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Basic Information

EE66 air velocity transmitter series are designed for high accuracy measurement of lowest air velocities. It is the ideal solution for laminar flow control and special ventilation applications. The E+E thin film sensor is operating on an innovative hot film anemometer principle. This guarantees excellent accuracy for air velocity down to almost Om / s, which is not possible for conventional anemometers with commercial temperature sensors or NTC bead thermistors.

The E+E sensor is much more insensitive to pollution than all other anemometer principles. This increases reliability EE66 - A / B and reduces maintenance costs.

EE66 series are available with current or voltage output, the measuring range and the response time can be selected with jumpers by the user.

Low angular dependence enables easy, cost-effective installation. An integrated LC display and a version with remote sensing probe are also available.

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Technical Specifications
Measuring values
Working Range
  • 0...1m / s ( 0...2000 ft / min )
  • 0...5m / s ( 0...3000 ft / min )
  • 0...2m / s ( 0...4000 ft / min )
 
Output 0 - 10 V -1 mA IL < 1 mA
4 - 20 mA RL< 450 Ω (Linear 3 wires)
Accuracy at 20 °C ( 68°F ), 45 % RH and 1013hPa 0...1m/s ( 0...2000 ft / min ) ± (0.4 m / s / 7.9 ft / min + 2 % of m. v.)
0...5m/s ( 0...3000 ft / min ) ± ( 0.5 m / s / 9.8 ft / min+ 2 % of m. v. )
0...2 m / s ( 0...4000 ft / min ) ± ( 0.6 m / s / 11.8 ft / min+ 2 % of m. v. )
Response time T90 1) 2) typ. 4 sec. or typ. 0.2 sec. ( at constant temperature )
General
Power supply SELV 24V AC / DC ± 20 % SELV = Safety Extra Low Voltage
Current consumption for AC supply
for DC supply
max. 150 mA
max. 90 mA
 
Angular dependence < 3 % of measurement at I Δα I < 10°  
Cable gland M16 x 1.5 cable Ø4.5 - 10 mm ( 0.18 - 0.39 )
Electrical Connection screw terminals max. 1.5 mm2 ( AWG 16 )  
Electromagnetic Compatibility EN 50081-1
EN 50082-1
EN 50082-2
 
Housing / Protecting class Polycarbonat / IP65, Nema 4 With LC display IP40
1) Selectable by jumper
2) Response time T90 is measured from the beginning of a step change of air velocity to the moment of reaching 90% of the step.

Typical Applications

  • Clean room control
  • Laminar flow control

Features

  • Measurement down to 0 m / se
  • Low angular dependence
  • Easy Installation