Clamp-On or Transit-Time? A Guide to Selecting the Right Ultrasonic Flow Meter
When it comes to non-invasive and highly reliable flow measurement, ultrasonic flow meters have become a go-to solution across industries ranging from water treatment to oil and gas. However, with multiple types available—especially clamp-on and transit-time designs—choosing the right one can be challenging. Understanding the differences, advantages, and limitations of each type is essential for optimizing performance, accuracy, and cost-efficiency in your application. Ultrasonic flow meters operate by sending high-frequency sound waves through a fluid to measure its velocity. The two primary methods are Doppler and transit-time, with transit-time being the most widely used for clean liquids and gases. Transit-time flow meters calculate flow based on the difference in time it takes for an ultrasonic signal to travel with and against the flow direction. This method offers high accuracy and is commonly used in custody transfer applications for natural gas and petroleum liquids, where pr...