The PXF5APP2-MVVA1 is a self-tuning 1/8 DIN (48 x 96 mm) compact temperature and process controller from Fuji Electric, with a 50 ms sampling speed. The self-tuning algorithm adjusts PID parameters on the fly, so you don't need to babysit the loop during commissioning.
The 1/8 DIN form factor (48 x 96 mm panel cutout) is a standard size — drops into existing cutouts from other 1/8 DIN controllers without panel rework. Depth is compact enough for shallow enclosures; just watch the clearance behind the panel for wiring and the optional communications module if you add one.