Overview
The Viewshine U-GR3 gas meter in bedroom is designed for cluster installation in narrow spaces or instrument boxes, integrating built-in valves and IoT communication for real-time monitoring. Its extended measurement range of 0.016-10m ³/h is suitable for residential and commercial gas demand, while the high-sensitivity ultrasonic sensor ensures accuracy even at minimum flow rates. The fully electronic design eliminates mechanical components and reduces the risk of wear and tear. Once abnormal situations such as leaks, pressure fluctuations, or tampering are detected, the instrument will immediately activate the valve to close and send an alarm through the IoT platform to protect the gas system in a precise and responsive manner.
Main Features
1. Built in emergency valve system
The U-GR3 is equipped with an intelligent automatic shut-off valve that immediately blocks airflow upon detecting leaks, abnormal pressure, or tampering. This fault safety mechanism minimizes risks and ensures compliance with industrial safety protocols.
2. Anti tampering instrument disassembly alarm
If unauthorized removal or physical interference is detected, the integrated anti-theft system will trigger real-time alerts through the IoT platform, providing 24/7 asset protection and regulatory traceability.
3. Comprehensive gas monitoring
This instrument utilizes ultrasonic sensing technology to provide real-time consumption tracking and fine visualization of usage patterns, enabling users to optimize energy efficiency and budget planning.
4. Wide dynamic measurement range (0.016-10m ³/h)
It is designed for multifunctionality and seamlessly adapts to the constantly changing needs of residential, commercial, and light industrial applications, maintaining accuracy from minimum flow to peak flow.
5. Military grade measurement accuracy
Ultrasonic sensors and fully electronic measurements eliminate mechanical drift, achieving an accuracy of ± 0.5% even under extreme temperature/pressure changes, and have been validated by the OIML R137 standard.
6. Long term data storage and analysis
The built-in memory can archive over 12 months of consumption history, and seamlessly integrates with the cloud platform to support trend analysis, billing auditing, and predictive maintenance.
7. Automatic temperature and pressure compensation
Advanced algorithms dynamically adjust readings based on environmental conditions to ensure compliance with EN14236 standards and eliminate manual calibration errors
General Description

Technical Parameters
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Type |
U-GR3 |
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Range and Capacities |
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Model |
G1.6 |
G2.5 |
G4 |
G6 |
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Qmin |
0.016 |
0.025 |
0.04 |
0.06 |
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Qn |
1.6 |
2.5 |
4.0 |
6.0 |
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Qmax |
2.5 |
4.0 |
6.0 |
10.0 |
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Electrical |
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Battery |
Two Li-batteries |
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Battery Life |
8-10 years |
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Battery Replaceable |
Communication Battery can be Replaced |
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Metrological |
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Accuracy |
±3% in range Qmin≤Q<0.1Qmax |
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±1.5% in range 0.1Qmax≤Q≤Qmax |
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Pressure Loss |
﹤200Pa |
﹤250Pa |
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Protection Class |
IP65 |
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Medium Temperature |
-25~55℃ |
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Storage Temperature |
-30~60℃ |
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Pressure Range |
≤15kpa |
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Body Material |
Steel |
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Nut Connection |
G1'' |
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Dimension |
236*97.4*95mm |
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Communication |
GPRS |
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Dimension

Why Choose Us
1. Professional knowledge in industry leadership and standard setting
As a pioneer in ultrasonic measurement technology, Viewshine has contributed to the development of China's national measurement standards, utilizing decades of professional experience to provide globally trusted solutions for customers.
2. Strict quality assurance
Our dedicated R&D and quality control teams implement strict quality protocols at every production stage to ensure that products consistently exceed industry benchmarks and meet your precise specifications.
3.360 ° Customer centered Support
We prioritize seamless user experience and have a responsive after-sales team that can quickly solve problems, from technical troubleshooting to operational guidance, ensuring uninterrupted service and long-term satisfaction.
4. High cost-effective direct manufacturing
As a factory distributor, we eliminate the markup of middlemen while maintaining cutting-edge innovation, providing unparalleled value without compromising performance or reliability.
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