The reason for Ti and Ni200 being used in TC regulated mods, is due to the such low resistance of Ti and Ni200 wire, finer detection of resistance increasing with heat is more accurate. Example, Ni200 wire at 0.12ohm cold temp gets fired up, as the wire heats up, the chip detects the wire increase resistance, 0.1205, 0.1300, 0.1305, etc. Do not know the calculations it is doing but give certain resistance it calculates the math to approximate only what the temperature of the coil is becoming. With an alloy like Kanthal A1, the chip would need to know what temperature alluminum, chromium, iron, ceramics, and other materials in the Kanthal alloy becomes in resistance the higher the temperature becomes.
TC controlled Kanthal mods are a long time down the road, 6months, maybe 18months down the road in development if at all possible. Ijoy claims they have a mod and chip that will do so, but like many first gen developments in e-cigs, I would wait for after release of the mod for a few months to see the reactions of others and what bugs to expect in the chip system. I have Vaporshark rDNA 40 I run a sub-tank plus with the RDA deck, 0.11 to 0.13 nickel Ni200 build in it, only two things I had to adjust to my normal micro-contact coils I use in my Kayfuns, use a space spiral rake coil, and added 4 more wraps on the coil (12wraps opposing leg compared to my normal 8 wrap opposing leg on my Kayfuns. Ni200 really isn't much harder to work with compared to Kanthal A1 or Nichrome, just remember it is softer so can distort easier than Kanthal (easily distorted if adjusted or meltdown if you get it to hot).
Even with Ni200 and Ti wire, the chips are not 100% accurate in temperature reporting, they are still using guestamation, so again we are months down the road for completely accurate TC mods.
i know now they use two companies chips, one is yihi, another is DNA 40, but all base on ni200 temp control.
