Brochure

The CDE and CWE are non-dispersive infrared (NDIR) sensors designed
for measuring environmental CO
2
concentration in ventilation systems
and indoor living spaces. Their measurement range of 0 to 2000 ppm
makes them compliant with ASHRAE and other standards for ventilation
control
The CWE/CDE Series provides a user-selectable 4 to 20 mA or 0 to 10
Vdc output for versatility. Microprocessor-based digital electronics and
a unique self-calibration algorithm improves long-term stability and
accuracy.
Input Power
Class 2; 20 to 30 Vdc/24 AC 50/60 Hz; 100 mA
max.
Analog Output
4 to 20 mA (clipped & capped)/0 to 10 Vdc
(selectable)
Operating Temp. Range 0 to 50 °C (32 to 122 °F)
Operating Humidity
Range
0 to 95% RH non-condensing
Housing Material High impact ABS plastic
Terminal Block Torque:
CDE
CWE
0.5 to 0.6 N-m (4.4 to 5.3 in-lbf) max.
0.2 N-m (2.0 in-lbf) max.
Terminal Block Wire Size:
CDE
CWE
24 to 12 AWG (0.25 to 2.5mm
2
)
28 to 20 AWG (0.08 to 0.5mm
2
)
Sensor Type Non-dispersive infrared, diffusion sampling
Output Range 0 to 2000 ppm
Accuracy ±30 ppm ±2% of measured value*
CWE
CDE
RTD/Thermistors in wall housings are not compensated for internal heating of product.
EMC Conformance: Low voltage directive 2014/35/EU and EMC directive 2014/30/EU.
EMC Special Note: Connect this product to a DC distribution network or an AC/DC power
adaptor with proper surge protection (EN 61000-6-1 specification requirements).
* Measured at NTP
**The CE mark indicates RoHS2 compliance. Please refer to the CE Declaration of
Conformity for additional details.
Note: Rough handling and transportation may cause a temporary reduction of CO
2
sensor
accuracy. With time, the ABC function will tune the readings back to the correct accuracy
range. The default tuning speed is limited to 30 ppm per week.
Repeatability ±20 ppm ±1% of measured value
Response Time <60 seconds for 90% step change
WARRANTY
Limited Warranty 3 years
AGENCY APPROVALS
**
APPLICATIONS
• Controlling ventilation in
response to occupancy
• Facilitating compliance with
ASHRAE 62.1 standard for
air quality
• Office buildings, conference
rooms, schools, retail stores, etc.
SPECIFICATIONS
800.354.8556
|
+1 503.598.4564
|
[e-mail]
|
[e-mail]
|
www.veris.com
TM
Air Quality / Gas Detection | Standard Duct and Wall CO
2
Sensors
CDE & CWE SERIES
Field-selectable 4 to 20 mA / 0 to 10 Vdc Output
Microprocessor
based
Microprocessor-based design
increases accuracy and reduces
installation time
4 to 20 mA/
0 to 10 Vdc
4 to 20 mA/0 to 10 Vdc output for
flexible control system interface
NDIR
Non-dispersive infrared
technology (NDIR) repeatable to
±20 ppm ±1% of measured value...
high accuracy measurements
Self-calibrating
Innovative self-calibration
algorithm...easy to maintain.
5-year calibration interval
(recommended)
Sensitivity
Low ambient sensitivity
HQ0001740.G 0117