NEMA 4X instrument Front
PowerTune® pretune and adaptive tune
Universal input
Fully isolated inputs and outputs
The 535 is a 1/4 DIN single loop process controller (SLC) designed to control any analog process variable (temperature, pressure, flow level, etc.) in batch and continuous processes. The 535's outstanding feature mix enables it to bring processes under control faster, more accurately and easily than competitive SLC's, PLC, and PC based control systems.
The 535 is widely considered to be a best-in-class instrument due to three fundamental strengths. 
 

Rugged Construction
NEMA 4X 1/4 DIN panel and field mount versions
Thick damage resistant keys
EMI/RFI resistance
Input/output isolation
Operator Interface
3 line vacuum fluorescent display
English prompts and messages
Dual color backlit keys indicate controller state Available in Field Mount Case
Tuning and Control Algorithms
PowerTune® Adaptive tuning - Pretuning & Powerback anti-overshoot
8 stored PID sets
Multiple output algorithms