Can an Acculab motion detector work with LabPro?

Yes.

Acculab makes an adapter to connect their Sonic Ranger Module ALM-300 to LabPro. You can buy the adapter directly from Acculab. They call their adapter the "CBL-RJ11" adapter. You can contact Acculab at (916) 725-0942 or acculab@sensornet.com. Their website can be found at http://www.sensornet.com/

Vernier does not make an adapter that will work with this motion detector.