UGM-G4 Gas Meter Series

The UGM-G4 Smart Meter Gas is designed and manufactured to measure the volume of Natural Gas and Liquefied Petroleum Gas (LPG). The measurement technology is based on an innovative ultrasonic sensor which integrates also the temperature sensor for volume conversion and permits to obtain an high precision and performance. The gas meters satisfy the new generation of smart devices to fulfill all requirements of European and International standard MID-OIML. Quality guarantee Made in Italy.


 Main Features


  • ultrasonic flow sensor;
  • integrated temperature sensor;
  • integrated shut off valve;
  • high corrosion-resistance coated steel with coating composition of zinc in combination with aluminum, magnesium and silicon;
  • indoor and outdoor installation;

Technical Features


  • electronic circuit designed for severe environment areas;
  • integrated earthquake sensor for automatic shut off valve (optional);
  • custom application by integrated valve, prepayment and multi tariff management;
  • low losses and low flow measurement;

Local interfaceOptical port ZVEI compliant to standard IEC 1170 (EN62056-21)
Communication protocol in accordance with UNI/TS 11291 (DLMS/COSEM)
GSM Communication module (PP4)2G or 3G or 4G or fallback, depend of the model
(see the order code for variant)
RF Communication module (PM1)Modulo Radio 169/868MHz
500mW (27dBm)
WMBus mode N Communication protocol in accordance with UNI/TS 11291 (DLMS/COSEM)
LoRaWAN communication moduleRadio module 433/470/779/864/865/915/920/923MHz
100mW (20dBm)
Communication protocol LoRaWAN (DLMS/COSEM)
Communication protocolCommunication protocol in accordance with UNI/TS 11291 (DLMS/COSEM) DLMS Association Authentication
Algorithm: High Level Security with AES-128-GMAC (Galois Message Authentication Code)
Data messages Authentication/Encryption algorithm: AES-128-GCM (Galois/Counter Mode)
WIRED M-BUS communication moduleCommunication protocol Wired M-BUS EN13757-2/3
Estimated battery lifeMetrological battery: ≥15 years
Communication battery: ≥10 years
Mechanical environment classM2
Electromagnetic environment classE1
Resistance to high ambient temperaturesT (EN 14236)
Resistance to dust and waterIP55 (On request degree of protection IP68)
Resistance to impactIK08
Index enclosurePolycarbonate V0 UV resistant, RAL7040 - other colours on request
Metallic bodyHigh corrosion-resistance coated steel with coating composition of zinc in combination with aluminum, magnesium and silicon
ATEXZone 2 (II 3G Ex ic IIB T3 Gc X)
Gas TypeNatural gas, LPG
Gas group family2: H, L, E (EN 437)
3: P (EN 437)
Accuracy class (MID)Class 1.5
Lowest flow rate measurable (Qstart)0.003 m³/h
Minimum flow rate (Qmin)0.012 m³/h
Transitional flow rate (Qt)0.6 m³/h
Maximum flow rate (Qmax)6.0 m³/h (Qr Overload = 7.2 m³/h)
Measurement accuracyQmin to Qt → ±3.0%
Qt to Qmax → ±1.5%
Std temperature for gas volume+15 °C (Configurable)
Maximum pressure500 mbar
Load loss≤ 2 mbar
Gas temperature-25°C to +55°C
Ambient temperature-25°C to +55°C
Storage temperature-25°C to +60°C
Relative humidity0% to 95%)
Electrovalve (EN 16314)Integrated valve with status signal
Max leakage: 120 cc/h at Pin = 500 mbar
User interface (UNI/TS 11291.6)Display LCD icons and chars Visible area 73x21mm
Cubic Metres indications 8 digits (3 decimals)
2 push buttons
Order Code


ORDER CODE:                                                                                                                  UGM-G4 WCY BC DE FG H ZZZZZ

ORDER CODE:                                                                                                                  UGM-G4


A = meter size

  • 4 = G4



W = meter case

  • A = small (standard)
  • B = large

C = pitch pipe

  • 0 = 100 mm *
  • 1 = 110 mm (standard)
  • 2 = 152 mm *
  • 3 = 220 mm *
  • 4 = 250 mm

Y = connection pipe

  • 0 = 3/4” **
  • 1 = 1” **
  • 2 = 1” 1⁄4 (standard)
* With space adaptor, ** With connection adaptor  (These spare parts are not included)


0 = valve NOT present

1 = valve present (standard):

  • The standard model of UGM-G4 has a valve. The valve can be remote controlled and this feature has a lot of useful applications for a gas company: The gas company can shut down the valve with the remote control, in case that the customer doesn't pay the bills, change gas supplier or in presence of maintenance or  safety problem . The gas company can open the valve remotely if there is a new tenant in a building, managing his customer in pre-pay mode (the customer pays for an X amount of gas and the valve stays open for supply in proportion to the value of gas m3 that the customer bought)



The UGM-G4 comes in 8 different models, each characterized by a different, GSM module technology (BC is UGM order code for different GSM modules):

B=GSM module antenna:

0 = internal antenna (standard)

1 = external antenna

C=GSM module:

0 = no GSM Module  

1 = GSM/GPRS (2G)

  • GSM/GPRS (2G) module.
    GSM/GPRS (2G) is the oldest GSM technology and the most widespread.
    Except for some countries which no longer support it, 2G is immediately available; in the future will be replaced by NB-IoT.

2 = LTE Cat NB1 (NB-IoT) (4G)

  • LTE Cat NB1 (NB-IoT) (4G) module and it is designed for Europe, Asia and the Paci c region market. NB-IoT is a 3GPP Iot technology very promising. 3GPP Iot technology focuses speci cally on in- door coverage, low cost, long battery life, and high connection density, reaching deep within buildings and supporting large numbers of units.
  • NB-IoT provides advantages in e cient battery operation and improved maximum coupling loss of +23 dB compared to 2G or 3G, therefore enabling underground coverage. In the near future it is expected to be widely available.

3 = LTE Cat M1 (US) (4G)

  • LTE Cat M1 (US) (4G) module and it is designed for US market.
    LTE Cat M1 is also a 3GPP Iot technology, and like NB-IoT focuses speci cally on indoor coverage, low cost, long battery life, and high connection density, reaching deep within buildings and supporting large numbers of units. Since LTE Cat M1 technology is much closer to standard LTE network deployments, it enables applications that need more bandwidth and latency similar to higher speed LTE categories.
    LTE Cat M1 also includes extensive power saving modes and better coverage as compared to 2G and 3G.

4 = LTE Cat M1/NB1 (Combo 4G, fallback 2G)

  • It uses 2G connectivity to guarantee broad geographic coverage: UGM-4 can activate on existing 2G networks and still leverage the bene ts of LTE Cat M1 and NB-IoT technology once 4G becomes available. It is the perfect solution for a migration path for existing GPRS service to 4G.


  • UMTS/HSPA (3G).
    3G technology is another technology available in the market and in near future will probably be replaced by NB-IoT. This model is specific for Europe, Middle East, Africa and Asia Pacific market.

6 = UMTS/HSPA (3G) North America

  • UMTS/HSPA (3G) but it is designed for North America market.

7 = UMTS/HSPA (3G) Brazil

  • UMTS/HSPA (3G) but it is specific for Brazilian market. Today 3G technology is the most widespread technology in Brazil, instead 4G is not very spread.


We offer differents models based on different GSM module technologies because our mission is to supply GAS market needs worldwide and offer a product adaptable to any market requirement.



The UGM-G4 comes in 3 different variants for RF module:

00 = no RF module

01 = 169MHz Wireless M-BUS

  • Wireless M-BUS or Wireless Meter-Bus is the European standard (EN 13757-4) that specifies the communication between utility meters and data loggers, concentrators or smart meter gateways. Wireless M-BUS it is widely accepted in Europe for smart metering or Advanced Metering Infrastructure (AMI) applications. The 169 MHz band is licensed as a free band in Europe and provide better propagation for radio waves compared to 2.4GHz. Operating with a license-free band has low costs for an utility company and allows radio wireless waves to reach difficult areas such as underground meters or locations in buildings that have several walls and obstructions. 169 MHz band has narrow band solution that have an higher link budget and provide longer range solutions than at 868MHz: it is adapted to very large buildings monitoring applications (industrial sites, schools, exc.)

02 = 868MHz Wireless M-BUS

  • Wireless M-BUS was originally created to operate only in 868 MHz band (another license-free band in Europe) which gives a good trade-off between RF range and antenna size. 868 MHz has a lower link budget compared to 169MHz: it is suitable to small buildings monitoring applications. Normally this protocol is for one-way transmission. In case of bi-directional is very energy expensive. The UGM with this option can transmit only.

03 =  LoRa EU868

04 =  LoRa US915

05 =  LoRa CN779

06 =  LoRa EU433

07 =  LoRa AU915

08 =  LoRa CN470

09 =  LoRa AS923

10 =  LoRa KR920

11 =  LoRa IN865

12 =  LoRa RU864



The UGM-G4 comes in 3 different expansion board models:

00 = no expansion board (standard):

  • The standard UGM-4 has not a expansion board

01 = NFC:

  • FC, Near Field Communication, is a technology that enables two electronic devices to establish wireless communication. NFC technology allows gas meter interact with IoT devices such as smartphones or tablets. With NFC technologies an utility company can manage a prepaid service for his customers: for example a customer can purchase credit and transfer it by smartphone to the meter.When the credit is empty, the customer gets a notification in the APP for buying credit. NFC improves the supply chain (supports track and trace functions), consumes low energy, allows a customized access (customers can view only data, utility company can manage readings or customer communications) and help maintenance (utility company can send usage tips and service phone numbers to customer while maintenance personnel can view log errors or load firmware updates).

02 = RF 2.4GHz ZigBee

  • ZigBee, an IEEE 802.15.4-based specification for a suite of high-level communication protocols used to create personal area networks, is a low-power, low data rate and close proximity wireless ad hoc network. The ZigBee specification was created for a simpler and less expensive technology than WPANs (Wireless Persona Area Network) technologies such as Bluetooth or Wi-Fi. Due to his low power consumption his transmission is limited to 10-100 meters line-of-sight but ZigBee devices are capable of transmit data over long distances bypassing data through a mesh work of intermediate devices.In a lot of county worldwide ZigBee uses 2.4 GHz for commercial use. ZigBee is used in low data applications that require long battery life and secure networking.

03 = Earthquake Sensor

  • UGM-G4 can have an earthquake sensor, a sensor that can detect the seismic waves of an earthquake and if is detected shut down automatically and immediately the valve. Earthquake sensor is required in gas meter in a lot of countries worldwide: fires or explosions due to gas line break can be more damaging than the actual earthquake itself.





The UGM-G4 comes in 2 different  codes based on different IP degree:

0 = IP55 (standard):

  • UGM standard is IP55 degree. The International Protecting marking define the first and second digit by the follow protection degree for solid particle protection and liquid ingress protection. IP5x  means that the enclosure of UGM-G4 provides protection against dust: the ingress of dust in the enclosure is not entirely prevented but it doesn't enter in sufficient quantity to interfere with the satisfactory operation of the equipment.  IPx5 means also that the enclosure of UGM-G4 has a protection against water jets: water projected by a nozzle (6.33 mm) against enclosure from any direction doesn't have harmful effects on UGM.

1 = IP68:

  • IP6x means that the enclosure is dust tight: in the enclosure there is no ingress at all of dust and there is a complete protection against dust contact. IPx8 means also that UGM can be immersed permanently in water up to 1 meter of depth: the immersion has not harmful effects on UGM.



00000= no variant

BANDS (MHz):                                                                                                                                                                                                  C

BANDS (MHz):                                                                                                                                                                                                 


C =

  • 1 = 850, 900, 1800, 1900
  • 2 =B8(900), B20(800)
  • 3 =B2(1900), B4(AWS1700), B12(700), B13(700)
  • 4 =B3(1800), B5(850), B8(900), B20(800), B28(700)
  • 5 = V(850), II(1900), I(2100)
  • 6 = VIII(900), II(1900), I(2100)
  • 7 = V(850), VIII(900), III(1800), II(1900), I(2100)
ModelW mmC mmH mmM mmD mmG mmConnections
Small194100 *
140115121323/4" **
Large338152 *
220 *
167142120333/4" **
1" **
WeightSmall: 1.61 kg
Large: 2.53 kg
* With space adaptor, ** With connection adaptor
(These spare parts are not included)