Smart water meters NB-DW
NB-IoT Drinking Water Meter
A drinking water meter reporting over NB-IoT, 8 µA at rest.
- Communication
- NB-IoT
- Reporting interval
- Scheduled, configurable
- IP rating
- IP68
- Valve control
- No
Documents
Overview
Why buyers choose it
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8 µA at rest
Quiescent draw, not transmit power, is what sets a reporting meter's battery life.
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No gateway to install
NB-IoT rides the licensed cellular network, so scattered points need no backhaul of their own.
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−25 °C to 55 °C ambient
One specification covers an unheated hill installation and a summer plant room.
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BAND5 850 MHz
The low band penetrates buildings and chambers better than the higher NB-IoT bands.
In detail
Battery life on a reporting meter is decided almost entirely by what it draws when it is doing nothing. A meter transmits for a second or two a day and idles for the rest, so the quiescent current sets the replacement interval far more than the transmit power does.
This meter idles at 8 µA or less and transmits at 23 dBm on NB-IoT BAND5 at 850 MHz. NB-IoT is chosen here rather than a private radio because it uses the licensed cellular network: there is no gateway to install, no backhaul to arrange and no coverage survey, which for scattered drinking water points is usually the difference between a scheme that gets built and one that stays on paper.
It is specified for water between 0 and 40 °C and for ambient conditions from −25 °C to 55 °C at up to 95% relative humidity, which covers both an unheated hill installation and a plant room in a Dehradun summer.
Technical specifications
Metrological
| Register type | Electronic register with NB-IoT reporting |
|---|
Electrical
| Battery type | Lithium, 3.6 V DC |
|---|---|
| Valve control | No |
| Tamper detection | Yes |
Communication
| Communication | NB-IoT |
|---|---|
| Reporting interval | Scheduled, configurable |
| Data parameters transmitted | Totalised volume, battery status, signal strength, fault flags |
Environmental
| IP rating | IP68 |
|---|---|
| Temperature class | Water 0–40 °C; ambient −25 to 55 °C |
Approvals
| Standards | ISO 4064 |
|---|
Download centre
Everything you need to specify.
Documents for the NB-IoT Drinking Water Meter.
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Download PDF (Opens in a new tab)
Technical datasheet
Specifications and dimensions.
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