K type wire in our lab. MOst of the applications we work with don't have such extreme temperature requirements which would require that kind of insulation. The biggest differences between what we use and K type wire would probably be stripping the insulation of the wire.
An interesting application would be to use the copper of a PCB as one of the metal, with the other being constantan. I was looking for a way to do a thermocouple without a thermistor or a thermadam .... ok, I'll get out.
Hi The SegaHolic - Thank you for stopping by our UA-cam Channel. There are two places you can get this kind of welder, there may be others but these two are ones we've used: (1) DDC Corporation sells their thermocouple welders directly. www.dcccorporation.com/index.html (2) Omega Engineering also offers a couple of models. www.omega.com/en-us/accessories/tools/c/welders?view=list
Cool demo on the process, but since a themocouple require two different aloy compositions of the wires, I am curious what are the two metals in the insulated wires?
We generally use type J thermocouples, which has one wire of iron, and the other of Constantan (a copper alloy). There are many resources on the internet which will tell you the alloys used in other types of thermocouples, and the color codings that are used to identify them.
I guess you need to be advanced to get this video. It never mentions what kind of wire is used. Two different metals in the wire? Why twist? I'm dumb so it generated more questions than answers.
Raethan Moniker, The techniques shown in this video apply generally to the many different types of thermocouple wire that are available. We twist the wire together so that the wires remain close together until the time that the actual spot weld gets formed. After the spot weld is formed, if twisted wire remains, we suggest untwisting them for the best thermocouple accuracy. Thanks for watching!
I observed years ago that a type k can be easily made by just twisting the wires together, if found no difference in measuring between a self bodged thermocouple and a factory made sensor. By doing this the company i worked for had a financial advantage over the competitor who used expensive real thermocouple sensors while i made them homemade out of k-type wire twisted together and secured with a copper crimp connector.
I have an MPPT lead or lithium solar charge controller intended to be mounted right next to battery. A fairly inexpensive unit typically used for solar powered street lamps. The controller has small tail of wire with an in the air thermocouple on the end to measure temperature for controlling charge based on temperature of space around battery. The wire with sheath is only 2 or so MM in size and the thermoucouple secion itself only maybe half cm in width... I would like to move this thermocouple (thus allow for battery to be far away) with about 25 feet of compensating extension wire .. do you have any suggestions for me? all the wire is black. I have picture if it would help.
Thankyou.the one l use is a heat one on hot water .old 96 Bosch can l solder the wire back in .the tip it fell out.what is the tip made of that is in the pilot flame? Thankyou
+Persian5word -- That is a good point - having a long twisted section could lead to inaccurate thermocouple readings. This is addressed in the current (January 2016) issue of Qpedia, which you can read here: www.qats.com/Qpedia-Thermal-eMagazine/Back-Issues. However, when we make thermocouples, we burn it back to the insulation, so that there is no twisted section left.
+Hugo Cruz Valeriano -- The accuracy of the thermocouples you make are just as good as the pre-made units you can buy from a store. Following some of the suggestions in the January 2016 issue of Qpedia (www.qats.com/Qpedia-Thermal-eMagazine/Back-Issues) will help you maintain accuracy. One of the things that does affect accuracy is the grade of the wire that you buy. Most common thermocouple types are available in “standard” and “Special Limits of Error” wire which has a tighter tolerance on the readings.
mk cyber, There are many guides online which describe thermocouple characteristics. For example, the Omega Engineering website has one here: www.omega.com/techref/colorcodes.html and it summarizes the useful temperature ranges, color codes, and other qualities of the various thermocouple types. As for testing them, if you don’t have some sort of calibrated temperature reference, you could use an ice bath and a boiling water bath to check at 0° and 100°C. Thanks for watching!
LOS SENSORES DE TEMPERATURA SON ELEMENTOS FUNDAMENTALES EN TODO PROCESO DONDE SEA NECESARIO EL CONTROL DE LA TEMPERATURA, SIENDO LOS ENCARGADOS DE ENVIAR LA SEÑAL A LOS CONTROLADORES.
De acuerdo, son realmente fundamentales. Pero en el caso de nuestro video, realmente los estamos utilizando con el propósito de medir la temperatura para hacer análisis. Aún así, es retroalimentación. ¡Gracias por dejar un comentario y visitar nuestro canal!
+Incroyable monde -- We typically use J type thermocouples, which are made from one strand of iron and one strand of constantan (a copper alloy). K type is also very popular, but J has a little higher sensitivity. We also avoid T type, because one strand is copper, which is much better at conducting heat away from the test subject and could affect the test results.
That’s a good point - in our labs we end up testing a lot of different devices of many different sizes, so we have some cases where this matters, and others that it doesn’t. We try to avoid confusion by minimizing the different types of thermocouple wire that we have on hand. So we use several different wire gauges, but they are all J type.
As we alluded to in another comment, our main use for thermocouples is lab testing, not production. We rarely need to use more than a couple dozen, so our techniques reflect that. For higher volume use, there are many different options for automatic wire strippers available.
+Advanced Thermal Solutions, Inc. this is for test. nearly 3000 t.c.. Spacecraft thermal vacuum chamber you would think Omega would have a tool for stripping tc wire. we use Type T as it is more accurate at liquid nitrogen temp. I haven't figured out how many miles of tc we,ll use
Thermocouples required dissimilar metals or they won't work. You might want to address that in this video and specify the metal types the wires are made of.
You just buy thermocouple type "x" wire you want to make a thermocouple out of, if you buy thermocouple k type wire you get the correct two alloys.
The wire comes in different qualitys which affects the accuracy but all are basically the same, k-type wire is used to make a k-type thermocouple and so are all the other types.
Hi @Nobody Youknow ~ Fist, thanks for leaving your comment, we appreciate your coming by. Second @robber576 is spot on with his answer. Third, we have a free white paper on the basics of thermocouples that you might also find helpful, no registration required: www.qats.com/Qpedia-Article/Qpedia_Feb07_Thermocouples Fourth, Omega has a handy reference guide on thermocouples you may also find helpful www.omega.com/en-us/resources/thermocouples-sheath-material-and-temperature-limits
Glad we could help!
+Amit Sharma asked: "Hi, can you show us the welding and closing process of K type thermocouples with 6mm mineral insulated wire"
Hi Amit - I am sorry but we don't have K type wire in our lab. MOst of the applications we work with don't have such extreme temperature requirements which would require that kind of insulation. The biggest differences between what we use and K type wire would probably be stripping the insulation of the wire.
"... and the steadiness of your hand is aided by the ATS welder's emission of a melodious note".
Helped me get a project done. Thanks.
An interesting application would be to use the copper of a PCB as one of the metal, with the other being constantan.
I was looking for a way to do a thermocouple without a thermistor or a thermadam .... ok, I'll get out.
Good video but it would be nice if you could show the bead which was formed to give an idea of what a good weld looks like.
Thanks Sean, great idea. If we re-shoot the video we'll see if we can include that. Thanks for watching!
So where can I get that kind of welder?
Hi The SegaHolic - Thank you for stopping by our UA-cam Channel. There are two places you can get this kind of welder, there may be others but these two are ones we've used:
(1) DDC Corporation sells their thermocouple welders directly.
www.dcccorporation.com/index.html
(2) Omega Engineering also offers a couple of models.
www.omega.com/en-us/accessories/tools/c/welders?view=list
Cool demo on the process, but since a themocouple require two different aloy compositions of the wires, I am curious what are the two metals in the insulated wires?
We generally use type J thermocouples, which has one wire of iron, and the other of Constantan (a copper alloy). There are many resources on the internet which will tell you the alloys used in other types of thermocouples, and the color codings that are used to identify them.
I guess you need to be advanced to get this video. It never mentions what kind of wire is used. Two different metals in the wire? Why twist? I'm dumb so it generated more questions than answers.
Raethan Moniker,
The techniques shown in this video apply generally to the many different types of thermocouple wire that are available. We twist the wire together so that the wires remain close together until the time that the actual spot weld gets formed. After the spot weld is formed, if twisted wire remains, we suggest untwisting them for the best thermocouple accuracy.
Thanks for watching!
for k type thermocouple, the two different metals are: Chromel (Ni-Cr) and Alumel (Ni-Al) (-)
Is the welding required, or can you leave the wires only twisted together.
I observed years ago that a type k can be easily made by just twisting the wires together, if found no difference in measuring between a self bodged thermocouple and a factory made sensor.
By doing this the company i worked for had a financial advantage over the competitor who used expensive real thermocouple sensors while i made them homemade out of k-type wire twisted together and secured with a copper crimp connector.
I have an MPPT lead or lithium solar charge controller intended to be mounted right next to battery. A fairly inexpensive unit typically used for solar powered street lamps. The controller has small tail of wire with an in the air thermocouple on the end to measure temperature for controlling charge based on temperature of space around battery. The wire with sheath is only 2 or so MM in size and the thermoucouple secion itself only maybe half cm in width... I would like to move this thermocouple (thus allow for battery to be far away) with about 25 feet of compensating extension wire .. do you have any suggestions for me? all the wire is black. I have picture if it would help.
Thankyou.the one l use is a heat one on hot water .old 96 Bosch can l solder the wire back in .the tip it fell out.what is the tip made of that is in the pilot flame? Thankyou
can I use a banana plug connector at the other ends?
Hi, can u show us the welding and closing process of K type thermocouple with 6.0 mm mineral insulated wire. ?
Very helpful, Thanks
good useful for m y students
The video is nice and informative. if you are searching for Thermocouple manufacturing please visit our video ua-cam.com/video/yoVnLRLmK_k/v-deo.html
he failed to mention that you gotta untwist the twisted portion!!!
+Persian5word -- That is a good point - having a long twisted section could
lead to inaccurate thermocouple readings. This is addressed in the current
(January 2016) issue of Qpedia, which you can read here: www.qats.com/Qpedia-Thermal-eMagazine/Back-Issues. However, when we make thermocouples, we burn it back to the insulation, so that there is no twisted section left.
the accuracy of one of this is as good as a thermocouple from a store? how can i know it?
+Hugo Cruz Valeriano -- The accuracy of the thermocouples you make are just as good as the pre-made units you can buy from a store. Following some of the suggestions in the January 2016 issue of Qpedia (www.qats.com/Qpedia-Thermal-eMagazine/Back-Issues) will help you maintain accuracy. One of the things that does affect accuracy is the grade of the wire that you buy. Most common thermocouple types are available in “standard” and “Special Limits of Error” wire which has a tighter tolerance on the readings.
Thanks :)
could u tell me what wire we have to use and how to test ?
mk cyber,
There are many guides online which describe thermocouple characteristics.
For example, the Omega Engineering website has one here: www.omega.com/techref/colorcodes.html
and it summarizes the useful temperature ranges, color codes, and other qualities of the various thermocouple types.
As for testing them, if you don’t have some sort of calibrated temperature reference, you could use an ice bath
and a boiling water bath to check at 0° and 100°C.
Thanks for watching!
ok i will try thanks !
I thought to make a thermocouple work you need two conductors wire from different metals.
www.newark.com/omega/ff-k-24s-twsh-1000/thermocouple-wire-type-k-24awg/dp/43AC9180#anchorTechnicalDOCS
Yes.
LOS SENSORES DE TEMPERATURA SON ELEMENTOS FUNDAMENTALES EN TODO PROCESO DONDE SEA NECESARIO EL CONTROL DE LA TEMPERATURA, SIENDO LOS ENCARGADOS DE ENVIAR LA SEÑAL A LOS CONTROLADORES.
De acuerdo, son realmente fundamentales. Pero en el caso de nuestro video, realmente los estamos utilizando con el propósito de medir la temperatura para hacer análisis. Aún así, es retroalimentación. ¡Gracias por dejar un comentario y visitar nuestro canal!
The spot welding should be done in Argon
What is the metal used ?
+Incroyable monde -- We typically use J type thermocouples, which are made from one strand of iron and one strand of constantan (a copper alloy). K type is also very popular, but J has a little higher sensitivity. We also avoid T type, because one strand is copper, which is much better at conducting heat away from the test subject and could affect the test results.
Avoiding T type because of thermal conduction is only valid for test subject with very little mass, several grams
That’s a good point - in our labs we end up testing a lot of different devices of many different sizes, so we have some cases where this matters, and others that it doesn’t. We try to avoid confusion by minimizing the different types of thermocouple wire that we have on hand. So we use several different wire gauges, but they are all J type.
I need to strip sheathing from T.C. cable. I need to strip hundreds of T.C. cables. Your method of wire stripping takes to long
As we alluded to in another comment, our main use for thermocouples is lab testing, not production. We rarely need to use more than a couple dozen, so our techniques reflect that. For higher volume use, there are many different options for automatic wire strippers available.
+Advanced Thermal Solutions, Inc. this is for test. nearly 3000 t.c.. Spacecraft thermal vacuum chamber
you would think Omega would have a tool for stripping tc wire. we use Type T as it is more accurate at liquid nitrogen temp.
I haven't figured out how many miles of tc we,ll use
О чем идет речь?