The flow meter is calibrated by Calibrated Ultrasonic Flow meter. It has got two sensors which are mounted on the pipeline at a specific distance and without disturbing the system, flow is measured and compared with the device under calibration.
In this system, Flow & Temperature is measured by Calibrated instruments. These measured values are used to calculate the Energy in British Thermal Unit (BTU). This calculated value of Energy and the reading of the device under calibration is compared.