Reading a meter without a visit
Smart metering — AMI, advanced metering infrastructure — uses NB-IoT or 4G so water, electricity, gas, and heat meters can do remote reading, prepay, alarms, and analysis. That replaces a person walking into the home. SimtoLink modules for this work are 4G / 5G / NB-IoT, industrial-grade, with UART, SPI, and I2C. The company supports 500+ enterprise customers and has connected more than 10 million meters.
Household meters, commercial meters, and the pipe between them
A battery meter in a flat, a commercial meter, a concentrator, and a point on the network do not report at the same rate. These are the usual AMI jobs, and the radio that tends to fit.
Commercial and industrial meters
A 4G module carries live load, maximum demand, power factor, and flow. That is what demand management, power-factor assessment, and energy analysis need.
Concentrators
A concentrator gathers many meters over 4G, for transformer-area management, line-loss analysis, and the reading schedule. Water, gas, and power companies use that to run the network more tightly.
Network monitoring and losses
Pressure and flow from a regulator station or a valve pit go up through the module. Balance, where a leak sits, and the gap between supply and sales all come from that, which is how network loss comes down.
Electricity meters and the collection system
Single-phase and three-phase meters report energy, voltage, and current over NB-IoT or 4G. That is electricity-use collection, a load curve, and remote fee control, which a grid AMI build expects.
Gas meters
Diaphragm and ultrasonic gas meters report use over NB-IoT. Prepay, CJ/T 188-2004, an alarm for unusual use, and a safety shutoff all ride that link.
What a meter in a pit asks of the module
- A battery measured in years: Household meters usually run on a battery. The module needs PSM and eDRX, standby current in the μA range, and life past 10 years.
- NB-IoT or 4G, by the meter: Household meters prefer NB-IoT to keep power down. Commercial meters and concentrators can use 4G when the report has to be timely and the pipe wider.
- Cold, damp, and a basement: Meters sit outdoors, in pits, and underground. They need −40°C to 85°C, and protection from moisture and condensation.
- The meter's own protocol: A metering MCU over DL/T 645, CJ/T 188, and Modbus.
- From a sample to volume: SimtoLink modules span 2G, 3G, 4G, and 5G, with documentation, an AT command set, an SDK, and production supply.
Which radio fits a household meter
How often it reports, how wide the pipe, the power budget, and cost do not line up the same way for a household meter and a concentrator. Meter type, reading interval, and battery life should decide the module. The rows below are the usual pairing for AMI.
| Job | Radio | What matters |
|---|---|---|
| Household meters (water, electricity, gas, heat) | NB-IoT | Very low power, daily or monthly reads, 10-year battery, DL/T 645, CJ/T 188 |
| Commercial and industrial meters, concentrators | 4G | Live load, demand, frequent reports, transformer-area management |
| Network monitoring, regulator stations | 4G | Live pressure and flow, leak analysis, the gap between supply and sales |
| Smart meter electricity data collection | NB-IoT 4G | NB-IoT on household meters, 4G on commercial meters, load curves |
How SimtoLink fits an AMI program
For meters, the modules are industrial designs that hold temperature and moisture, with technical support 7×24. NB-IoT is the recommendation for household meters, infrequent reads, and a battery. 4G is for commercial meters, concentrators, and network monitoring, where the report has to be timely and the pipe wider. An SDK a meter team can bring up quickly, work with mainstream chip vendors, and a named account manager come with the module.
A meter design is taken from the requirements and the radio choice, through a prototype on a small set of homes, and into volume. Documentation, the AT command set, an SDK, and sample code ship with the module, and supply is planned for a production run and for the years the meters stay in the field. Water, electricity, gas, and heat are all moving to remote reading, and the module line will follow that.
How a metering project usually moves
An AMI project usually moves in this order:
The choice turns on meter type (water, electricity, gas, or heat), how often it is read (daily, monthly, or live), battery life (a household meter wants PSM and eDRX, and 10 years), and the protocol (DL/T 645, CJ/T 188). Start small and check the read success rate, protocol fit, and the link into the platform. Household meters should use NB-IoT. Commercial meters and concentrators can use 4G.
Remote reading replaces a visit, cuts operating cost, and supports tiered tariffs, prepay, and loss control. SimtoLink has supplied modules to water, gas, and power companies, and to meter makers.