YJJ GY-SGP41 VOC + NOₓ Air Quality Module for Smart Home and IoT Devices

Product Description:

YJJ GY-SGP41 VOC + NOₓ Air Quality Module for Smart Home and IoT Devices

Features:

I. Core Parameters (Based on SGP41 Chip + GY Module Board)

1. Detection Object and Output

Detected Gases: VOC (Volatile Organic Compounds), NOₓ (Nitrogen Oxides)

Algorithm Output: VOC Index 1–500, NOₓ Index 0–500; eCO₂ (Equivalent CO₂) can be calculated

VOC Measurement Range: 0–10,000 ppb (Typical 500–10,000 ppb)

NOₓ Measurement Range: 0–10,000 ppb

Resolution: 1 ppb (Original Signal 16 bits)

2. Response and Accuracy

VOC Response Time T90: <10 s

NOₓ Response Time T90: <250 s

Accuracy (Standard Conditions): VOC ±15%; NOₓ ±50 ppb

Long-term stability: <2%/month (anti-pollution, low drift)

3. Electrical characteristics (module)

Power supply voltage: DC 3.3V / 5V (compatible); onboard 1.8V LDO supplies SGP41

Operating current: ≈40 mA (peak); typical 3 mA @3.3V

Standby current: ≈0.1 μA

Communication interface: I2C (standard mode, 100 kHz), 7-bit address 0x59

4. Environmental and physical

Operating temperature: -30℃ ~ +70℃ (industrial grade)

Humidity: 0%–90% RH (no condensation)

Storage temperature: 5℃–30℃

Module size: 13 mm × 10.5 mm × 2 mm (including pin headers)

Chip package: DFN 2.44×2.44×0.85 mm

II. Key features

Dual gas integration: Single chip simultaneously measures VOC + NOₓ, outputs standardized index, no need for complex calibration.

Algorithm mature: Built-in Sensirion Gas Index algorithm, resistant to alcohol, perfume, etc. interference, long-term stable.

Wide temperature low power consumption: Available from -30℃ to +70℃, suitable for battery-powered IoT devices.

Plug-and-play: Direct I2C output of digital quantity, 3.3V/5V compatible, no need for peripheral circuits.

Expandable eCO₂: Convert VOC index to equivalent CO₂, meet comprehensive indoor air quality (IAQ) monitoring requirements.

III. Main applications

1. Indoor air quality monitoring (core)

Smart home: Air purifier, fresh air system, intelligent air conditioner (automatic speed adjustment / start/stop)

Office / classroom: Real-time monitoring of VOC (formaldehyde, benzene) + NOₓ (fume, exhaust)

Bedroom / baby room: Early warning of odors, harmful gases, ensure health

2. Household and risk control

Kitchen: (NOₓ/ automatically start)

Bathroom: Odor (VOC) monitoring, automatic exhaust

Air conditioner / fresh air: Automatically adjust air volume according to IAQ index, energy-saving

3. Industrial and IoT

Small factory / warehouse: Monitoring of volatile chemical substances leakage, painting exhaust gas

Portable detector: Handheld air quality pen, environmental monitoring terminal

IoT node: City micro-station, building automation (BA) system

Specifications: