Types of illuminometers involved
1. Visual illuminance meter: difficult to use, inaccurate, and hardly used
2. Photoelectric illuminance meter: Silicon and selenium photocell illuminance meters are frequently employed
The photocell illuminance meter's components and usage specifications are as follows:
1. Components include a microampere, a shift knob, a zero point adjustment, a terminal, a photocell, a V() correction filter, etc.
Commonly used lux meters are silicon (Si) or selenium (Se) photocell illuminance meters.
