Question: sensors for non-contact level detection detect bulk material and opaque liquids without contact on the basis of the time of flight measurement of a laser beam.
Answer: --> Sensors for non-contact level detection detect bulk material and opaque liquids without contact on the basis of the time of flight measurement of a laser beam.

Question: and hundreds of voices joined in the chorus:
Answer: --> And hundreds of voices joined in the chorus:

Question: latest update : 3 march 2016 17:07
Answer:
--> Latest update : 3 March 2016 17:07