They are machines appreciated for the precision on measurement, the compactness, the reduced dimensions, the easiness of installation and the optimal quality /price ratio. They are equipped with a small magnetic sensor that gives an electrical signal proportional to the speed of the spinning of the rotor (and therefore to the flow); they are good for the measurement of a wide gamma of liquids as warm/cold water and chemical products, acids, alkalis, both viscous and aggressive. ND SERIES Technical features As long-lasting meters, they can be used for many applications, thanks to their small dimensions (male screwed connections), light weight and good measuring performances. The flow range has a minimum from 0,3 l/min to a maximum of 60 l/min, the viscosity of the fluid from 0,5 to 1,5 cp. The output signal is of open collector type (capacity 3÷15 Vdc/6 mA or lower). The feeding is 3÷15 Vcc. The maximum working temperature is + 80° C and the maximum pressure for fluid at T=20°C is 10 bars. The parts in contact with the fluid and the body of the meter are in ETFE, or polypropylene and resins, or noryl and resins (depending on the flowrange), the seals are made of FPM rubber or NBR rubber.