Renesas RRH47000-EVK board integrates RRH47000 CO2 sensor with ±75 ppm accuracy, relative humidity and temperature sensors

Renesas has recently released the RRH47000-EVK evaluation board based on the RRH47000 CO2 sensor using non-dispersive infrared (NDIR) technology to measure CO2 levels accurately (±75 ppm typical) within the 0-5000 ppm range. The sensor also includes built-in sensors for relative humidity and temperature, operates at low power, and supports either UART or I2C interface to the host. These features make this device useful for applications like HVAC systems, industrial automation, building control, air quality monitors, home appliances, IoT devices, and agriculture.

Previously we have written about the Sensirion SCD40 CO2 sensor which also uses NDIR to measure CO2 levels very accurately, while the Infineon PASCO2V15 CO2 sensor relies on photoacoustic spectroscopy (PAS) to detect CO2 levels. The Sensirion sensor can also measure humidity and temperature, but the Infineon sensor is designed to measure CO2 only.

Renesas RRH47000 specifications:

CO2 sensor
- Measurement range – 0 ppm to 5000 ppm
- Accuracy – ±75 ppm (typical)
- Response time – 80 s (T90%)
- Life span – >15 years
- Long-term accuracy drift – 3 ppm/day (without regular baseline correction)
- Standards compliance – RESET, WELL Building Standard, California Title 24, UBA
Integrated sensors
- Temperature
  - Measurement range – -40°C to 125°C
  - Accuracy – ±0.5°C
  - Resolution – 0.01°C
  - Long-term stability – 0.03°C/year
  - Response time – >2.0 s
- Relative Humidity
  - Measurement range – 0% to 100% RH
  - Accuracy – ±3.5% RH (20%-80% RH)
  - Resolution – 0.04% RH
  - Long-term stability – ±0.1% RH/year
  - Response time – 4.0s (typical)
Interfaces
- USART
  - Baud rate – 9600 bps
  - Voltage level – 3.3V
  - Supported commands – Measurement results, ABC parameters, serial number, firmware version, etc.
- I²C
  - Slave address – 0x31
  - Clock frequency – 10 kHz to 100 kHz
  - Data format – Big-endian
Misc
- Automatic baseline correction (ABC)
- Integrated sensor signal conditioning
- Compact design for various applications
- Standards-compliant design
Power
- Supply voltage – 4.5V to 5.5V
- Peak current – 220 mA
- Sleep current – 5 mA
- Average current – 10 mA (1 s sample time)
Dimensions – 40.8 mm × 19.7 mm × 9.1 mm
Temperature Range – -10°C to 50°C
Humidity – 0% to 95% RH (non-condensing)

The RRH47000-EVK evaluation board makes it simple to evaluate the company’s latest NDIR CO2 sensor and measure air quality, CO2, humidity, temperature, and particulate matter measurements. It uses a modular design with Pmod board connectors including one that supports I2C for integration with other sensors. The evaluation board also has pins for measuring power consumption and supply voltage. The kit includes the RRH47000 Sensor Board, ESCom Board, USB Cable, and Quick Start Guide, and connects to a Windows PC via USB for evaluation.

The kit works with Renesas Environmental Sensor Evaluation Software including a GUI and programming examples, available for free download, and the company also shares schematic, board layout, and other information which can be found in their Environmental Sensors Evaluation Kit Manual.

The RRH47000 CO2 sensor costs around $25.3 for a single unit available through Renesas. The RRH47000-EVK evaluation board on the other hand is sampling and you need to contact the company for samples. More information and a purchase link can be found on the product page.

Debashis Das

Debashis Das is a technical content writer and embedded engineer with over five years of experience in the industry. With expertise in Embedded C, PCB Design, and SEO optimization, he effectively blends difficult technical topics with clear communication