a little more about heat
So kyle we learned something today.
I got a digital thermometer to try to read the temperature of coils in rebuildable and replaceable atomizers.
Why because I read this morning that Vegetable Glycerin decomposes to Acrolein at approximately 700 degrees F and I was wondering if the coils got that hot.
Well, the thermometer didn't work so well i couldn't read that small of a point.
But I noticed the coils we were testing were glowing at different colors from red up to almost white depending on the ohms of the coils, we also noticed the kanthal A1 oxidizing. So I did a search of temperature of kanthal by color.... nothing except for this
https://www1.elfa.se/data1/wwwroot/assets/datasheets/06080303.pdf
"The protective oxide layer on KANTHAL alloys formed at temperatures above 1000 deg C 1830 deg F consists mainly of alumina (AI2 O3) the color is light grey, while at lower temperatures (under 1000 C, 1830 F) the oxide becomes darker."
the picture shows four coils from left to right
#1 26 gauge unfired kanthal A1 coil .7 ohm ,
#2 28 gauge kanthal A1 coil is above 1 ohm normal firing.
#3 26 gauge kanthal A1 coilis a .7 ohm coil fired up to glow,
#4 26 gauge kanthal A1 coil is a .4 ohm coil fired up to glow
so from the pictures I would say coils #3 and #4 reached well into the 1400 F range double the safe temperature for Vegetable Glycerin! the .4 ohm coil did snap and the paper states that operational maximum for Kanthal wire below .4mm is 925c - 1050c, 1700F - 1920F meaning in all probability the coil reached a temperature of 1900 F
So kyle we learned something today.
I got a digital thermometer to try to read the temperature of coils in rebuildable and replaceable atomizers.
Why because I read this morning that Vegetable Glycerin decomposes to Acrolein at approximately 700 degrees F and I was wondering if the coils got that hot.
Well, the thermometer didn't work so well i couldn't read that small of a point.
But I noticed the coils we were testing were glowing at different colors from red up to almost white depending on the ohms of the coils, we also noticed the kanthal A1 oxidizing. So I did a search of temperature of kanthal by color.... nothing except for this
https://www1.elfa.se/data1/wwwroot/assets/datasheets/06080303.pdf
"The protective oxide layer on KANTHAL alloys formed at temperatures above 1000 deg C 1830 deg F consists mainly of alumina (AI2 O3) the color is light grey, while at lower temperatures (under 1000 C, 1830 F) the oxide becomes darker."
the picture shows four coils from left to right
#1 26 gauge unfired kanthal A1 coil .7 ohm ,
#2 28 gauge kanthal A1 coil is above 1 ohm normal firing.
#3 26 gauge kanthal A1 coilis a .7 ohm coil fired up to glow,
#4 26 gauge kanthal A1 coil is a .4 ohm coil fired up to glow
so from the pictures I would say coils #3 and #4 reached well into the 1400 F range double the safe temperature for Vegetable Glycerin! the .4 ohm coil did snap and the paper states that operational maximum for Kanthal wire below .4mm is 925c - 1050c, 1700F - 1920F meaning in all probability the coil reached a temperature of 1900 F