Supplier information
CO2 Module T6703 Carbon dioxide sensor, CO2 sensor, T6703-5K small size high accuracy
Telaire T6703 Series of CO2 Modules is ideal for applications where CO2 levels need to be measured to assess indoor air quality, such as residential applications. All units are factory-calibrated to measure CO2 concentration levels up to 5000 ppm.
Applications
- Air Purifiers
- Air Conditioning
- Home monitoring
- Desktop IAQ
- Consumer products
Features
- An affordable gas sensing solution for OEMs.
- Eliminates the need for calibration in most applications with Telaire’s patented ABC LogicTM software. Lifetime calibration warranty.
- A reliable sensor design based on 20 years of engineering and manufacturing expertise.
- Flexible CO2 sensor platform designed to interact with other microprocessor devices.
- Compact design for simple product integration.
Specifications
| Subject | Specification |
|---|---|
| Method | Non Dispersive Infrared (NDIR), gold plated optics,diffusion sampling (with Telaire’s Patented ABC Logic Self Calibrated Algorithm) |
| Measurement Range | 0 to 5000 ppm |
| Dimensions | 1.18 in X 0.61 in X 0.34 in (30 mm X 15.6 mm X 8.6 mm) |
| Accuracy* | 400-5000 ppm ± 75 ppm or 10% of reading, whichever is greater |
| Temperature Dependence | 5 ppm per °C or 0.5% of the reading per °C, whichever is greater |
| Stability | < 2% of FS over life of sensor (15 years typical) |
| Pressure Dependence | 0.13% of reading per mm Hg |
| Calibration Interval | Not required |
| Response Time | < 3 minutes for 90% step change typical |
| Signal Update | Every 5 seconds |
| Warm Up Time | < 2 minutes (operational) 10 minutes (maximum accuracy) |
| Operating Conditions | 14°F to 140°F (-10°C to 60°C), 0 to 95% RH, non-condensing |
| Storage Conditions | -22°F to 158°F (-30°C to 70°C) |
| Power Supply Requirements | 4.5-5.5 VDC Peak 200mA (155mA typical) Average 25mA (20mA typical) |
Available models
| Part Number | Sampling Method | Measurement Range |
|---|---|---|
| T6703 | Diffusion | 0-2000 ppm |
| T6703-5k | Diffusion | 0-5000 ppm |
Documents
- Application Note FAQ pdf
- Product spotlight pdf
- Specifications pdf
- Self Calibration pdf
Pin Designations
| Connector Pin-out | Function / Alternate |
|---|---|
| 1 | TX (UART) / I2C_SDA |
| 2 | RX (UART) / I2C_SCL |
| 3 | V+ |
| 4 | V- / GND |
| 5 | PWM Output |
| 6 | No Connect / Ground / 10k pull down to select interface / RS485 Flow Control |
Programming
- User instructions pdf
Library: https://github.com/AmphenolAdvancedSensors/Telaire/tree/T6700_Series
Example at: https://github.com/AmphenolAdvancedSensors/Telaire/blob/T6700_Series/T6700-R15_I2C_v1.0.ino
This example is used for testing at TestT6703, see below.
Alternative Arduino library: https://www.arduino.cc/reference/en/libraries/telaire-t6700-co2-sensor-module-library/
Test I2C scanner
- Use Arduino IDE 1.8.13
- Tools -> Board "Arduino Nano"
- Tools -> Processor "ATmega328P (Old Bootloader)"
- Tools -> Programmer "Arduino ISP"
- File -> Examples -> Wire -> i2c_scanner
Result on the serial monitor:
21:12:16.789 -> I2C Scanner 21:12:16.789 -> Scanning... 21:12:16.789 -> I2C device found at address 0x15 ! 21:12:16.856 -> I2C device found at address 0x3C ! 21:12:16.856 -> done 21:12:16.856 -> 21:12:21.842 -> Scanning... 21:12:21.842 -> I2C device found at address 0x15 ! 21:12:21.875 -> I2C device found at address 0x3C ! 21:12:21.909 -> done 21:12:21.909 ->
- The device at address 0x15 is the T6703-5K.
- The device at address 0x3C is the OLED display based on a SSD1315 driver.
Test T6703 and OLED display
Code at TestT6703.
First run result:
T6700-R15 I2C v1.0 T67xx Serial Number: 2001427511 Firmware Number: 208 Sensor Status OK Mode is: Measure on Demand 1364 2609 button initiated 4130 button initiated 12511 1546 4855 6787 7216 7176 button initiated 7156 button initiated 7121 button initiated 6854 6414 8007 10237 11520 11213 11083 10551 10327 10420 10486 10522 10557 10581 10533 10487 10442 10447 10452 10459 10466 10429 10393 10420 10447 10446 10408 10371 10356 10355 10355 10356 10261 10097 10012 9654 9579 9539 9500 9460 9371