Temperature control vaping explained, wire by wire

Fit a new coil and many box mods stop to ask whether it is new, then offer a menu reading Ni, Ti, SS and TCR. It is tempting to back out and return to watts. Those letters are the heart of temperature control vaping, and they are not decoration.

Pick the wrong one and the chip calculates from the wrong metal, so a setting that looks precise no longer is. This guide sets out what the mod needs from you, wire by wire.

What Ni, Ti and SS mean in temperature control vaping

Ni, Ti and SS are the three temperature control modes, TC for short, found on many box mods. Each abbreviation names the metal the coil is wound from, Ni for Ni200 nickel, Ti for titanium and SS for stainless steel, usually labelled SS316 or SS316L.

In these modes you stop setting a power in watts and set a temperature ceiling in degrees instead, and the mod adjusts its own output so the wire does not exceed it. The mode therefore has to match the wire actually fitted, or the mod reasons from a different metal altogether.

With a Kanthal coil, none of the three applies and variable wattage remains the right setting. The fourth label, TCR, is a manual version of the same idea.

How a mod reads temperature without a thermometer

Everything in temperature control vaping rests on one physical fact. A mod has no probe touching the coil. It measures the wire’s resistance, which rises as it heats, and converts that change into degrees using a coefficient specific to each metal, which is why it needs to know both the metal and the coil’s resistance at rest.

The same principle rules out Kanthal, whose resistance barely shifts as it heats and so leaves the chip almost nothing to read. Nickel, titanium and stainless steel, by contrast, change resistance clearly and predictably with temperature.

Another point guides rarely mention is that the accepted resistance range can narrow in TC. Eleaf’s own specification for the iStick Pico gives 0.05 to 1.5 ohm in temperature control against 0.1 to 3.5 ohm in variable wattage. A 1.8 ohm coil, usable in watts on that mod, therefore falls outside the range it supports in TC.

Which wire suits Ni, Ti or SS

The metal is printed on the coil’s box, on the coil itself or on the spool for a rebuildable build. The table below pairs each label with the mode it calls for.

Label on the coil	Mod setting	Variable wattage
Ni200 (nickel)	TC-Ni	No
Ti (titanium)	TC-Ti	No
SS316 or SS316L (stainless steel)	TC-SS	Yes
Kanthal A1	No TC mode	Yes
Nichrome Ni80 or N80	No TC mode	Yes, preferably

The other markings on a coil box, starting with the ohm value and the wattage range, are explained in our guide to vape coils and tanks.

The Ni trap on a spool of wire

On spools of resistance wire, Nichrome 80 is often shortened to Ni80, N80 or simply Ni. It is not pure nickel and does not belong in TC-Ni, which is designed for Ni200. Selecting that mode with nichrome hands the mod the coefficient of another metal, and specialist retailers steer this wire towards variable wattage.

Stainless steel, the one wire that works both ways

Stainless steel is the only one of the three compatible metals that also runs in variable wattage, so an SS316L coil can move between modes without any change of hardware. Nickel and titanium work in temperature control only, and are best left to experienced users who follow their mod’s manual.

Setting up temperature control vaping in five steps

Once the wire is identified, the set-up for temperature control vaping always follows the same order, even if the menu labels vary from one brand to the next.

1. Check the material. Without Ni200, Ti or SS on the box or the coil, stay in variable wattage.
2. Fit the coil cold and confirm its resistance. Whenever the coil changes, the mod shows the measured value and asks you to confirm it. Do this at room temperature, never straight after a puff, or the reference value is skewed and every temperature calculated from it is skewed too.
3. Select the mode for the wire. TC-Ni for nickel, TC-Ti for titanium, TC-SS for stainless steel, and nothing else.
4. Set the temperature ceiling. Mods generally allow 100 to 315°C. Specialist retailers suggest starting somewhere between 200 and 250°C, then adjusting in small steps.
5. Set the maximum wattage. On some mods, the wattage set in TC decides how quickly the wire reaches the chosen temperature, for a sharper or gentler ramp. Stay within the range printed on the coil or its box.

Temperature control does not change the draw. Airflow and coil resistance decide your vaping style, a choice our comparison of MTL or DTL vaping works through in detail.

TCR, the manual mode for experienced users

TCR, short for temperature coefficient of resistance, uses the same calculation, but you enter the metal’s coefficient yourself instead of relying on the mod’s presets. It exists for wires that match none of the device’s Ni, Ti or SS modes.

Retailers reserve it for experienced vapers, and for good reason. With a wrongly entered coefficient, the mod calculates a temperature that no longer matches the wire. Without the exact value from the wire’s manufacturer, stick to the preset modes or to variable wattage.

What temperature control changes, and its limits

TC is neither a gimmick nor an absolute safeguard. It answers one specific problem, and part of the hardware on sale simply does not offer it.

What TC aims to prevent

In variable wattage, coil temperature depends on the balance between the power sent and the liquid cooling the wire. When the wick runs dry, nothing holds the heat back, and a dry hit, that familiar burnt taste, follows. TC aims to prevent that by capping the temperature.

It does not rule it out in every case. An empty tank or a gunked coil still cause dry hits, and British refillable tanks hold 2 ml at most, so keeping an eye on the liquid level matters. A wrongly chosen mode also deprives the mod of the accurate reading it depends on.

Where it is missing

Temperature control vaping is not available on every device. Mechanical mods have no chip and therefore no temperature control, and some e-cigarettes lack it too, which only the manual will tell you. For a pod kit such as the Oxva VPrime, the manufacturer describes its settings in watts and airflow rather than in degrees.

FAQ

Five questions tend to come up once the first settings are done.

Should I set the temperature in Celsius or Fahrenheit?

The choice only changes the display. To convert, multiply degrees Celsius by 1.8 and add 32. So 230°C gives 446°F, and the usual 315°C ceiling works out at 599°F, rounded to 600 on mod menus.

Is TC mode a good place to start?

It asks for more care than variable wattage, which remains the simpler entry point. If you want to try it, start with stainless steel, which retailers present as easier to get on with, and leave nickel and titanium for later.

Why does my mod show M1, M2 or M3?

They are memory slots for TCR mode. On mods that have them, each one stores a coefficient entered by hand, which saves typing it again every time you change wire.

Will a tank coil work in TC?

Yes, if its box or body names a compatible wire, nickel, titanium or stainless steel. Without that marking, assume it does not and run it in watts, within the printed wattage range.

Is the displayed temperature the vapour temperature?

No. The mod estimates the wire’s temperature from the change in its resistance. The figure is a reference for setting up, not a measurement of the vapour you inhale.

Temperature control vaping comes down to the wire

Temperature control reads the wire’s resistance to work out its heat, and its accuracy depends on what you tell the mod. Four steps cover it, choosing the mode for the metal fitted, confirming the value cold, starting from a moderate temperature and keeping the wattage inside the coil’s range.

If your coil carries none of the Ni, Ti or SS markings, variable wattage is the right setting and temperature control vaping simply does not apply. The mode is only one part of a well set up device, alongside draw, coil and liquid, all of which our other settings guides cover.

Editorial content for adult readers only. Vaping products can contain nicotine, a substance that causes addiction, and nicotine vaping products are not for sale to anyone under 18 in the UK. This article is not a buying recommendation.