Nominal flow rate: Qn from 0,6 to 2,5. Protection degree: IP54. Calculator may be separated from the volumetric meter with a 30 cm small connecting cable, not extendable. Compact dimensions for installation in small places. Installation on the return pipe. Power supply: 3V lithium battery. Operation life: 6 years. Type of probes: Pt100. Volumetric unit temperature range: 5 ÷ 90°C.