DIN is a German Association that is a member of the International Organization for Standardization (ISO).
The International Electrotechnical Commission (IEC)prepares and publishes International Standards for all electrical, electronic and related technologies.
The three organizations work in cooperation to develope DIN IEC Standard 61554 (2002-2008).
The standards for front and cut-out dimensions of measurement and control instruments for panel mounting are as follow:

Watlow Electric Manufacturing adheres to these dimensional standards which is one consideration in retrofitting obsolete products.

1/4 DIN are available in both horizontal and vertical with 1 & 2 Outputs; package sizes of:

3.95″ width (100.3mm)
3.95″ height (100.3mm)

Refer to diagram for inside mount sizes.

1-4 DIN

1/4-DIN Horizontal & Vertical, Watlow® EZ-ZONE® PM Primary Functions are available with following:

  • PID controller with thermistor input and profiling ramp/soak and battery back-up with real time clock
  • PID controller with thermistor input and profiling ramp/soak and battery back-up with real time clock