Kamstrup Multical 403 Heat Meter – Ultrasonic Heat Meters MID Class 2

Kamstrup Multical 403 Heat Meter

MID Class 2 Heat Meter

Kamstrup Multical 403 heat meter is a static heat meter, cooling meter or combined heating/cooling meter based on the ultrasonic principle.

The Kampstrup Multical 403 can be designated as a hybrid instrument and is MID approved Class 2.

The Multical 403 can be turned during installation, in very compact systems too, enabling optimal reading of the display at all times.

With a temperature measuring range of up to 130°C, the robust measuring flow sensor offers extremely long product longevity as it is designed with Kamstrup unique ultrasound technique.

The volume is measured using bi-directional ultrasonic technique based on the transit time method and the accumulated heat energy and/or cooling energy can be displayed in kWh, MWh or GJ, all in the form of seven significant digits and measuring unit.

Kamstrup Multical 403

Ultrasonic Heat Meter

Product Benefits

The Kamstrup Multical 403 is based on innovative ultrasonic technology, a deep understanding of the challenges faced by utilities and experience gained from many years designing and manufacturing top of the range heat and cooling meters.

The Multical 403 is suitable for use within many applications including houses and apartments to shopping centres and office buildings as the meter has a selection range from qp 0.6 to qp 15 m³/h.

The compact design means that the meter can easily fit all types of installations while still maintaining an optimal display angle even in narrow environments.

The inlet/outlet position and the heat meter can be configured on site meaning that one meter can be used for many installations resulting in low stock holding requirements and easier forward planning.

The low pressure loss, which is below 0.15 bar, means there is a lower need for pumping capacity which reduces the amount of electrical energy to the circulation pumps in the utility.

Kamstrup Multical 403 Heat Meter

MID Approved CLASS 2

The Measuring Instruments Directive (MID) is a European directive (2004/22/EC) that harmonises the requirements of 10 different measuring instrument types, including gas meters and heat meters. MID approved heat meters will have passed specific conformity assessment procedures and have MID markings which allow the instruments to be used in any EU member state.

Heat meters to be used for the Non-Domestic RHI in the UK must also comply with MID Class 2.

Kamstrup Heat Meters - MID Approved


Kamstrup Multical 403 Ultrasonic Heat Meter - MID Class 2, RHI Approved, Rounded Design

Kamstrup Multical 403 Ultrasonic Heat Meter – MID Class 2, RHI Approved, Rounded Design

Kamstrup Multical 403 Heat Meter

Product Specifications

Calculator Functions – Energy calculation by the heat meter is carried out on the basis of the formula stated in EN 1434-1:2007. This uses the international temperature scale issued in 1990 (ITS-90) and the pressure definition of 16 bar.

Kamstrup Multical 403 operates with many energy formulas, E1, E3, E8, E9, A1 and A2. All energy types are data logged and can be displayed according to configuration. This enables the Multical 403 to calculate heat and cooling energy in most applications.

Communication – The Kamstrup 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

The M-Bus module is powered through the M-Bus network and is thus independent of the meter’s internal supply. Two-way communication between M-Bus and energy meter is carried out via a digital isolator providing galvanic separation between M-Bus and meter

Mechanical Data

Environmental class – Fulfils EN 1434 class A and MID class E1

Protection classAmbient
Environmental class
CalculatorIP655…55 °CNon-condensingIndoors (closed position)
Flow sensor and temp. sensor pairIP68Condensing


Medium Temperatures

Kamstrup Heat meters 402-V/WKamstrup Cooling meters 402-TKamstrup Heat/cooling meters 402-TMedium in sensorStorage temperaturePressure stageWeight
2…130 °C2…130 °C2…130 °CWater  (district heating water as described in CEN TR 16911 and AGFW FW510)-25…60 °CPN16 and PN25From 0.9 to 8.6 kgs depending on flow sensor size


Heat Meter Construction

  • Flow sensor case – Hot dezincification proof brass (CW 602N)
  • Case, flange – Stainless steel, material no. 1.4308
  • O-rings – EPDM
  • Measuring tube – Thermoplastic, PES 30% GF
  • Reflectors – Thermoplastic, PES 30 % GF and stainless steel
  • Flow sensor cover & wall bracket – Thermoplastic, PC 10% GF with TPE (thermoplastic elastomer)
  • Cable – Silicone cable with inner Teflon insulation
Kamstrup Multical 403 Heat Meter Calculator Dimensions (Measurements in mm)

Kamstrup Multical 403 Heat Meter Calculator Dimensions (Measurements in mm)

Meters - Water, Heat & Gas Meters

T&D – Heat, Water & Gas Meters. Heat Meters (Ultrasonic & RHI MID Class Compliant), Water Meters (Mechanical, Rotary Piston, Turbine, Ultrasonic & Woltmann) & Gas Meters (Diaphragm, Turbine & Rotary) from Elster, Kamstrup and Itron.

➡ Did you know? T&D, the Metering Specialists, distribute Elster cold water meters.