Conventional UV 4 wire Flame Detector Asenware

This Asenware UV flame detector uses the best flame sensor. It has a sensitive response and large detection angle, and it is consistent and long-term stable and reliable. The red LED indicators on the flame detector provide local 360° visual alarm indication. They flash every 5 seconds to indicate the detector is on and is working. When a flame is detected, the fire alarm will be triggered, the red LED indicator will be on, and the buzzer will make a loud alarm sound.

Reference: https://www.cityfireservice.com/products/flame-detector-asenware/