Possible Questions:
- Detection device
- Gillette razor brand
- Security device
- Detecting device
- Motion detector, e.g.
- Security system part
- Motion detector part
- Motion detector
- Electric eye, e.g.
- Electric eye, for example
- Signaling device
- Security system component
- Heat detector, e.g.
- Electric eye, for one
- Burglar-alarm component
- Stimulus-response device
- Security system feature
- Security system device
- Motion picker-upper
- Gauge of heat or light, e.g.
- USS Enterprise device
- Thermostat component
- Thermometer, e.g.
- Signal-detecting device
- Radar gun, for one
- Quattro competitor
- Probe's kin
- Photoelectric eye
- Photoelectric cell
- Perceptive device
- Part of a security system
- One picking up speed, say?
- Light-detecting device
- Light or sound detector
- It picks up readings
- It might set off a light
- It can open doors for some people
- Impulse conveyer
- Home security system component
- High-tech detector
- Heat-detecting device, e.g.
- Garage door device
- Electric eye, for instance
- Ear or eye
- Digital-camera part
- Device connected to a control panel
- Calibrated component
- Burglar alarm component
- Automatic-door feature
- Alarm component