21.   In this mode, the mines would detonate whenever an approaching person tripped either a wire or an electronic sensor.

22.   It is just that much of the food being tried out on focus groups has been tried out on electronic sensors first.

23.   More than five miles of copper-lined cable was laid to provide power to the electronic sensors and monitors buried deep inside the shafts.

24.   No one expects the electronic sensors to match the range of a natural nose.

25.   Once at the airport, reporters and their equipment were searched by Secret Service agents using electronic sensors and dogs.

26.   Rather, they sit in control rooms and monitor TV images of the sky recorded by hypersensitive electronic sensors in telescopes.

27.   Subjects also are hooked up to electronic sensors that measure heart rate, respiration, blood pressure, body temperature and brain wave activity.

28.   The exhaust gases are then passed through an electronic sensor, which analyzes their oxygen concentration.

29.   The McAllen, Laredo and Del Rio sectors also are receiving new vehicles, walkie-talkies, television monitors and electronic sensors.

30.   The nettlesome defects that made electronic sensors and other devices unreliable sous-chefs a decade or more ago have largely been corrected.