I. What the Sector Covers
1.1 Scale and what is included
Urban gas users number more than 300 million, and the pipe network is longer than 500,000 kilometers. Gas safety is part of how a city runs. Smart gas uses IoT and big data for remote meter reading, leak monitoring, pipe inspection, and emergency dispatch. Accidents still happen, and policy is pushing smarter meters, leak alarms, and monitoring on the pipes.
The Urban Gas Management Regulations and the Work Safety Law set the safety bar. The Guiding Opinions on Promoting the Orderly and Healthy Development of the Internet of Things push IoT into livelihood devices, including gas meters. NB-IoT is the usual link for a smart gas meter: low power, wide coverage, and many devices on one network.
1.2 Rules and standards
The Gas Engineering Project Code requires a leak alarm in a new home. Many cities are replacing meters, and the share of NB-IoT meters keeps rising. The national standard Gas Meters sets the communication interface and the data format. Leak and pressure monitoring on the pipe have to be explosion-proof and otherwise safe.
II. Where a Doorstep Reading Fails
2.1 A reader who cannot get in
A person reading meters is expensive, slow, easy to get wrong, and often cannot enter the home. An NB-IoT meter reports every day, supports prepayment and abnormal-use checks, and cuts the cost of the round.
2.2 A leak, a bad appliance, an old hose
Leaks, misuse of appliances, and aged rubber hose start accidents. A leak alarm tied to a shut-off valve finds the problem and closes the gas. The alarm also goes out over the network, so the response starts sooner.
2.3 A long pipe and a late find
The network is spread out. Leaks and third-party damage have to be seen quickly. Pressure and flow points catch an abnormal reading. An inspector's position and route can be traced. Dispatch needs the pipe state and where the crews and gear are, at the moment.
III. Where the Link Is Used
3.1 The meter
An NB-IoT gas meter reports the reading every day. It supports remote reading, prepayment, and checks for odd use or a long stretch with no use. Nobody has to come inside.
3.2 The alarm and the valve
A leak alarm reads methane. Over the threshold it sounds and lights, and a solenoid shut-off valve closes the supply. The same alarm goes to the user and the gas company over NB-IoT or 4G.
3.3 The pipe and the round
Pressure, flow, and temperature sensors sit on key nodes and alarm when a reading leaves the range. Inspectors send records and hazard photos from a handheld or a vehicle unit. The route can be traced, and the work order stays on the system.
IV. Numbers and Where It Has Been Used
The numbers: an NB-IoT gas meter reports 1–2 times a day, about 100–500 bytes a time, on a battery that lasts 6–10 years. A leak alarm reads methane from 0–100% LEL (lower explosive limit), usually alarms at 10% LEL, and responds in under 30 seconds. A pipe pressure sensor covers 0–0.4 MPa or higher, at ±0.5% FS. Meters and alarms have to be explosion-proof and resistant to gas corrosion.
Where it has been used: one gas company replaced about 800,000 meters with NB-IoT units over three years. Remote-reading coverage went from 30% to 95%, and the labor cost of reading fell by about 70%. One city required restaurants to fit a leak alarm and a shut-off valve on NB-IoT. Alarms go to the user and the company, and more than 200 leak incidents were handled in 2023.
V. Who Builds It, and Which Rules Apply
The chain runs from meter and alarm makers (Goldcard, Viewshine, and Pioneer) through gas companies to users. Gas Meters, GB/T 6968, sets the communication interface. Gas Engineering Project Code, GB 55009, requires a leak alarm in a new home. An NB-IoT meter has to pass the carrier's device-admission test for power and signal.
VI. Terms
- NB-IoT: narrowband IoT, a low-power wide-area link, the usual choice for a gas meter.
- Solenoid shut-off valve: a valve that closes the gas when a leak is detected.
- SCADA: supervisory control and data acquisition, used to watch the pipe network from one place.
VII. Where It Is Heading
Meters go smart across the stock, replacements and new installs alike. Leak alarms spread into restaurants and homes because policy requires them. The pipe becomes a model, GIS plus IoT as a digital twin. City safety takes gas into the urban operations platform.
VIII. Summary
Smart gas ties meters, leak alarms, and pipe sensors so reading, warning, and pipe watch sit on one link. NB-IoT is the usual choice where the device has to last for years on a battery.
SimtoLink supplies NB-IoT and 4G SIM cards and communication modules for this work, including low-power reports on a long cycle, so a gas company can keep meters and alarms online.