Measuring heat without walking the riser
A heat meter uses NB-IoT or 4G for remote reading of heating energy, metering by household, heat-bill settlement, and heat-balance adjustment. District heating in the north and room-level heating in the south both need that measurement if the bill is going to follow the heat. SimtoLink modules for this work cover 4G, 5G, NB-IoT, and LTE Cat.1, with an industrial design and UART, SPI, and I2C. The company supports 500+ enterprise customers and has connected more than 10 million heat meters.
Where a heat meter reports from
A household meter, a building meter, a substation, and a floor-heating manifold do not speak on the same schedule. The notes below are the usual jobs, and the radio that tends to fit.
Household meters
An ultrasonic or mechanical heat meter reports heat delivered and supply and return temperatures over NB-IoT on a small power budget, and it can carry billing by heat and remote prepaid credit.
The building meter
The building meter reports over 4G so a heating company can run a heat-balance analysis, tune the system, and cut complaints. That is building-level energy management.
Heat substations
Temperature, pressure, and flow on the primary network and the secondary network go up through the module, so a substation can run unattended and still be adjusted from the office.
Floor heating, metered by home
The manifold thermostat and the heat meter work together, so room-by-room control and heat on demand share one link. Comfort goes up and the wasted heat goes down.
Industrial parks and commercial complexes
Heat metering for an industrial park or a commercial complex joins the energy platform through the module, covering steam, hot water, and how the heat bill is split.
The heating dispatch desk
Many meters land at the dispatch center, which is the feed for heat balance, an energy total, and a fault warning. That is what a smarter heating network runs on.
What a heat meter asks of the module
- More than one radio: Household meters usually sit on NB-IoT, where power matters. A building meter can use 4G when the reading has to be live.
- Low power and a small board: A household meter is often on a battery. Standby current has to stay low. PSM and eDRX are what stretch that life.
- Temperature in a pipe shaft: Meters sit in a pipe shaft. They need −40°C to 85°C, and they have to take heat and humidity.
- The flow meter's own protocol: The module talks to the flow meter and the temperature sensors over CJ/T 128, the heat-meter communication protocol.
- From a sample meter to a heating-season lot: The range runs 2G through 5G, with documentation, an SDK, and production supply for heat-meter makers.
Which radio fits a heat meter
How often a meter speaks, how it is powered, and whether it sits in a damp shaft do not line up the same way for a home and a substation. Meter type, battery life, and the shaft should decide the module. The rows below are where heating projects usually start.
| Job | Radio | Why that radio |
|---|---|---|
| Household meters, metering by home | NB-IoT | Very low power, a battery past 10 years, a lower bill |
| Building meters | 4G | Heat-balance analysis, live data, many meters on one link |
| Substation monitoring | 4G | Primary and secondary network readings, unattended operation |
| Industrial parks and complexes | 4G | Steam and hot water, a platform link, a link that holds |
How SimtoLink fits a heating program
For heat meters, the modules are industrial designs that hold temperature and shock, with technical support around the clock. NB-IoT is the recommendation for household meters and other infrequent reads. 4G is for building meters and for substations.
A meter maker gets the AT command set, the SDK, and sample code with the radio, and one account stays from the requirements note through a prototype and a production lot. As billing by heat spreads, demand for connected heat meters keeps growing, and supply is meant to continue after the first heating season.
How a heating program usually moves
Heating companies usually move in this order:
The choice turns on meter type (a household meter has to be frugal, a building meter has to be live), battery life (a household meter is on a battery), and the pipe shaft (wide temperature and moisture). Start with a small pilot and check read success through a heating season, and whether the platform link stays stable. Household meters are usually better on NB-IoT. Building meters and substations can use 4G.
Remote reading is what makes billing by heat possible, and that is what pushes a heating network to waste less. SimtoLink has supplied modules to heating companies and meter makers, on CJ/T 128 and the related standards.