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Kamstrup MULTICAL® 403

Heating & Cooling Meters

Kamstrup MULTICAL® 403

The front runner in energy metering

MULTICAL® 403 is a static heat meter, cooling meter or combined heat/cooling meter based on the ultrasonic principle. The meter is intended for energy measurement in almost all types of thermal installations where water is used as the energy-conveying medium.

Kamstrup 403


MULTICAL® 403 consists of a calculator, a flow sensor, and two temperature sensors. MULTICAL® 403 has been developed for the measurement of energy consumption in flats, single-family and multifamily houses, housing associations, blocks of flats, and small industry. The meter is simple to install, and it has a temperature range of 2 …180 ÆC and a meter programme with nominal flow from qp 0.6 mÑ/h to 15 mÑ/h.

Due to its robust design and high quality, MULTICAL® 403 is practically maintenance-free, and its simple setup makes it easy to configure via the meter’s front keys.

MULTICAL® 403 has been optimised compared to earlier generations. The total dynamic range has been increased to 1600:1 from saturation to start-up and the meter has an approved dynamic range of 250:1. It is thereby secured that every conceivable consumption is measured with the same well-known Kamstrup precision.

The meter can be powered by mains or battery supply as required. You can choose between a small battery without transport restrictions or a more powerful battery with 16 year’ lifetime. No matter which solution you choose, the power consumption of MULTICAL® 403 is low.

Volume is measured using a bidirectional ultrasonic technique based on the transit time method, a proven long-term stable and accurate measuring principle.

Accumulated heat energy and/or cooling energy can be displayed in kWh, MWh, or GJ, all in the form of seven or eight significant digits. The display has been specially designed with a view to obtaining longevity.

A wide range of parameters are configurable via the front keys of MULTICAL® 403: Flow sensor position in inlet or outlet, energy unit, primary M-Bus address, radio on/off, target dates, etc. Configuration can be carried out on-site, thus contributing to a reduction of stocks and installation time.

MULTICAL® 403 is available with communication modules for Wireless M-Bus, M-Bus, and RS232. The modules are available with either pulse inputs or pulse outputs. In addition to reading current values, the programmable data loggers of MULTICAL® 403 can be read via M-Bus.


  • Fully programmable data logger with minute logger
  • Configurable M-Bus modules with logger reading
  • On-site configuration via front keys
  • Highly flexible modular design
  • Pulse inputs and pulse outputs
  • Real-time clock backup
  • 16 years’ battery lifetime at a reading interval of as low as 10 seconds
  • IP68 flow sensor
  • 7- or 8-digit display resolution

Technical Data

Approval (heat meter) DK-0200-MI004-037
Approval (cooling meter) TS 27.02 009
EN 1434 designationEnvironmental class A and C
Protection class (calculator)IP54
Protection class (flow sensor)IP68
DisplayLCD 7 or 8 digits, digit height 8.2 mm
Energy UnitsMWh – kWh – GJ
Heat Meter (temperature range)θ: 2 °C…180 °C[°C]
Heat Meter (differential range)ΔΘ: 3 K…178 K[K]
Cooling Meter (temperature range)θ: 2 °C…180 °C[°C]
Cooling Meter (differential range)ΔΘ: 3 K…178 K[K]

Flow sensor with G¾ and G1 thread connection

Nominal flow qp
LAB1B2B3Approx. weight [kg] *
0.6 + 1.5
0.6 + 1.5G1B190223838781.1

* Weight of calculator, flow sensor, 3 m sensor pair excl. packing

Flow sensor with G5/4 and G2 threaded connection

Nominal flow qp
LMH2AB1B2H1Approx. weight [kg] *

* Weight of calculator, flow sensor, 3 m sensor pair excl. packing

Flow sensor with DN25, DN40 and DN50 flange connection

Nominal flow qp
Nom. diameter
Approx. weight [kg] *

* Weight of calculator, flow sensor, 3 m sensor pair excl. packing

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