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

156

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

157

Angular Dependence

The innovative design of the probe head
minimises the effect of the angle of
inflow on the measuring result. The
deviation of the measuring value remains
< 3 % up to an angle of inflow (α) of ± 20°
between the direction of inflow and the
sensor element's longitudinal axis.

velocity

sensor

measuring error [%]

α

angle of inflow α [°]

Low flow cut-off

Small temperature differences in shut-off pipes and ducts can cause minimal flows. Even these would
be detected and measured by the EE75. The resulting fluctuations in the output signal can be suppressed
by the low flow cut-off. Cut-off point and switching hysteresis can be specified using the configuration
software.

Calculation of volumetric flow

The EE75 measures air velocity in m/s or ft/min. The configuration software can be used to enter the cross­section. This enables the transmitter to calculate the volumetric flow rate in m³/min or ft³/min. The data can
be displayed and directed to one of the analogue outputs.

Connection versions

plug option C13 plug option C14

Lumberg
RKC 5/7

Lumberg
RSC 5/7

M16x1.5

M16x1.5

plug option C12standard

Lumberg
RKC 5/7

Lumberg

RSC 5/7

Connection Diagram

158

power supply +
analogue output

power supply +
analogue output

measuring probe

analogue outputs

supply

USB-interface

USB

power supply +
analogue output

v2.0 / Modification rights reserved

USB

EE75

Dimensions in mm

145 (5.7”)

115 (4.5”)

code “probe length”

60 (2.4”)

56 (2.2”)

∅8 (0.3”)

12 (0.5”)

EE75-VTB

Duct mounting

code “cable length”

code “probe length”

∅8 (0.3”)

12 (0.5”)

EE75-VTC

Remote probe

code “probe length”

12 (0.5”)

(0.3”)

∅8

EE75-VTA

Wall mounting

Mounting flange (included in the scope of supply)

2 (0.08")

sealing

80 (3.1")

EE75

v2.0 / Modification rights reserved

code “cable length”

code “probe length”

∅8 (0.3”)

12 (0.5”)

1/2” ISO or 1/2” NPT

EE75-VTE

Remote, pressure tight probe
up to 10 bar (145psi)

159

Ordering Guide

EE75-VTB

EE75-VTC

EE75-VTE

EE75-VTA

Hardware Configuration

Output 0...10 V 3 3 3 3

Working range 0...2 m/s 1 1 1 1

Probe length 200 mm 5 5 5 5

Cable length 2 m K200 K200

Display without display

Pressure tight 1/2” ISO thread HA03
feedthrough 1/2” NPT thread HA07

Plug cable glands

Software Configuration

Physical output 1 Select according to
parameters Temperature T [°C] (B)
outputs Velocity v [m/s] (N) output 2 Select according to

Measured value metric /SI

units non metric / US E01 E01 E01 E01

Scaling of v-output 0...0.5 (V01) 0...30 (V10) 0...2000 (V18)

in m/s or ft/min

Scaling of T-ouput -40...60 (T02) -30...120 (T09) 0...80 (T21)

in °C or °F

Measurement Air

1) Please declare the duct cross-section [m²] with your order.

4...20 mA 6 6 6 6

0...10 m/s 2 2 2 2

0...40 m/s 3 3 3 3

400 mm 6 6 6 6
600 mm 7 7 7 7

5 m K500 K500
10 m K1000 K1000

with display D06 D06 D06 D06

1 plug for power supply and outputs C12 C12 C12 C12
2 plugs for power supply / outputs and USB C13 C13 C13 C13
1 plug for USB C14 C14 C14 C14

1)

Volume

0...1 (V02) 0...35 (V11) 0...3000 (V19)

0...1.5 (V03) 0...40 (V12) 0...4000 (V20)

0...2 (V04) 0...100 (V13) 0...5000 (V21)

0...5 (V05) 0...200 (V14) 0...6000 (V22)

0...10 (V06) 0...300 (V15) 0...7000 (V23)

0...15 (V07) 0...400 (V16) 0...7800 (V24)

0...20 (V08) 0...1000 (V17) 0...8000 (V25)

0...25 (V09)

-10...50 (T03) -20...120 (T10) -40...80 (T22)

0...50 (T04) -10...70 (T11) -20...80 (T24)

0...100 (T05) -40...120 (T12) -20...60 (T25)

0...60 (T07) 20...120 (T15) -30...50 (T45)

-30...70 (T08) -30...60 (T20) -20...50 (T48)

Nitrogen N B B B B
Carbon dioxide CO

v [m³/min] (O)

2

Ordering Guide (B,N,O)

Ordering Guide (B,N,O)

Select according to

Ordering Guide (Vxx)

Select according to

Ordering Guide (Txx)

Other T Scaling refer to
data sheet „T-Scalings“

C C C C

Order Example

EE75-VTB325C12/BN-V05-T07

Model: duct mounting
Output: 0...10 V
Working range: 0...10 m/s
Probe length: 200 mm (7.9”)
Display: without
Plug: 1 plug for power supply and outputs

Output 1: T
Output 2: v
Measured value units: metric / SI
v-Scaling: 0...5 m/s
T-Scaling: 0...60 °C
Measurement media: air

160

(0...2000 ft/min)

v2.0 / Modification rights reserved

EE75