The Transonic® TS420 Perivascular Flow and TS410 Tubing Modules require a T402 or T403 Console in order to take measurements. T402 and T403 Consoles are multi-channel capacity cases with a shared universal power supply.
To remove the module from the console (say for repair) unscrew the thumb-screw on the front panel and pull out the module. Afterwards, push the unit back into the console and use the thumb-screw to lock it into the console.