Students read how to set up the optical comparator edge detector in this interactive learning object.

The learner tests his/her ability to set up the optical comparator edge detector using a virtual simulation of the machine.

Learners examine the theory of operation for a combustible gas detector. A brief quiz completes the activity.

Learners study animations to see the connection between temperature and resistance as they examine the operation of an RTD. A table is used to convert resistance readings to the corresponding temperatures. A brief quiz completes the activity.

Learners examine how metal detectors function. This object includes animation and sound.