DIG-Tester For Insulated Glass
This detector has 2 positions: place the tester on a glass and push the button:
a)"present" position: if the red led lights up and the buzzer sounds,
a low-E coating is present on that pane (lite) of the glass.
b)"contact" position : if the red led lights up and the buzzer sounds
you know that the coating is on the surface the detector is touching.
