Telaire T6743 | Internal CO2 Sensor for Automotive Applications

Telaire Internal CO2 Sensor for Automotive Applications

The Telaire T6743 Internal CO₂ Sensor is a nondispersive infrared (NDIR) CO₂ sensor that implements a single channel diffusion sampling method for automotive HVAC applications, including automatic fresh air control and safety sensing for CO2 refrigerants.

Along with the patented ABC Logic™ lifetime calibration warranty, its low power consumption, compact design and simple product integration, make this an affordable gas sensing solution. All units are factory-calibrated to measure CO₂ concentration levels up to 5,000 ppm.

For safety - Measure and control in-cabin CO₂ levels to prevent driver drowsiness.
For energy savings - Reduce variations in heating and cooling in-cabin through demand control ventilation.

Applications

Automotive HVAC - In-cabin air quality and comfort control

Features

ABC Logic™ - Lifetime calibration warranty
Lin 2.0 output
Low power consumption
Compact design
Versatile interface for simple product integration
Factory-calibrated to measure CO₂ concentration levels up to 5,000 ppm
Adjustable firmware variables
Custom packaging options
Subject to commercial consideration customization of firmware, connector and enclosure is possible

Specifications

ABC Logic	Automatic Background Calibration – The algorithm that uses ambient air concentrations to adjust the sensor and compensate sensor long-term drift. Adjustment cycle period is 12 – 192 hours of operation in active mode. Practical adjustment cycle depends on operating conditions.
Measurement Range	Air Quality Control: 400 – 5,000 ppm CO₂ Safety Alarm for Air Quality Control and CO₂: 400 – 40,000 ppm CO₂
Output Range	0 – 65,000 ppm CO₂
Measurement Period	Active Mode: 5 seconds Low Power Mode: 5 minutes Sleep Mode: 12 hours Timing of these modes can be configured per customer requirements.
Resolution and Repeatability	Internal Sensor Resolution: 1 ppm Repeatability: 30 ppm at 1000 ppm (Typical)
Accuracy in Active Mode	Range: 400 ppm to 5,000 ppm ±200 ppm or 10% of the reading, whichever is greater @ 0 to 50°C Range: 5,000 ppm to 40,000 ppm (4%) 10% of the reading @ 0 to 50°C
Temperature Dependence	Additional 0.5% of reading per °C or 5 PPM/C, whichever is greater outside the range 0 to 50°C
Pressure Dependence	0.135% of the reading per mm Hg
Response Time (90% of Step Change)	Active Mode: <40 seconds, dependent on test regime (Typical)
Warm-Up Time	First measurements in: < 5 sec after power-up < 2 minutes maximum accuracy in Active Mode
Total Lifetime	130,000 hours, limited by microcontroller flash retention specification
Operational Lifetime	In Active Mode: 45,000 hours
Relative Humidity	0-95% non-condensing