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CO2 Sensor
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CO2 Sensors

Measure CO2 levels in ppm using NDIR technology. Read More

Quantity Item Name Item Number Price
CO2 Monitor 2655 $795.00
CO2 Monitor- International 2655X $790.00
Product Features

CO2 Sensor

Nondispersive infrared (NDIR) technology measures CO2 levels in ppm. May be used as a handheld portable (internal, rechargeable battery) or wall-mounted for continous recording and data logging with a WatchDog Data Logger (one CO2 meter per logger).

Includes 6-volt DC transformer. Range: 0-4,000 ppm. Accuracy: +/- 5% of reading or 50 ppm, whichever is greater.

For connection with WatchDog Weather Stations



Dual Beam Absorption Infrared™
Display - LCD
Independent CO2 and Temperature readings.
Calculates and Displays Ventilation Rates
Sample Method
Diffusion or flow through (50 - 100 ml/min)
Performance - CO2 Channel
Measurement Range
0-10,000 ppm display
0-4,000 ppm voltage output
Display Resolution
± 1 ppm
±50 ppm or ±5% of reading up to 5,000 PPM (Above 5,000 PPM not
±20 ppm
Temperature Dependence
±0.1% of reading per °C or ±2 ppm per °C, whichever is greater, referenced
to 25°C
Pressure Dependence:
0.13% of reading per mm Hg (Corrected via user input for elevation)
Response Time
<60 seconds for 90% of step change
Warm-Up Time
<60 seconds at 22°C
Calibration Interval
12 months, offset adjustment using single gas at 0-1000 ppm CO2. Full
factory calibration available
Performance - Temperature Channel
Temperature Range
Voltage output 32 to 104°F (0 to 40°C)
Display 32 to 122°F (0 to 50°C)
Display Resolution
0.1°F (0.1°C)
Display Options
°F, °C, or Off. Set with panel button.
±2°F (±1°C)
Response Time
20-30 minutes (case must equilibrate with environment)
Calibration Interval
12 months, offset adjustment using temperature standard at 50 to 86°F
(10 to 30°C). Full factory calibration available
(Analog) CO2
0-4 VDC, 1mV/ppm (4,000 ppm max)
0-4 VDC linear, 32-104°F (0-40°C)
Output Impedance
100 Ohms
RS232 for use with Telaire® CO2View™ Graphing Software
(Wiring Connection)
One RJ-45 Connector
Dual Analog output plus digital output
Power Supply
Battery Type
Four AA batteries, not included
Battery Operation
80 hours (alkaline)
6 VDC from external AC/DC adapter, included
Power Requirements
100 mA Peak, 20 mA average from 6V
Operating Conditions
32-122°F (0-50°C)
0-95% RH, non-condensing
Storage Temperatures
-4 to 140°F (-20 to 60°C)
FCC Class 15 Part B
18 months parts and labor

Manuals / Literature

Find all of our Product Manuals and literature in our Documents Library