Related Clues:

• Gauge of heat or light, e.g.
• Touchtone array
• Electric eye, for one
• Security device
• Detection device
• ATM panel
• Touchtone feature
• Home security component
• Motion picker-upper
• It might set off a light
• Feature of some locks
• Garage door device
• Calibrated component
• ATM part
• Thermometer, e.g.