E+E EE75 Specifications

EE75

The EE75 series air velocity transmitters were developed to
obtain accurate measuring results over a wide range of velocities
and temperatures.
A high-quality hot film sensor element based on cutting-edge thin
film technology ensures maximum sensitivity, even at lowest mass
flows. At the same time, the innovative probe design produces reli­able measuring results at high flow velocities of up to 40m/s (8000ft/min).

The integrated temperature compensation minimises the temperature
cross-sensitivity of the EE75 series which, combined with the robust
mechanical design, allows it to be used at process temperatures
between -40 to +120 °C (-40 to 248 °F).

High-Precision Air / Gas Velocity Transmitter

for Industrial Applications

In addition to air velocity and temperature values, the transmitter
calculates the volumetric flow rate in m³/min or ft³/min. The cross
section of the duct needs to be determined for this purpose and the
volumetric flow rate can be displayed and directed to one of the
analogue outputs.

The configuration software included in the scope of supply allows to
choose the appropriate output parameter and freely scale the dis­play range and signal level of the two analogue outputs. In addition
user-friendly calibration of the air velocity and temperature and the
adjustment of key parameters (e.g. response time of the velocity
measurement, low flow cut-off points, etc.) are supported as well.

An optional illuminated display with two control buttons integrated in
the cover is available. In addition, this enables changes of the configu­ration to be made directly on the unit.

The EE75 series has a robust metal housing to protect against
possible damage in rough industrial environments. There are four differ­ent models, providing a comprehensive range of mounting options:

- Model A for wall mounting

- Model B for duct mounting

- Model C with remote probe

- Model E with remote probe, pressure-tight up to 10bar (145psi)

The EE75 series can be used to measure the velocity of other
gasses as well, although a correction has to be applied to the unit at
the factory.

Model A

Model B

Model C

Typical Applications

- monitoring incoming and outgoing air
(energy management) in HVAC applications

- filter monitoring and laminar flow
control in cleanrooms

- exhaust systems, exhaust hoods and
glove boxes in the pharmaceutical,
bio and semiconductor industries

- mass flow measurement during
incineration processes

- monitoring and measurement
of compressed air systems

- air conveying systems

- wind tunnels and climate simulators

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Features

high accuracy

working range 0...40 m/s

measurement of air velocity and temperature

calculation of volumetric flow rate

low dependence on angle of inflow

probe diameter 8 mm

remote probe up to 10 m (32.8 ft)

easy mounting and maintenance

correction for pressure, humidity and media

pressure tight up to 10 bar

SI and US units selectable

v2.0 / Modification rights reserved

(0...8000 ft/min) and

-40...120 °C (-40...248 °F)

low flow cut-off

(145 psi)

(0.3”)

EE75

EE75

Technical Data

Measuring value

Air velocity

Working range 0... 2 m/s

0... 10 m/s (0...2000 ft/min)

0... 40 m/s (0...8000 ft/min)
Accuracy1) in air at 25 °C (77 °F)2) 0.06... 2 m/s (12...400 ft/min) ± 0.03 m/s / 6ft/min

at 45 % RH and 1013 hPa 0.15...10 m/s

0.2... 40 m/s (40...8000 ft/min) ± (0.20 m/s / 40 ft/min + 1 % of measuring value)
Uncertainty of factory calibration

1)

± (1 % of measuring value, min. 0.015 m/s (3 ft/min))
Temperature dependence electronics typ. -0.005 % of measuring value / °C
Temperature dependence probe ± (0.1 % of measuring value/°C)
Dependence of angle of inflow: < 3 % for α < 20°
of direction of inflow: < 3 %

Response time

3)

τ

< 1.5...40 s (configurable)

90

Temperature

Working range probe: -40...120 °C (-40...248 °F)
probe cable: -40...105 °C (-40...221 °F)
electronic: -40...60 °C (-40...140 °F)
electronic with display: -30...60 °C (-22...140 °F)
Accuracy at 20 °C (68 °F) ±0.5 °C (±0.9 °F)

Temperature dependence electronics typ. -0.01 °C / °C

Response time

3)

τ

90

10 s

Outputs

output signals and display ranges are freely scaleable (see ranges below)
voltage 0-10 V (e.g: 0-5 V, 1-5 V etc.) -1 mA < I
current (3-wire) 0-20 mA (e.g: 4-20 mA etc.) RL< 350 Ohm
v-scaling 0...2 / 10 / 40 m/s (0...400 / 2000 / 8000 ft/min)
T-scaling -40...120 °C (-40...248 °F)
Vol-scaling 0...10000 m³/min (0...353147 ft³/min)

General

Supply voltage 24 V DC/AC ± 20 %
Current consumption max. 100 mA; max. 160 mA (with display)
Working range humidity 0...99 % RH - no condensation
Connection screw terminals max. 1.5 mm
Electromagnetic compatibility EN61326-1 EN61326-2-3 ICES-003 ClassB

Industrial Environment FCC Part15 ClassB
Pressure range Model E pressure tight up to 10 bar (145 psi)
Material housing / protection class: metal (AlSi3Cu) / IP65; Nema 4
measuring probe: stainless steel
measuring head: PBT (polybuthylenterephthalat)
System requirements
for configuration software Windows 2000 or higher
Interface USB 1.1

1) The accuracy statement includes the uncertainty of the factory calibration with an enhancement factor k=2 (2-times standard deviation).
The accuracy was calculated in accordance with EA-4/02 and with regard to GUM (Guide to the Expression of Uncertainty in Measurement).

2) Accuracy refers to measurement in air

3) Response time τ

is measured from the beginning of a step change to the moment of reaching 90% of the step.

90

(0...400 ft/min)

(30...2000 ft/min) ± (0.10 m/s / 20 ft/min + 1 % of measuring value)

< 1 mA

L

2

(AWG 16)

Configuration Software

An easy setup of the EE75 can be made via standard USB interface and the
software included in the scope of supply.
The user can easily set the response time, correct for the gas (air)
pressure, perform an one or two point adjustment and define the duct cross
section for the volumetric flow rate.

EE75

v2.0 / Modification rights reserved

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