Z207933-0A
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©2021 Veris Industries USA 800.354.8556 or +1.503.598.4564 / [email protected] 0321
Alta Labs, Enercept, Enspector, Hawkeye, Trustat, Aerospond, Veris, and the Veris ‘V’ logo are trademarks or registered trademarks of Veris Industries, L.L.C. in the USA and/or other countries.
Other companies’ trademarks are hereby acknowledged to belong to their respective owners.
NOTICE
• This product is not intended for life or safety applications.
• Do not install this product in hazardous or classified locations.
• Read and understand the instructions before installing this product.
• Turn off all power supplying equipment before working on it.
• The installer is responsible for conformance to all applicable codes.
If this product is used in a manner not specified by the manufacturer, the protection
provided by the product may be impaired. No responsibility is assumed by the
manufacturer for any consequences arising out of the use of this material.
Installation Guide
Air Quality
Product Identification
Product Overview
The CWE2 Series of air quality sensors for living space are for use with BAS controllers designed to accept
4 to 20mA, 0 to 5 Vdc or 0 to 10 Vdc outputs. These sensors measure CO2 levels using a dual-beam, non-dispersive
infrared (NDIR) technology.
The CWE2 Series Economy sensor has an accuracy of ±30 ppm ±3% of measured value, features 2-wire 4 to 20mA
and 3-wire voltage outputs, and is available with optional temperature output.
CWE2 Series
Economy Wall Mounted Air Quality Sensors
Specifications
OPERATING ENVIRONMENT
Input Power
Class 2; 20 to 30 Vdc, 24 Vac, 50 to 60 Hz
Max. Current
20 mA
Analog Output
Selectable 4 to 20 mA, 0 to 5 V, 0 to 10 V
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
0.5 to 0.6 N-m (0.37 to 0.44 in-lbf)
CO2 TRANSMITTER
Sensor Type
Dual-beam, non-dispersive infrared (NDIR), diffusion sampling
Output Range
0 to 2000 ppm
Accuracy
±30 ppm ±3% of measured value
Repeatability
±20 ppm ±1% of measured value
Startup Time
≤20 seconds
Response Time
≤ 75 seconds for 90 degree step change
Max. Load Resistance*
100 Ω at 20 Vdc
250 Ω at 24 Vdc
500 Ω at 30 Vdc
WIRING TERMINALS
Terminal Blocks
Screw terminals, 18-24 AWG
Screw Terminal Torque
0.2 N-m (2.0 in-lbF) max.
CWE2
CWE2
User Interface
Blank
C
D
H
K
M
N
= None
= 1000 PT RTD
= 10K T2 thermistor
= 10K T3 thermistor
= 10K curve G/11K shunt
= 20K NTC thermistor
= 1.8K TAC thermistor
