SC8 NDIR CO2 Sensor Module 0–5000 ppm ±50 ppm +5% Accuracy UART + Analog Output -10°C to +50°C Operating Temp Compatible for LabVIEW

Price: GBP13.36
(as of Jun 03, 2026 00:18:27 UTC – Details)

Product description

Product Parameters

Input Voltage 3.3–5.5V DC (Wide Range, 5V Typical) Measurement Range 0–5000 ppm CO₂ Accuracy ±(50 ppm + 5% of Reading) @25°C Response Time <30s (T90, Gas Diffusion) Operating Temp -10°C to +50°C Humidity Compatibility 0–95% RH Output Options UART (Modbus Protocol) + Analog Voltage (0–3V) Lifespan >10 Years Dimensions 33.5×20×8.5 mm (Ultra-Compact)

Pin Functions

VIN (Red Wire): DC Input Positive (3.3–5.5V, Connect to Power Supply Positive)GND (Black Wire): Power & Signal Ground485A (Blue Wire): RS485 Bus A485B (Yellow Wire): RS485 Bus B (Modbus Return Line)OUT (White Wire): Analog Voltage Output

Common FAQs

Q1: Sensor returns erratic values (e.g., 251 error)!A: Power Stability Fix:Add 100nF capacitor between VIN and GND to suppress noise.Ensure voltage ≥4.5V (undervoltage triggers faults). Q2: UART communication fails with Arduino!A: Protocol Configuration:Set baud rate to 9600 (default) and address to 1.Use MAX485 module for 5V-to-3.3V logic level shifting. Q3: Readings drift in high-humidity Enviro nments!A: Enviro nmental Calibration:Avoid condensation – operate below 95% RH non-condensing.Enable ABC Logic (Automatic Baseline Correction) in firmware. Q4: Analog output stuck at 0V!A: Signal Validation:Verify OUT pin load impedance ≥10kΩ (low impedance shorts signal).Check solder joints at the output terminal.

【High-Accuracy NDIR Sensing】 Dual-wavelength NDIR technology ensures ±(50 ppm + 5% of reading) precision at 25°C; 0–5000 ppm range (extendable to 10,000 ppm); eliminates cross-interference from other gases; Suitable for indoor air quality monitoring in smart homes and offices
【Ultra-Low Power Consumption】 3.3–5.5 V DC wide input voltage; typical 30 mA operating current; integrated sleep mode via ABC logic (Automatic Baseline Correction); extends battery life in portable data loggers and IoT Enviro nmental monitors
【Dual Output Flexibility】 UART interface with Modbus protocol for industrial networks; 0–3 V analog voltage output (linear to 0–5000 ppm); compatible with Arduino (via MAX485 module), Raspberry Pi, and ESP32; supports real-time data logging without complex firmware
【Temperature Robustness & Calibration】 -10°C to +50°C operating range; 0–95% RH humidity tolerance (non-condensing); built-in temperature compensation and ABC logic to counter drift; not for high-pressure (>110 kPa)
【Plug-and-Play Integration】 33.5×20×8.5 mm compact module with pre-wired color-coded cables; 100nF capacitor recommendation for VIN/GND noise suppression; avoid impedance ≤10kΩ on analog output; includes Modbus address configuration guide for rapid deployment