FZ series

The RKC Instrument FZ series is modern and advanced series of temperature / process controllers with a very fast measurement frequency of only 0.05 seconds, which results in 20 PID calculations per second. This enables a very tight and accurate control of difficult to control processes.  The FZ has recipe storage for 16 settings and intercontroller communication for cascaded and master-slave functions. It is also possible to realize a two separate loop control (only with the FZ400/900).

The FZ series comes in three sizes:
– FB110
– FB400
– FB900

– Leaflet FZ series
– Instruction manual (part 1: hardware)
– Instruction manual (part 2: parameters/functions)

Click here to request a quotation for the FZ series.

CasCade control

Available with functionality that supports cascaded (master-slave) control. This can for example be used for burner control (master is the oven and the burner is the slave).

Measurement input switching

The FZ supports functionality to switch its measurement input from process value input 1 to process value input 2 at a certain previously adjusted temperature. This can for example used in applications where the lower part of the process is controlled with a S-type thermocouple, and the higher temperature ranges with infrared radiation thermometers.


With the COM K2 you can connect the service port of your controller to an USB port of your laptop/desktop. You can easily adjust the controller parameters using this interface.


With the free PROTEM2 software you can easily adjust the parameters of the controller. Click here to download the free software.