It’s a snap-on interface for electric meters ... destined to design at some point. All you need is a printed shell, a Wemos-compatible development board with an ESP32 MCU, an optical interface ...

Design and manufacture Broadband Pyroelectric Detectors & Radiometers, Optical Power Meters, Laser Joulemeters, Optical & Thermal TRAP Detectors & THz sensors. Products used to measure from pW-W, fJ-J ...