The 7Semi CO₂, Temperature & Humidity Probe is a compact and reliable environmental sensing solution designed for indoor air quality monitoring and IoT applications. It provides accurate measurements of carbon dioxide concentration, ambient temperature, and relative humidity with factory-calibrated outputs.
With its digital I²C interface, low power modes, and integrated compensation algorithms, the 7Semi probe delivers stable performance across a wide range of applications.
Key Features
-
7Semi 3-in-1 measurement: CO₂, temperature, and humidity
-
Measurement range: CO₂ 400–5000 ppm (extended up to 32,000 ppm)
-
Accuracy: ±100 ppm + 10% of reading for CO₂; ±0.1 °C for temperature; ±1.0 %RH for humidity
-
7Semi I²C digital interface with factory-calibrated output
-
Low power operation: Continuous, single-shot, and sleep modes
-
Compact & lightweight 7Semi probe for easy integration
Applications
-
Indoor Air Quality Monitoring (offices, schools, homes, hospitals)
-
Smart HVAC & Ventilation Systems
-
IoT Environmental Sensors & Smart Agriculture
-
Portable CO₂ Measurement Instruments
-
Air Purifiers & Smart Home Devices
FAQ
Q1. What measurements does the 7Semi CO₂, Temperature & Humidity Probe provide?
A: The 7Semi probe provides three key parameters: CO₂ concentration (ppm), ambient temperature (°C), and relative humidity (%RH).
Q2. How accurate is the 7Semi CO₂ measurement?
A: The probe offers CO₂ accuracy of ±100 ppm + 10% of the reading within the 400–5000 ppm range, making it suitable for indoor air quality and HVAC applications.
Q3. What interface does the 7Semi probe use?
A: It uses a digital I²C interface that can be easily connected to microcontrollers like Arduino, STM32, Raspberry Pi, and ESP32.
Q4. Can I use the 7Semi probe in low-power applications?
A: Yes. The probe supports continuous, single-shot, and sleep modes, consuming as little as 1 µA in sleep mode, making it ideal for IoT and battery-powered devices.
Q5. What is the recommended operating environment?
A: The 7Semi probe is optimized for indoor air quality monitoring in the range of 10 °C – 40 °C, but it also measures temperature and humidity across wider ranges.
Q6. Does the 7Semi probe come factory calibrated?
A: Yes. Each probe is factory calibrated for CO₂, temperature, and humidity, ensuring accurate plug-and-play performance without user calibration.
Q7. Can the probe be used for portable devices?
A: Absolutely. Its compact size, low weight, and low power draw make it ideal for handheld air quality testers and portable monitoring equipment.
Q8. Is this probe suitable for smart agriculture?
A: Yes. The 7Semi probe is well-suited for greenhouse monitoring and smart farming where CO₂, temperature, and humidity are critical parameters.
Resources
-
7Semi Product Guide
-
7Semi Arduino/ ESP32 Example Code
- Supply Voltage:
- 3.3V
- Interfaces:
- I²C (Standard, Fast, Fast-Mode Plus)
- CO₂ Measurement Range:
- 400 – 5,000 ppm (extended up to 32,000 ppm)
- CO₂ Accuracy (400–5000 ppm):
- ±(100 ppm + 10% of reading)
- Resolution (CO₂):
- 1 ppm
- Temperature Accuracy:
- ±0.1 °C (0–65 °C)
- Humidity Accuracy:
- ±1.0 %RH (0–100 %RH)
- Operating Temperature:
- 10 °C – 40 °C (recommended for CO₂)
- Current Consumption:
- Current Consumption → 950 µA (continuous) / 100 µA (single-shot) / 1 µA (sleep)
- Microcontrollers compatible:
- Ardiuno, ESP32, ESP8266, STM32, Raspberry Pi, Arduino Nano 33 IoT, and nRF52-based boards.
