The VTFN300 Thermal Flow Switch with LED Digital Display utilizes a thermodynamic principle with two internal temperature sensors to measure flow rates by monitoring heat dissipation. This robust device features an all-metal housing and a 4-digit LED that provides a 330-degree rotatable indicator for easy reading of flow velocity or percentage. It offers a wide, programmable measuring span and supports versatile PNP, NPN, or various analog outputs like 4-20mA. Designed for user-friendly operation, it minimizes temperature drifting while offering multiple process connections for diverse industrial applications.