ABAT ABAT Sensors, Detectors & Detection Devices

Question 1

What type of motion detector uses both microwave and passive infrared technology to reduce false alarms?

Accepted Answer

Dual-technology (dual-tech) detector

Answer

Ultrasonic motion detector

Answer

Photoelectric beam detector

Answer

Vibration sensor

Question 2

A passive infrared (PIR) detector senses motion by detecting changes in which physical property?

Accepted Answer

Infrared radiation emitted by moving objects

Answer

Sound wave reflections

Answer

Microwave signal disturbance

Answer

Visible light interruption

Question 3

What is the primary advantage of a recessed door contact over a surface-mount door contact?

Accepted Answer

Concealed installation that is tamper-resistant and aesthetically cleaner

Answer

Higher magnetic strength for wider door gaps

Answer

Lower cost per unit

Answer

Compatible with aluminum door frames without modification

Question 4

Which type of glass break detector analyzes the acoustic frequency profile of breaking glass rather than just sensing vibration?

Accepted Answer

Acoustic glass break detector

Answer

Shock/vibration sensor

Answer

Passive infrared detector

Answer

Foil-on-glass sensor

Question 5

A magnetic door contact generates an alarm when the door is opened because the magnet moves away from the reed switch. What is the normal (secured) state of the reed switch contacts?

Accepted Answer

Closed (normally closed / NC)

Answer

Open (normally open / NO)

Answer

Alternating between open and closed

Answer

Floating (high-impedance state)

Question 6

What is the maximum recommended gap between a magnetic door contact and its corresponding magnet for reliable operation?

Accepted Answer

1/2 inch (12 mm)

Answer

1/4 inch (6 mm)

Answer

3/4 inch (19 mm)

Answer

1 inch (25 mm)