E+E EE85 Specifications
EE85
Duct mount CO2 Switch
EE85 is optimized for building automation as well as for process
control applications. It measures CO2 concentration based on
the Non-Dispersive Infrared (NDIR) technology. A patented auto-
EE85
calibration procedure compensates for the aging of the infrared
source and leads to outstanding long-term stability.
The air from the duct flows through the probe into the EE85
enclosure and back into the duct. Inside the enclosure the air
diffuses through a membrane into the CO2 sensing cell. As there
is no flow through the sensing cell, this is very well protected
against dust.
EE85 is available with measuring ranges of 0...2000, 0…5000 or
0…10000ppm and with two probe lengths. The switch threshold
and hysteresis can be set with potentiometers on the printed
circuit board.
The mounting flange included in the scope of supply facilitates installation in the ventilation ducts.
Typical Applications Features
building automation for residental and commercial areas
process control
very simple installation
compact size
auto-calibration
Technical Data
Measuring Values
CO2
Measurement principle Non-Dispersive Infrared Technology (NDIR)
Sensing element E+E Dual Source Infrared System
Measuring range 0...2000 / 5000 / 10000ppm
Accuracy at 25°C
and 1013mbar 0...5000ppm: < ± (50ppm +3% of measuring value)
0...10000ppm: < ± (100ppm +5% of measuring value)
Response time
Temperature dependence typ. 2ppm CO
Long term stability typ. 20ppm / year
Sample rate approx. 15s
Switch Output
Max. switching voltage 50V AC / 60V DC
Max. switching load 0.7A at 50V AC 1A at 24V DC
Min. switching load 1mA at 5V DC
Contact material Ag+Au clad
General
Supply voltage 24V AC ±20% 15 - 35V DC
Current consumption typ. 10mA
max. 0.5A for 0.3s
Warm up time
Housing / protection class PC / housing: IP65, probe: IP20
Cable gland M16 x 1.5
Electrical connection screw terminals max. 1.5 mm
Electromagnetic compatibility EN61326-1 FCC Part 15
EN61326-2-3 ICES-003 ClassB
Working temperature and conditions -20...60°C
Storage temperature and conditions -20...60°C
1) minimum flow speed 1m/s (200ft/min)
2) warm up time for performance according to specification
(77°F) 0...2000ppm: < ± (50ppm +2% of measuring value)
1)
τ
< 195s
63
2/°C
2)
< 5 min
cable Ø 4.5 - 10 mm (0.18 - 0.39”)
(-4...140°F) 0...95% RH (non-condensing)
(-4...140°F) 0...95% RH (non-condensing)
2
(AWG 16)
150
v1.8 / Modification rights reserved
EE85
Dimensions (mm)
∅12
(0.47”)
80
(3.15”)
37.2
(1.46”)
A
Operation Principle
Seal
A...according to ordering guide
Connection Diagram
NO = normally open
NC = normally closed
WR = working range
80 (3.15”)
ON
OFF
relay status
Hysteresis [% of WR]
switching off
25% of WR
air flow direction
Level [% of WR]
on
switching
1000500
CO2 sensing
element
2000
ppm
Ordering Guide Order Example
MEASURING RANGE
0...2000ppm
0...5000ppm
0...10000ppm
EE85-
MODEL
(2) CO2 Switch (CS) 50mm (2)
(5) 200mm (5)
(10)
PROBE LENGTH
(see dimensions „A”)
Measuring range: 0...5000ppm
Model: CO2 Switch
Probe length: 200mm
EE85-5CS5
EE85
v1.8 / Modification rights reserved
151
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