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Product at a glance

Static heat and cooling meter

The Calorio 150 a static heat or cooling meter according to standard EN1434 class 2 based on the fluid oscillation principle, covering a wide range of flows for all applications in district heating and cooling or building automation. The fluid oscillation principle guarantees a high stability and repeatability for a reliable and precise measurement of flow and thermal energy. The heating and cooling meter consists of the fluid oscillator flow sensor, the integrator battery or mains powered, and a pair of temperature sensors. Consumption values can easily be read over the display or various data interfaces like optical probe, M-Bus, LON, BACnet, Modbus, GSM and so on. The Calorio 150 integrator is suitable for connecting Pt 500 or Pt 100 temperature sensor pairs with 2 or 4-conducting wire techniques. Volume inputs can be combined with mechanical, magnetic-inductive, ultrasonic or fluidic oscillators flow sensors with a maximum nominal flow rate of 10'000 m3/h. The factor of the pulse value is defined in the flow meter unit. The volume input value is defined when the unit is produced. The pulse value can be modified one single time by means of the push button. The additional pulse inputs allow the connection of hot water, cold water, gas, oil and electricity meters.


  • Commercial and domestic heat metering
  • District heating and cooling schemes
  • Home automation
  • Energy center heat metering
  • Whole building heat metering – Riser, lateral or community


  • Interchangeable measuring head
  • Complete range of pipes 1 – 1500 m3/h
  • Purchase and maintenance costs are reasonable compared with other static flow sensors
  • Corrosion resistant materials
  • Protection degree of flow sensor IP68
  • Threaded and flange fittings
  • No straight section necessary up to DN40
  • No moving parts, therefore no wear
  • Not sensitive to dirt
  • Stable
  • For horizontal, upstream and downstream pipes, independent mounting position
  • Common spare parts 1qp 1 – 1500 m3/h
  • Dynamic range:
    • 1 : 100 at qp 1 – 25 m3/h
    • 1 : 50 at qp 40 – 400 m3/h
    • 1 : 25 at qp 800 – 1500 m3/h
  • Direct pick-up of voltage pulses without reflectors
  • Measurement independent of medium
  • Long-term, stable, accurate and reliable measurement, even with poor water quality


  • Mains or battery powered
  • Exchangeable integrator module, the wiring base with the connections remain in place
  • Communication options and functions can be equipped later and without compromising verification of the integrator
  • EEPROM for the communication setup is pre-installed in the base part
  • Programming of the specific installation data over two pushbuttons
  • Fast support via the Internet
  • Self-recognition of options and voltage supply
  • M-Bus according to EN1434 (300 – 38'400 baud) variable and fix data structure
  • Two or four wire connection techniques
  • Up to 4 analogue outputs, M-Bus, two open collector outputs and two pulse inputs can be simultaneously used
  • Clear and customer-friendly user concept
  • Accuracy better than required by EN 1434


Absolute temperature range -20…200°C
Approved range 2…200°C
Absolute temperature difference 1…150K
Homologation range 3…150K
Response limit 0.2 K
Temperature resolution t (display) 0.1°C
Temperature resolution t (display) 0.01 K
Measuring cycle Temperature measurement: precision better than EN1434-1 request
30 seconds when battery operated (Type D)
3 seconds when mains operated
Display units 8 digits LCD-Display
Energy kWh, MWh, GJ, MJ, BTU
Volume m3, Gallon
Additional pulse inputs volume or energy
Temperature °C, °F or K
Voltage supply modular optional
Battery type D 10 + 1 year
Mains 110…240VAC or 220…240VAC – 50/60 Hz
Mains 12…24VAC 50/60 Hz or 12…24VDC
Degree of protection
Flow sensor IP68
Integrator IP65
For more details click here.