HM is the smart meter by Pietro Fiorentini which combines the new generation electronic features with a diaphragm metering unit. The mechanical register is replaced by an electronic totalizer equipped with a data transmission device and a remote firmware upgrade function.

This device combines a temperature and pressure sensor which compensate for the measured gas volume. It is mainly used in low pressure natural gas distribution networks.


  • Body: zinc-coated pressed steel plate
  • Precision class: 1.5
  • Working temperature: from -25 °C to +55 °C
  • Connections: 1” 1/4 ISO 228
  • Minimum flow rate: 0.1 m3/h HM-10, 0.16 m3/h HM-16, 0.25 m3/h HM-25
  • Maximum flow rate: 16 m3/h HM-10, 25 m3/h HM-16, 40 m3/h HM-25
  • Remote communication interfaces: GSM/GPRS
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