Turndown Ratio：The ratio of maximum measure capacity to minimum measure capacity.
Below is the measuring range of various flowmeters:
➤ Variable area flowmeter (Rotameter)：0.05~3.5 m/s
➤ Other brand paddle wheel flowmeter：0.3~10 m/s
➤ LORRIC AxleSense paddle wheel flowmeter：0.15~10 m/s
➤ Ultrasonic flowmeter：0.1~20 m/s
Each flow measuring principle has its own physical limitation, which leads to different measurement ranges. Thus, users are recommended to select a suitable flowmeter based on their required measuring range and environment. Under a wider measuring range 0.3 ~ 10 m/s, the best linearity of all paddle wheel flow meters in the market is 0.5% FS (Full-scale error). If narrower measuring range is acceptable, the user can have better linearity in a smaller measuring range.
If users need higher precision in a smaller measuring range LORRIC recommends asking a system engineer for calibration services to reach a higher level of accuracy.
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