1. Advantages
Straight-Through Design:
Reduced Gas Loss: The straight-through configuration minimizes the turbulence and resistance that gas encounters as it flows through the meter. This reduces the amount of gas that might be lost due to inefficient flow paths, ensuring that more of the gas is accurately measured.
Enhanced Precision: By streamlining the flow, the U-GR3 ensures that the gas moves through the meter in a more consistent and predictable manner. This consistency is crucial for the ultrasonic sensors to accurately detect the flow rate, leading to more precise measurements.
Ultrasonic Sensor Technology:
High Sensitivity: The U-GR3 uses highly sensitive ultrasonic sensors that can detect even small changes in gas flow. This sensitivity is particularly important at low flow rates, which are common in residential settings like kitchens where gas appliances may operate intermittently or at low power.
Wide Measuring Range: The meter has an extended measuring range of 0.016 to 10 m³/h. This wide range ensures that the meter can accurately measure gas usage from small pilot lights to large stovetops or ovens, providing a comprehensive and accurate assessment of gas consumption.
Temperature and Pressure Compensation:
Automatic Compensation: The U-GR3 incorporates automatic temperature and pressure compensation. This means that the meter can adjust its measurements to account for variations in temperature and pressure, which can significantly affect the volume of gas. In a kitchen environment, where temperature and pressure can fluctuate due to cooking activities and ventilation, this feature ensures that the measurements remain accurate and reliable.
Minimal Moving Parts:
No Mechanical Wear: Unlike traditional diaphragm meters, the U-GR3 has no moving parts that can wear out over time. This reduces the potential for mechanical failures and ensures that the meter maintains its accuracy throughout its service life. The lack of moving parts also means less maintenance is required, making the meter more reliable in the long term.
Internal Shut-off Valve:
Control and Safety: The internal shut-off valve provides an additional layer of control and safety. It allows users or service providers to easily stop the gas flow when necessary, such as during maintenance or in case of an emergency. This feature enhances the overall safety and management of gas usage in a kitchen setting.
Advanced Data Management:
Real-Time Monitoring: The U-GR3 supports multiple communication protocols, including GPRS and LoRaWAN, enabling real-time data transmission to remote monitoring systems. This allows for continuous monitoring of gas usage, which can help identify and address any anomalies or inefficiencies in gas consumption patterns.
Data Storage: The meter also has data storage capabilities, which can store historical usage data. This data can be used for billing, usage analysis, and predictive maintenance, ensuring that the gas usage is managed efficiently and effectively.
2. Dimensions


| Parameters | Unit | G1.6 | G2.5 | G4.0 | G6.0 |
| Nominal Measured Flow Qnom | m³/h | 1.6 | 2.5 | 4.0 | 6.0 |
| Maximum Measured Flow Qmax | m³/h | 2.5 | 4.0 | 6.0 | 10.0 |
| MinimumMeasured Flow Qmin | m³/h | 0.016 | 0.025 | 0.040 | 0.060 |
| Lowest Flow Rate Qstart | m³/h | 0.004 | |||
| Error -Qmin≤Q<0,1Qmax -0,1Qmax≤Q≤Qmax |
% | ±3.0 ±1.5 |
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Maximum Working Pressure Pmax |
kPa | 15 | |||
| Pressure Loss at Qmax | Pa | ≤200 | ≤250 | ||
| Ambient Temperature tm | ℃ | -25 to+55 | |||
| Storage Temperature | ℃ | -30 to 60 | |||
| Power Supply | Li Battery | 10 Years Design Life 10 Years Metrological Battery |
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| In-and Outlet Pipe Screw | Inch | G3/4",G1" | |||
| Humidity | % | ≤95% | |||
| Protection Level | Class | IP65 | |||
| Overall Dimensions | mm | 236*97.4*95 | |||
| Medium | NG | ||||
| Mechanical Environment | Class | M1 | |||
| Electronical Environment | Class | E2 | |||
| Communication | GPRS/LoRaWAN | ||||
| Material of Meter Body | Steel | ||||
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