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Product at a glance

Smart, flexible and reliable

Secure Meters has developed Liberty EG4v 11/15 smart gas meter to meet UK smart metering requirements. Liberty EG4v 11/15 is based on a proven G4 measurement unit with electronic index and isolation valve. The meter uses ZigBee. radio to provide link with head end system and in home display (IHD) via the smart meter communications hub. The meter is capable of remote firmware upgrade after installation to allow features and functionality to be changed. EG4v supports both credit and Pay As You Go (PAYG) modes of operation. The meter can be remotely switched between modes through its operational life.


  • Smart gas meter with both credit and PAYG modes for
    • domestic customers
    • small commercial customers


  • Simple installation, registration and pairing process
  • Remotely switchable between credit and PAYG modes
  • Assists consumers in reducing energy consumption


  • Meets requirements of SMETS1
  • Integrated isolation valve
  • Slab tariffs and complex/time of use tariffs
  • Logging of energy data usage profile, billing data, events including tamper detection
  • Credit and PAYG modes (meter maintains account and tariffs)
  • Keypad for local entry of PAYG UTRN if HAN not available
  • Remote firmware upgrade
  • Option to close valve on detection of tamper


Connection type UK-sized bosses at 6″ (152.4 mm) centres
Meter rating G4 Qmin 0.04m3/hr Cmax 6.0m3/hr
Working pressure Up to 0.2 bar
Resolution 0.0012m3
Gas types Natural, manufactured or liquid petroleum gas (LPG)
Standards MID Class1.5 EN 1359
ATEX Ex II 3 G Ex is IIA T6
Dimensions (W x H x D) 235 mm x 268 mm x 175 mm (Liberty EG4 v 10/11)
227 mm x 262 mm x 188 mm (Liberty EG4v 15)
Weight 3.3 kg (Liberty EG4v 10/11), 2.9 kg (Liberty EG4v 15)
Enclosure Electronic Index – flame retardant polycarbonate Gas meter – powder coated steel case
Battery Field-replaceable battery
Isolation value Rated for 4000 cycles
Ingress protection IP54 (EN60529)
Temperature -10°C to +40°C (operating), -25°C to +55eC (storage)
Humidity 95% non-condensing
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