Metcal but no temperature control?
The temperature control is in the tip cartridge.  This is one of the biggest advantages of a system like this, you never need to calibrate it.  If the temp is "off" you throw out the tip cartridge and get a new one.  The temperature regulation is also extremely good.

You can buy tips for different temperatures, for the MX-500 (What i use) there are 4 different temperature control ranges.  For the part you linked there are 3 temp ranges:  

"F = FR4 / Fiber Glass for most standard applications. Two other series also available, just replace F with either T or C. T = Temperature Sensitive, C = Ceramic"  

When you order tips use F/T/C in the tip part number to get the correct temp range.

I don't know about the tips for the part you listed but the MX-500 tips the 4 temperature grades are 575F,675F,775F,905F.  

Judging by the name of the temperature grades for the iron you linked either the 575 or 675 is the one thats not available.