ACU20FDR Series

◆ Thermal principle, fast response, high accuracy

◆ Tubular shunt, less prone to blockage

◆ Suitable for various low-pressure and high-pressure pipelines

◆ Short warm-up time, minimal zero drift, and high reliability

◆ Analog inputs/outputs can use secondary instruments or flow computers to control and display flow rates.

The ACU20FD is a high‑precision flow meter/controller with a measurement error of only ±0.5% of full scale. Its exceptional accuracy stems from a unique sensor probe: this hermetically sealed probe incorporates two sensing elements— a velocity sensor and a temperature sensor—enabling automatic compensation for the effects of temperature and pressure variations. The instrument’s electronic circuitry heats the velocity sensor to a constant temperature above that of the gas or liquid, then measures the cooling effect caused by the gas flow. Flow rate is calculated based on the principle that the electrical power required to maintain a constant temperature difference is directly proportional to the gas mass flow rate. Both sensors are standard‑grade platinum resistance temperature detectors (RTDs), sealed within a stainless‑steel housing.