A wii sensor bar does not actually contain any sensors. There are 2 arrays of IR blasters, which you can see with a digital camera, if it does not filter IR light(iPhones filter it out, i think). The front of the wiimotes contains a sensor to detect IR light sources.
Most 3rd party sensor bars are said to be of bad quality, which means your wiimotes might have trouble detecting them properly. I'm happy with my PowerA Ultra Sensor Bar, but i think it's kinda impossible to get today, and it eats batteries like crazy.
The Mayflash DolphinBar is a sensor bar combined with a bluetooth adapter, that is not exposed as a bluetooth adapter to your computer. This means you can't use it for passthrough, but on the hand hand it works pretty well out of the box without messing with drivers much. If you go that route, make sure it's on the latest firmware and automatically turns off when no wiimote is connected. Otherwise you'll run into the problem that one or more IR LEDs burn out, making it useless as a sensor bar, which might happen anyway, if you are unlucky. Combining real wiimotes using a DolphinBar and other bluetooth devices shouldn't be a problem, but you need another bluetooth adapter for this, as the DolphinBar does not support other controllers(at least as far as i know).
Using wiimotes and BT controllers at the same time might work, but only in the non passthrough mode, which i have never tried personally. In passthrough mode, the passthrough driver for the bluetooth adapter replaces the normal bluetooth driver and you can't use that dongle at the same time for normal bluetooth devices. If you have 2 BT adapters, you could mix regular bluetooth devices with passthrough, although that's a bit more complicated to setup and i'd recommend 2 different BT adapters for this.
Most 3rd party sensor bars are said to be of bad quality, which means your wiimotes might have trouble detecting them properly. I'm happy with my PowerA Ultra Sensor Bar, but i think it's kinda impossible to get today, and it eats batteries like crazy.
The Mayflash DolphinBar is a sensor bar combined with a bluetooth adapter, that is not exposed as a bluetooth adapter to your computer. This means you can't use it for passthrough, but on the hand hand it works pretty well out of the box without messing with drivers much. If you go that route, make sure it's on the latest firmware and automatically turns off when no wiimote is connected. Otherwise you'll run into the problem that one or more IR LEDs burn out, making it useless as a sensor bar, which might happen anyway, if you are unlucky. Combining real wiimotes using a DolphinBar and other bluetooth devices shouldn't be a problem, but you need another bluetooth adapter for this, as the DolphinBar does not support other controllers(at least as far as i know).
Using wiimotes and BT controllers at the same time might work, but only in the non passthrough mode, which i have never tried personally. In passthrough mode, the passthrough driver for the bluetooth adapter replaces the normal bluetooth driver and you can't use that dongle at the same time for normal bluetooth devices. If you have 2 BT adapters, you could mix regular bluetooth devices with passthrough, although that's a bit more complicated to setup and i'd recommend 2 different BT adapters for this.