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Air Flow Sensor for HVAC

EE650

The EE650 air flow sensor is designed for accurate and reliable measurement in building automation and ventilation applications.

EE650 air velocity sensor for laminar flow – straight version

EE650 air velocity sensor for laminar flow – angled version

Key Features
Measurands
Technical data

EE650 employs the new VTQ air flow sensor element, which operates on the thermal anemometer principle and is manufactured by E+E in state-of-the-art thin film technology.

Due to its innovative design, the VTQ air flow sensor element is very robust and highly insensitive to pollution, which leads to outstanding long-term performance. 

The measured data is available either on an analogue voltage or current output, user selectable, or on the RS485 interface with Modbus RTU or BACnet MS/TP protocol.

The enclosure design and the mounting flange included in the scope of supply allow for easy installation or replacement. The configuration and adjustment of the EE650 can be comfortably performed on the electronics board or via digital interface.

Key Features

  • Best accuracy and long term stability
  • High resistance to pollution and mechanical stress
  • Measuring range 0.2 - 10/15/20 m/s (40 - 2000/3000/4000 ft/min), user selectable
  • Current and voltage outputs, selectable
  • RS485 interface with Modbus RTU or BACnet MS/TP
  • Duct mount and remote probe versions
  • Easy installation
  • Digital interface for adjustment by user

Measurands

Bayonet screws

  • open/closed with a ¼ rotation

Appropriate for US mounting requirements

  • Knockout for ½” conduit fitting

Jumper adjustment

  • Measuring range, output signal and response time selectable by jumper

Electronics on the underside of the PCB

  • Optimum protection against mechanical damage during installation

Air velocity sensing element VTQ

  • High insensitivity to pollution
  • Long-term stable
  • Measurement from 0.2 m/s (40 ft/min)

Technical data

Measuring range – user selectable
0…10 m/s (0…2000 ft/min)
0…15 m/s (0…3000 ft/min)
0…20 m/s (0…4000 ft/min)
Accuracy at 20 °C (68 °F), 45 % RH, 1013 hectopascal
0.2…10 m/s ±(0.2 m/s + 3 % of mv)
0.2…15 m/s ±(0.2 m/s + 3 % of mv)
0.2…20 m/s ±(0.2 m/s + 3 % of mv)
Response time – user selectable
typ. 4 sec or typ. 1 sec.
Output Analogue
0-10 V and 4-20 mA
Output Digital
Modbus RTU or BACnet MS/TP
Supply
24 V AC/DC