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Product at a glance

Static heat and cooling meter

The Calorio 500 is Secure’s next-generation thermal energy meter, succeeding the well-known Calorio 150. This new series is characterised by user-friendly modularity in design and fully meets customer-specific requirements, including simplified system integration, tariff and data logger functions, universal data transfer and connection to system processors.

It is suited as a heat or cooling meter. According to standard EN1434, class 2 is based on the fluid oscillation principle. It covers a wide range of flows for all industrial and district heating and cooling applications or building automation applications. It guarantees high stability and repeatability for reliable and precise flow and thermal energy measurements.

The Calorio 500 design aims for a high degree of flexibility while keeping future standards in mind. The additional pulse inputs allow the connection of hot or cold water, gas, oil, and electricity meters. In addition to its extensive range of data communication options and flexibility for collecting and recording dynamic plant data.



  • Calculator for heat meters, cooling meters or combined heat / cooling meters
  • Battery or mains powered for increased flexibility
  • Calculator upper part can be exchanged while wiring remains in place
  • Modules can be retrofitted or replaced at any time without affecting approval
  • Self-recognition of optional modules
  • Native M-Bus or two extension slots (BACnet, Modbus, and others)
  • Optical interface according to IEC 62056-21:2002
  • 2- or 4-wire sensors without configuration
  • 2 pulse / state inputs and 2 pulse/state open-drain outputs
  • User-friendly menu navigation
  • Accuracy better than EN 1434 requiremen
  • 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 flanged fittings
  • Straight sections of piping of 3 DN in flow and return of any flow meter or heat meter must be respected. For the Calorio 500 up to DN 40 (qp10), the straight sections of piping of 3 DN are already included in the length of the flow sensor
  • No moving parts, no wear
  • Not sensitive to dirt
  • For horizontal, upstream and downstream pipes, independent mounting position
  • Common spare parts qp 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 in poor water quality

Technical data display

Technical data display
Temperature measurement • Pt 500 according to EN 60751
• 2 – or 4-wire
• Absolute temperature range
• Approved range
• Homologation range
• Response limit
• Temperature resolution t
• Temperature resolution Δt
• Environment class A
−20 °C to 200 °C
1 °C to 200 °C
3 K to 150 K
0,2 K
0,1 K
0.01 K
Temperature measuring cycle • Battery operated
• Mains operated
10 s
3 s
Medium temperature • Operation
• Storage and transport
5 °C to 55 °C
−20 °C to 70 °C (dry environment)
3 s
Display Illuminated dot-matrix 128 × 64 pixels
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