The Fuji Electric PXF5AER2-0VCA1 is a self-tuning 1/8 DIN (48 x 96 mm) compact temperature and process controller with a 50 ms sampling speed.
The 1/8 DIN form factor (48 x 96 mm panel cutout) is a common footprint for temperature controllers, so it swaps into existing cutouts without panel modification. The 50 ms sampling speed suits it for closed-loop PID control on fast-reacting loads such as electric heaters or small furnaces.