What type of devices can assist in detecting power line voltage?

Voltage testers and multimeters are specifically designed for measuring electrical voltage. These devices allow linemen and electricians to safely check the presence of voltage in power lines and other electrical systems. They provide immediate feedback on voltage levels and, in the case of multimeters, can measure a variety of electrical properties, including current and resistance, which are essential for diagnosing electrical issues and ensuring safety during maintenance or installation work.

Other options include infrared cameras and drones, which can assist in detecting heat signatures and visual inspections, but do not directly measure voltage levels. Ammeters and ohmmeters measure current and resistance, respectively, without providing voltage readings. Barometers and psychrometers are used to measure atmospheric pressure and humidity, and are not applicable to electrical measurements. Therefore, the correct devices for detecting power line voltage are indeed voltage testers and multimeters.