The larger table gas evacuation fan has a higher fan capacity between 1.0 - 20.0 lpm and comes with an on /off switch on cable with power supply in a set.
For regulation of the external flow we have a separate small electronic device with integrated on/off switch
Electronic Regulator
This device will be used mostly for MRI/CT application, when a fan system is not available and for gas evacuation in vet cabinets.