Multical 21

Kamstrup’s MULTICAL® 21 smart water meter now available with Sigfox communication.
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Countries adapted for RC1

Commercially available


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The first ever smart water meter with Sigfox communication

Kamstrup’s MULTICAL® 21, which has sold more than 1.5 million, is now available with integrated Sigfox communication that enables utilities to utilise an already established communication infrastructure rather than investing in a dedicated one. The meter delivers the same proven benefits as the company’s acclaimed existing smart meters while providing a competitive option for water utilities looking for a maintenance-free infrastructure. 

Accurate, durable and packed with intelligence 

Kamstrup’s Sigfox water meter provides all the same benefits as their popular existing water meter. These include pinpoint accuracy, longevity and low operational costs.  Even with daily values, the Sigfox water meter can also deliver up 16 years battery lifetime and just like the original, it pushes valuable alarms in the event of leaks, bursts, reverse flows and tampering attempts. Its hermetically closed design with IP-68 approved vacuum sealing and the fact that it has no moving parts make the meter resistant to both dust and damp as well as wear and tear.   

Please contact your local Kamstrup office for further information. You can find the relevant contact information at

Downloadable resources
  • Kamstrup_smart water meter with Sigfox communication.pdf

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Sigfox Ready

Class 0

End Product Certificate P_0050_5E1F_01



Actionable data

Consumption, max. or min. flow, temperature as well as alarms on leak, burst, dry, reverse and tamper.

Typical number of messages per duration



Commercially available
Production capabilities

+50,000 items

Warranty duration

2 year(s)

Technical Details

Product casing

Dimensions (in mm): 105 x 60 x 91.6

Weight: 370gr

IP Code: IP68

Recommended operating temperature: 0.1° to 30° C



Dedicated - Internal

Type: PCB printed

Protocols information: Communication to the log via optical eye


Battery life: 16 Years

Additional Information about the power supply

Lithium C-cell

Embedded Software

Flashable Firmware: No

External antenna

A connector for an external antenna is available


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