- Compact size
- Measurement in any meter orientation
- Operating pressure up to 362.50 psi (25 bar)
- Temperature range of –4…212° F (–20…100° C)
- Accuracy of ± 3%
- Resolution up to 83,000 ppg (22,000 ppl), depending on the model
- NSF/ANSI Standards 61 and 372 Certified
- K-Factor: See Product Data Sheet VIS-DS-00020-EN-12
The Vision Turbine Meters comply with the lead-free provisionsof the Safe Drinking Water Act. Available models include metersthat are:
- Bisphenol A (BPA)-free
- Certified to NSF/ANSI Standards 61 and 372
MEASURING PRINCIPLEThe rotor is turned by the liquid force proportional to flow. A Halleffect sensor supplies pulses that can be used for digital or analogsignal processing. The generated pulses are specified as a K-factor.
OPERATING PRINCIPLELiquid flow causes a bladed turbine inside the meter housing to turn at an angular velocity directly proportional to the velocity of the liquid measured. As the blades pass beneath a magnetic pickup coil, a frequency signal is generated. Each pulse is equivalent to a discrete volume of liquid. The frequency pulse is directly proportional to the turbine angular velocity and the flow rate. The large number of pulses provides high resolution. As the mass of the turbine is small, the response time is fast. It is not necessary to install a straight length of pipeline upstream of the meter. The simple mechanical construction of the Vision meter provides a long lifespan without any loss of accuracy. Pressure spikes less than the burst pressure rating do not affect the measurements.
