6
User Manual EE850 Duct Sensor
3 Product Description
3.1 General
Installed into a duct, a small amount of air flows through the
divided probe into the EE850 enclosure, where the CO
2
sensing
cell is located, and back into the duct. The RH and T sensing
elements are placed inside the probe.
Very important
For accurate measurement the cover of EE850 as well as the
cable outlet – cable gland or conduit adapter – must be closed
tightly. This is essential for avoiding ingress of air other than
from the duct into the EE850 enclosure, which would falsify the
measurement.
Please note:
The direction of air flow in the duct shall
correspond to the direction indicated with arrows on the EE850
cover. Depending on the EE850 version, the response time
specified is only valid for direction marked with the blue arrow
with respect to the cable gland position. Air flow in the opposite
direction might lead to longer response time.
3.2 Installation
Recommended mounting screws:
ST4,2x50 DIN7981C
CABLE GLAND
M16x1,5
CONDUIT KNOCKOUT
RUBBER GASKET
Ø > 12 mm
Ø > 0.47“
80.6 mm
3.17“
Ø > 13 mm
Ø > 0.51“
According to ordering guide
101 mm
3.98“
19 mm
0.75“
60
±0.3
mm
2.36
±0.11
“
Ø > 16 mm
Ø > 0.63“
6 mm
0.24“
90
±0.3
mm
3.54
±0.11
“
46 mm
1.81“
5 mm
0.2“
EE850 with conduit connection for the North American market: use a flat screwdriver to carefully break
open the plastic knockout at the marked location, in order to avoid damaging the electronics inside the
enclosure. The conduit adapter is not included in the scope of supply.
CO
2
sensing cell
Humidity and
temperature sensor
Cable
gland
Closed
