[Ticket Question] Optex AX 70-TN and a Optex SL 200QD

[secware3]

please advise me of the differences between an Optex AX 70-TN and a Optex SL 200QDP. The proposed location is no more than 20 metres. Does the more expensive unit have a technical advantage?

[secware3]

Optex AX 70-TN   has twin beams 20m range, single channel detector.

and a Optex SL 200QDP has quad beams with range if 60m, 4 selectable channels and adjustable beam power