Engelmann SensoStar U Ultrasonic Heat & Cooling Energy Meter (HVAC / BTU Meter)
 
Description:
The Engelmann SensoStar U is a high-precision ultrasonic thermal energy meter designed for accurate measurement of heating and cooling consumption in modern HVAC systems.
Using advanced ultrasonic time-of-flight technology, the meter delivers highly reliable and maintenance-free energy measurement with no moving parts, ensuring long-term accuracy and durability.
 
The SensoStar U is ideal for use in chilled water air-conditioning systems, district heating and cooling networks, and commercial or residential developments where individual energy consumption needs to be measured and billed per unit, tenant, or zone.
 
In chilled water HVAC systems, the meter calculates cooling energy usage by measuring both the water flow rate and the temperature difference between supply and return pipes. This enables accurate, fair, and transparent energy billing for air-conditioning consumption.
 
With flexible installation options, a detachable calculator, and modular communication capability, the SensoStar U is perfectly suited for smart buildings, energy management systems, and future-ready metering solutions.
 
Key Features:
Ultrasonic measurement technology (Time-of-Flight)
No moving parts for long lifespan and minimal maintenance
High accuracy measurement (MID Class 2)
Suitable for both heating and cooling applications
Ideal for HVAC and chilled water air-conditioning systems
Enables accurate energy billing per unit, tenant, or zone
Inline installation for heating and cooling circuits
Available sizes from DN15 to DN40
Flow ranges from Qp 0.6 to Qp 10 m³/h
Flexible installation (horizontal, vertical, or overhead)
Installation in supply or return pipe
Return flow detection and air detection functionality
Detachable calculator for flexible installation
Clear LCD display for consumption readings
IP68 protection rating
Modular communication (future-ready for M-Bus, LoRaWAN, etc.)
Long battery life (up to 20 years)
 
Measurement Technology:
Measurement Method: Ultrasonic (Time-of-Flight)
Accuracy Class: MID Class 2
Temperature Resolution: 0.01°C
Flow Measurement Cycle: 2 seconds
Dynamic Temperature Measurement Cycle: 2 / 60 seconds
 
Technical Specifications:
Nominal Flow Rates (Qp)
0.6 m³/h
1.5 m³/h
2.5 m³/h
3.5 m³/h
6 m³/h
10 m³/h
 
Nominal Sizes:
DN15
DN20
DN25
DN32
DN40
 
Dynamic Range:
Up to 1:125 (depending on model)
 
Nominal Pressure:
PN16
 
Temperature Ranges:
Heating Applications
Standard: 15°C – 90°C
Optional high-temperature version: up to 130°C
Cooling / Air-Conditioning Applications
5°C – 50°C
Temperature Difference Range
Heating: 3 – 100 K
Cooling: −3 – 50 K
 
Environmental Conditions:
Ambient Operating Temperature: 5°C – 55°C
Storage Temperature: −25°C – 55°C
Transport Temperature: −25°C – 70°C
 
Typical Applications:
✔ Air-conditioning energy measurement in chilled water systems
✔ HVAC energy monitoring in commercial buildings
✔ District heating and cooling systems
✔ Apartment and tenant energy billing
✔ Smart building and BEMS integration
✔ Industrial heating and cooling monitoring
 
Lead Time:
7-10 Days.