Digital gas meter BBUGM-S

ultrasonicIoT

Product Overview
The BBUGM-S is a smart ultrasonic gas meter using transit-time measurement in a closed pipeline. It displays instantaneous flow and accumulated volume. The fully electronic design eliminates mechanical wear and integrates valve control, data storage and wireless communication.

Applications and Supported Gases
Available in G1.6, G2.5 and G4 versions for residential and commercial measurement of natural gas, LPG, air, nitrogen and other inert gases. Optional communication: LoRa or NB‑IoT. Includes a passive-switch input for gas-alarm linkage. Not intended for hydrogen, oxygen, acetylene, hydrogen sulfide or toxic/corrosive gases.

Key Features

• Transit-time ultrasonic measurement in closed pipeline
• Model versions: G1.6, G2.5, G4
• Accuracy Class 1.5 (±3% at low flow, ±1.5% from qt to qmax)
• Integrated valve control and prepaid/stepped-price display
• Optional LoRa or NB‑IoT wireless communication
• Gas-leak alarm linkage and passive-switch input
• Built-in diagnostics and abnormal-event records
• Battery powered (3.6 V ER lithium) with optional 9 VDC external input
• Explosion-proof rating: Ex ib IIB T3 Gb; Protection: IP65

Flow Specifications (table)
Version | Permanent flow | Flow range
G1.6 | 1.6 m³/h | 0.016 to 2.5 m³/h
G2.5 | 2.5 m³/h | 0.025 to 4 m³/h
G4 | 4 m³/h | 0.04 to 6 m³/h

Technical Specifications (table)
Parameter | Specification
Measured gases | Natural gas, LPG, air, nitrogen and other inert gases
Accuracy class | Class 1.5
Indication error, qmin ≤ q < qt | ±3%
Indication error, qt ≤ q ≤ qmax | ±1.5%
Maximum working pressure | 10 kPa
Operating temperature | -20 to +50 °C
Storage temperature | -25 to +55 °C
Displayed information | Instantaneous flow, accumulated volume, battery status, valve status, remaining balance, purchase amount, unit price, accumulated consumption
Metering battery | 3.6 V ER lithium (design life 10 years)
Communication/valve battery | Four AA 1.5 V batteries
External power | Optional 9 VDC input
Wireless communication | LoRa or NB‑IoT
Other interfaces | Pulse output, infrared (CJ/T 188 at 1200 bps), gas-alarm input
Pulse equivalent | 10 L/P
Protection rating | IP65
Explosion-proof rating | Ex ib IIB T3 Gb

Measurable and Restricted Gases
Measures: natural gas, LPG, air, nitrogen and other inert gases. Restricted: hydrogen, oxygen, acetylene, hydrogen sulfide and toxic or corrosive gases.

Typical Applications

• Residential natural-gas metering
• Commercial gas metering
• LPG consumption measurement
• Prepaid gas management
• Remote meter reading and valve control
• Gas-leak alarm linkage

Specifications summary

• Model versions: G1.6, G2.5, G4
• Measurement principle: Transit-time ultrasonic in closed pipeline
• Accuracy: Class 1.5 (±3% at low flow, ±1.5% from qt to qmax)
• Max working pressure: 10 kPa
• Operating temperature: -20 to +50 °C; Storage: -25 to +55 °C
• Display: instantaneous flow, accumulated volume, battery/valve status, balance and pricing information
• Batteries: metering — 3.6 V ER lithium (10 years design life); communication/valve — 4 × AA 1.5 V
• External power: optional 9 VDC input
• Wireless: LoRa or NB‑IoT; Interfaces: pulse, infrared (CJ/T 188), gas-alarm input
• Pulse equivalent: 10 L/P; Protection: IP65; Explosion-proof: Ex ib IIB T3 Gb