ENS160+AHT21 CO2 TVOC Temperature Humidity Sensor Module

Monitor your indoor air quality with precision using the ENS160 + AHT21 Multi-Gas & Environmental Sensor Module. This compact, high-performance sensor combo detects equivalent CO2 (eCO2), Total Volatile Organic Compounds (TVOC), ambient temperature, and relative humidity — all in a single lightweight board. Perfect for Arduino projects, smart home systems, IoT devices, HVAC monitoring, and DIY electronics.

Whether you're building an air quality monitor, a weather station, or an automated ventilation system, the ENS160+AHT21 delivers reliable, low-power sensing with fast startup times and wide compatibility via I²C and SPI interfaces.

Key Features

• Dual-Sensor Combo: ENS160 multi-gas sensor + AHT21 temperature & humidity sensor on one compact board
• Monitors: eCO2 (equivalent CO2), TVOC (Total Volatile Organic Compounds), air temperature, and relative humidity
• Wide Measurement Range: TVOC 0–65,535 ppb; ambient temperature –40°C to +85°C
• Fast Startup: Warm-up in under 1 minute; operational in under 1 hour
• Multiple iAQ Outputs: TVOC, eCO2, and AQI (Air Quality Index) — all in one sensor
• Dual Interface: I²C and SPI supported for easy integration with Arduino, Raspberry Pi, and other microcontrollers
• Low Operating Voltage: VDD 1.71–1.98V / VDDIO 1.71–3.6V
• Ultralight: Only 1.65g — ideal for portable and embedded applications
• Polymer construction for durability in a wide range of environments
• CCS811 Upgrade: A direct, improved replacement for the CCS811 sensor module

Specifications

What's in the Box

• 1× or 5× ENS160+AHT21 Sensor Module (select your quantity above)

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Frequently Asked Questions

Q: What does the ENS160+AHT21 sensor module measure?

A: The ENS160+AHT21 module measures equivalent CO2 (eCO2), Total Volatile Organic Compounds (TVOC), ambient air temperature (–40°C to +85°C), and relative humidity. It provides multiple iAQ (indoor Air Quality) outputs including TVOC concentration, eCO2 level, and an Air Quality Index (AQI) — all from a single compact board.

Q: Is the ENS160+AHT21 compatible with Arduino and Raspberry Pi?

A: Yes! The module supports both I²C and SPI communication interfaces, making it broadly compatible with Arduino, Raspberry Pi, ESP32, ESP8266, STM32, and most other popular microcontroller platforms. It is also a direct upgrade replacement for the CCS811 sensor module.

Q: How quickly does the ENS160+AHT21 sensor become operational?

A: The sensor has a warm-up time of under 1 minute and reaches full operational stability in under 1 hour. This makes it suitable for both continuous monitoring setups and periodic sampling applications in smart home and IoT environments.

Q: How many units can I order, and can the module be customized?

A: You can purchase the ENS160+AHT21 sensor module in a single unit (1 pc) or a value pack of 5 units. Customization options are also available — please contact us for bulk or custom orders.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.