- Bidirectional measurements possible
- Very good price/performance ratio
- 1,5" up to 48"
- Large temperature range and pressure rates
Water
from 12 up to 220000 l/min
from 0 up to 150 °C
from 0 up to 68 bar
Water & waste water industry, Chemical industry
General information
The SDI series flow sensor offers unparalleled performance for liquid flow measurement in closed pipe systems. The impeller sensor is well suited for flow control, flow monitoring and batch type applications. The flow meter can be mounted in pipe sizes of 1,5" up to 48".
This sensor can be used for water applications or as stainless steel version for corrosive fluids at high temperatures and pressure rates. Bidirectional flow measurement or battery driven systems are available as option.
Technical data
Mounting in pipe sizes DN | 32 – 900** / 1,5 – 36“ |
Flow range in m/s (standard) | 0,1 – 6 |
Flow range in m/s (low flow) | - |
Accuracy (full scale / Qmax.) | ±1 % |
Accuracy (of reading) | - |
Repeatability (full scale / Qmax.) | ±0,5 % |
**or larger upon request |
Measuring principle
Impeller meters

The series feature a six-bladed impeller design with a proprietary, non-magnetic sensing mechanism. The impeller shape coupled with the absence of magnetic drag provides accuracy and repeatability throughout the flow range of the sensors. As the liquid flow turns the impeller, a low impedance square wave signal is transmitted with a frequency proportional to the flow rate.
Applications

Impeller meters in the water industry

Impeller meter in water distribution and water supply
Accessories
- Control panel mounted
- Pump control based on flow and pressure
- Pump control based on level and pressure
- Water feature...