NB-IoT Membrane Gas Meter is a prepayment gas meter based on the operator's narrowband cellular Internet of Things, which is based on the diaphragm type gas meter, equipped with electronic controller and NB communication module.
u Low power consumption metering and NB-IoT communication technology
u Gas safety detection and anti-theft technology
u Meter-end step gas price prepaid core algorithm
u Dedicated IoT card for data communication via NB-IoT (narrowband Internet of Things)
u Three working modes: timed upload, manual upload and abnormal event upload. The upload features a staggering peak mechanism.
u On-line parameter configuration function and local infrared wireless communication interface.
u Has pre-paid function to realize remote recharge payment.
u Abnormality alarm management functions, including gas abnormity alarm, electric quantity abnormity alarm and communication abnormity alarm.
u Power supply by 4 AA alkaline batteries and built-in clock lithium battery.
u Status information such as accumulated gas volume, remaining amount, unit gas price, valve status and battery level are available at the meter end.
u Support gas meter hardware program update via a remote online form.
u Interface with externally connected gas leakage alarm apparatus. Linkage with the alarm apparatus is available.
u Mobile alarm function. When the meter is maliciously removed or damaged, the valve will close and alarm.
Key Technical Indexes
Level of accuracy
Limit of intrinsic error
When Qmin≤Q＜0.1Qmax, ±3
When 0.1Qmax≤Q≤Qmax, ±1.5
Maximum cumulative amount
Maximum working pressure
Loss of total pressure
No leakage under 1.5 times of maximum working pressure
Explosion proof criteria
EXib IIBT3 Gb
Various types of gas, air, non-corrosive gases
Power supply mode
4 pieces of AA alkaline batteries, built-in lithium battery
Service life ≥ 12 months, easy to replace
Built-in clock lithium battery
Service life ≥10 years
Mechanical display and liquid crystal display
Support remote valve control, can achieve different authority valve control, including ordinary valve closing and authority valve closing.
Continuous switching times shall not be less than 10000 times
Valve closing time
Daily meter reading success rate
One-time meter reading success rate
Data reading accuracy