3 ms·
do you know anything about the wire temperature in these things? I looked at both links and didn't see any numbers outside the paywall. Another comment mentio
by nialo 10y ago
do you know anything about the wire temperature in these things? I looked at both links and didn't see any numbers outside the paywall. Another comment mentions a vapor temperature of <260C, but nothing about the wire temperatures.
Stainless or Kanthal at 500C or something should indeed be quite inert, it's just not that hot.
- jdietrich 10y ago200C to 260C is the normal temperature range, measured at the coil. Temperature-controlled devices use the coil itself as the temperature sensor by continuously measuring the resistance of the coil. The device calibrates each coil at room temperature when it is first installed. Stainless steel has a sufficiently high temperature coefficient of resistance to measure temperature quite accurately. Kanthal doesn't work with this method, because by design it has a very low temperature coefficient of resistance. Power-controlled devices rarely exceed 300C in normal use, because there is considerable airflow over the coil combined with evaporative cooling. Excessive temperatures can be reached if the device is inadvertently activated, or if the liquid flow to the coil is inadequate. As you say, kanthal and stainless steel should be very stable at these temperatures. Pure titanium wire also works with temperature control and completely avoids the issue of chromium, but there is some debate over the potential risks of titanium dioxide nanoparticles.