juhiloameetrid

Juhiloameetrid are instruments used to measure the brightness of pilot lights and indicator lamps in electrical equipment and signaling systems. The term is used in Estonian technical literature to refer to photometric meters that quantify the luminous intensity of small lamps used as indicators. They serve calibration, quality control, and readability assessments in manufacturing and maintenance.

Most juhiloameetrid are portable or benchtop devices. They rely on photodetectors—such as photodiodes or photomultiplier tubes—coupled with optics to isolate a defined field of view. Measurements are typically given in candela (cd) for luminous intensity or in lux (lx) at a specified distance, depending on the instrument. Some meters provide absolute measurements, others offer relative readings against a reference lamp. Many devices use a photopic spectral response to reflect human vision, with options to filter for the lamp’s spectral output (e.g., incandescent vs. LED).

Common applications include testing the brightness of dashboard indicators in vehicles, control panel lamps in industrial equipment, aviation and maritime signaling lamps, and status LEDs in consumer electronics. They help ensure readability under varying ambient light and verify that lamp brightness remains within specifications over time.

Related instruments include lux meters, photometers, and luminance meters. The term juhiloameetrid focuses on small, often fixed-intensity indicators rather than general room illumination.

Etymology and usage: the word combines juhilo-, meaning guiding or pilot light, with -ameetrid, meters. In Estonian texts, juhiloameetrid may appear in product specifications, laboratory protocols, and quality-control documentation.