Fisher Scientific is very well known in lab equip, so I expect the oven will be very well made. With 4600 watts I can see how it would heat up nicely, max temp I suspect will be very close to spec'd max temperature.
I do find interesting the specs on the temperature accuracy - note the ±27ºF. This is a combination of Type K thermocouple (standard accuracy is ±0.75% at 2,000ºF - or ±15ºF) as well as temperature controller limitations. Even type 1 type K TC is only ±8ºF at 2,000 ºF - and this is when new without the effects of aging. The Set Point Repeatability is very good at ±2ºF and is all we're really concerned about providing the oven is calibrated.
Another interesting spec for Average Temperature Uniformity of ±18°F - "IF" I understand that correctly, they are talking about how even the temperature inside oven is from min to max. That would indicate to me a blade could well be 36ºF difference from one end of blade to other end.
While the accuracy can be calibrated by the magnetic point of 1414ºF due to the close repeatability specs, the un-even heating could not be calibrated out. If a high quality lab type oven manuf'd by Fisher has a 36ºF spread in only a cubic ft model oven, what do you think the spread would be in the typical HT'ing oven of 24" long?
All this is from a newbie in HT'ing ovens, but many years in chemical plant process control.
Ken H>