SensoStar U Ultrasonic Energy Meter

Precision ultrasonic energy measurement with integrated flow sensor designed for compact installations. The SensoStar U combines advanced ultrasonic flow measurement technology with threaded connection capabilities, offering precise heating and cooling energy measurement in a compact form factor. Features detachable calculator, multiple communication options, and exceptional durability with up to 20-year battery life.

Key Features & Benefits:

  • Ultrasonic flow measurement with threaded connection for easy installation.
  • Compact sizes DN 15 - DN 40 suitable for residential and light commercial applications.
  • Any mounting position supported (horizontal, vertical, or overhead installation).
  • Backflow and air detection capabilities for enhanced system monitoring.
  • Detachable calculator with 0.85m or 2.85m connection cable options.
  • Dynamic temperature measurement cycle for rapid response and energy efficiency.
  • Battery life up to 20 years with multiple communication module options.
  • Class 2 MID accuracy for commercial billing applications.

Technical Specifications

Flow Sensor

Measurement MethodUltrasonic flow transit time
Accuracy ClassClass 2
Nominal Pressure16 bar
Sizes AvailableDN 15 - DN 40
Nominal Flow0.6 - 10 m³/h
Installation PositionAny (horizontal/vertical/overhead)
Protection ClassIP68

Calculator / Control Unit

Temperature Range0-150°C heating / 0-50°C cooling
DisplayLCD - 8 digits + special characters
Energy UnitsMWh, kW, m³, m³/h (kWh, GJ, MMBTU, Gcal)
Data Storage24 monthly and half-monthly values
Cable Length0.85m (optional: 2.85m)
Housing Dimensions75 x 110 x 34.5 mm (H x W x D)

Communication Options

Standard InterfaceOptical interface (M-Bus protocol)
Wireless Optionswireless M-Bus, LoRaWAN
Wired OptionsM-Bus, Modbus, 2 pulse outputs
Power SupplyReplaceable 3V lithium battery
Battery LifeUp to 20 years (without communication)
External PowerAvailable (input 230V / 24V)

Temperature Sensors

Sensor TypePlatinum precision resistor Pt 1000
Sensor DiameterUTS: 5; 5.2; 6mm; AGFW: 27.5; 38mm
Cable Length1.5m, 3m, 6m options
Installation TypeAsymmetric / symmetric
Connection2-wire technology

Downloads & Resources