The T6713-6H is a compact CO2 sensor module designed for high-accuracy measurement of carbon dioxide levels in indoor air quality and demand control ventilation applications. It employs Non-Dispersive Infrared (NDIR) technology with gold-plated optics and diffusion sampling, combined with Telaire's patented ABC Logic self-calibration algorithm that eliminates the need for recalibration in most applications. The sensor measures CO2 concentrations from 0 to 5000 ppm with accuracy of ±30 ppm ± 3% of reading (400–5000 ppm range), operates over -10°C to 60°C, and features multiple digital output options including I2C (up to 100 kHz), UART (19200 Baud with Modbus support), and PWM output. With a compact footprint of 30 mm × 15.6 mm × 8.6 mm, low average power consumption of 20 mA typical, and response time under 3 minutes for 90% step change, the T6713-6H provides a reliable, affordable sensing solution for OEMs requiring integrated CO2 monitoring without ongoing calibration maintenance.