Models R3A and R3B are multifunction controllers with 48×96 mm and 96×96 mm front panels, respectively.
The control outputs include relay output and current output.ON/OFF control and PID control are supported.
With optional model codes, CT input, digital input, RSP input, RS-485 communication, and auxiliary output can be selected.

Model R15 is a 48 x 48mm compact digital indicating controller featuring group multi-range inputs and PID control system using new algorithms "RationaLOOP PID (Ra-PID)" and "Just-FiTTER".
Up to two control output points (this number of points may vary depending on the model) can be used, which are selectable from the relay contact and current.
Two kinds of mounting methods are provided, panel mounting type and socket mounting type.