1pcs ENS160+AHT21 Air Quality & Environmental Sensor Module – Multi-Gas, TVOC, eCO2, Temperature & Humidity Detection with I2C/SPI

Features
VOC & Gas Detection:
Monitors volatile organic compounds (toluene, hydrogen, ethanol, NO2, ozone) and calculates eCO2 (equivalent CO2) and TVOC (total volatile organic compounds, 0–65535ppb) for accurate IAQ (Indoor Air Quality) assessment.
Four metal-oxide (MOX) sensor elements enable broad gas detection, with outputs including AQI (Air Quality Index) for intuitive air quality visualization.
Performance & Interface:
Fast preheating (<1 minute warm-up, <1 hour startup) for quick deployment.
Supports I2C (standard mode) and SPI interfaces for flexible connectivity to microcontrollers (Arduino, Raspberry Pi, etc.).
Operates in 5–95%RH humidity and -40°C to +85°C temperature, with VDD 1.71–1.98V (core) and VDDIO 1.71–3.6V for low-power compatibility.
AHT21 Temperature & Humidity Sensor Features
Precision Sensing:
Measures temperature (-40°C to +120°C) with ±0.3°C typical accuracy (0.01°C resolution) and humidity (0–100%RH) with ±2%RH (25°C) typical accuracy (0.024%RH resolution).
Calibrated digital output via standard I2C protocol, eliminating the need for external signal processing.
Compact & Robust Design:
3x3mm pin-less SMD package (0.8mm height) suitable for reflow soldering, ideal for space-constrained applications.
Improved ASIC and capacitive sensor technology ensures stable performance in harsh environments, surpassing previous-generation reliability.
Technical Specifications
ENS160:
Gas Range: TVOC/eCO2 0–65535ppb, AQI 0–500.
Interface: I2C (100kHz/400kHz), SPI (up to 10MHz).
Power: 1.71–1.98V (core), 1.71–3.6V (IO), <5mA active current.
AHT21:
Range: Temperature -40°C to +120°C, humidity 0–100%RH (non-condensing).
Interface: I2C (100kHz/400kHz), 7-bit default address (0x38).
Power: 2.0–5.5V DC, <500μA active current, 1μA standby.
Package Includes
1 × ENS160+AHT21 Sensor Module
Comprehensive Indoor Air Quality Monitoring – Combines ENS160 multi-gas sensing (TVOC, eCO2, AQI) and AHT21 precision temperature/humidity detection for holistic environmental analysis.
Wide Gas Detection Range – ENS160 identifies volatile organic compounds (VOCs: toluene, hydrogen, ethanol, NO2, ozone) with 4 MOX sensor elements, outputting 0–65535ppb TVOC and eCO2 values for air quality assessment.
High-Accuracy Environmental Sensing – AHT21 delivers ±0.3°C temperature (0.01°C resolution) and ±2%RH (25°C) humidity (0.024%RH resolution) in a compact 3x3mm SMD package, ideal for harsh environments (-40°C to +120°C, 0–100%RH).
Dual Interface & Low Power – Supports I2C (standard for AHT21) and SPI/I2C (ENS160) for flexible integration; ENS160 operates on 1.71–1.98V (core), 1.71–3.6V (IO); AHT21 works with 2.0–5.5V for broad microcontroller compatibility.
Fast Startup & Diverse Applications – ENS160 preheats in <1 minute, startups in <1 hour; suited for HVAC, air purifiers, smart homes, industrial control, and medical devices, with rugged operation across -40°C to +85°C (ENS160) and -40°C to +120°C (AHT21).