The detector may be employed as either a passive detector and/or as a part of a combined detector and trap.

Magnetic field reversals are detected in the passive detector signal.

A biometric sensor, such as a passive infrared heat detector, can be used in conjunction with the field disturbance sensor to reduce possible false alarms.

AF metering with passive central cross-type sensor.

Focusing Autofocus metering with passive central cross-type sensor.

Autofocus metering with passive central cross-type sensor.

The passive infrared sensor (16) is used to detect the presence of human motion.

C-247 An Act to amend the Criminal Code (passive detection device)

The PestFree motion sensor detects movement in the protected area.

The LED tube comprises of end caps, longitudinal tube, electrical control circuits, passive infrared sensor with Fresnel lens and light sensor.

A miniature passive infrared motion detector contains an optical system, a pyroelectric polymer film and an electronic circuit.

The composition serves as a passive detector for vapor or liquid reactants when applied to selected surfaces as a paint.

The sound waves emitted by such an occurrence are what triggers a passive ultrasonic Sensor.

The sound waves emitted by such an occurrence are what triggers a passive ultrasonic Detector.

The sound waves emitted by such an occurrence are what triggers a passive detector.