... Monitor 1. on-line intelligent instruments 2.OLED display screen SF6 Moisture Density Monitor1NA1100DP SF6 online moisture density monitors ... (extra) high voltage transformers,2.GIS and other large electrical devices, mainly used for monitoring the moisture in ... mainly comprises (humidity, temperature, pressure) sensors, SCM, OLED display screen and other components. Signals are detected, amplified and sent ...