Nickel coil and Temp Control

[Weedity]

Okay, I'm new to temperature control and have a few questions I'm hoping you fine people can help me with! I've looked around, learned some stuff, but still a tad lost. I've been looking around here for similar posts and questions but still am confused:

1. Nickel coil, I read it's bad to vape at too high a temperature because it releases "bad stuff". So why use nickel if it can potentially lead you to inhale bad fumes? Nickle coils. Convince me they're safe, or unsafe. : electronic_cigarette Why use temp control? I don't want bad stuff in my lungs, why not just stick with kanthal and VW? What are the benefits?

2. I'll be using smok TCT nickel coils at 0.15 ohms with a new version of the M80 Plus(fixed temp control) so what is a safe temperature to vape it at? 200-900 Degrees, I'm thinking 350?

 

[RandyF]

That is why we use nickel with temp control devices, to avoid high temps. The dangers you mentioned with nickel don't happen under 600F, from what I understand, but I am no metallurgist. With the M80, I really don't know what temp would be safe, from my understanding it is a wildly inaccurate device.

First thing you should do is set it to 420F and fire it with a dry cotton. Nothing should happen and the cotton should remain white, if it burns it then I wouldn't even use it in TC mode.

 

[Weedity]

That is why we use nickel with temp control devices, to avoid high temps. The dangers you mentioned with nickel don't happen under 600F, from what I understand, but I am no metallurgist. With the M80, I really don't know what temp would be safe, from my understanding it is a wildly inaccurate device.

First thing you should do is set it to 420F and fire it with a dry cotton. Nothing should happen and the cotton should remain white, if it burns it then I wouldn't even use it in TC mode.

Yeah I read that, but with the new V006 and V007 firmware updates it's supposed to be much more accurate now. So I hear.

 

[RandyF]

Testing TC mode will tell you all you need to know.

I run my rDNA40's at 450F and can vape my wicks dry without burnt hits, above that (and depending on your cotton) you run the risk of burning it if your wick gets dry. I use nickel to avoid dry hits, so 450F is my limit.

 

[Completely Average]

We use nickel for temperature control builds because nickel has significantly increases resistance as it's heated up, and since the resistance changes are a constant it's easy to make a simple table to calculate the temperature based on the amount of resistance change. For example a nickel coil will increase by roughly .5ohms when heated to 450 degrees, so you measure the coil resistance at room temperature and when you've measured a .5ohm increase above that you know you've heated the coil by 450 degrees.

Kanthal doesn't change resistance enough when heated to be accurately measured by a cheap ecig mod. Resistance changes will be less than .1ohms so you would need some very expensive metering equipment to accurately measure the temperature based on resistance changes.


As far as safety goes, anything below 600F is perfectly safe as far as the nickel is concerned. In an open air environment a fully saturated wick won't burn below 525F, but inside a chimney with restricted airflow that temperature will be lower.