SKU: SENS-3375
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ENS160+AHT21 Air Quality, Temperature & Humidity Sensor Module - I2C Interface

₹779.00 (Inclusive of all taxes)
Out of Stock

The ENS160+AHT21 sensor module integrates an ENS160 gas sensor and an AHT21 climate sensor to provide real-time monitoring of eCO2, TVOC, temperature, and humidity via a single I2C interface, making it ideal for Arduino, Raspberry Pi, ESP32, and other 3.3V/5V microcontroller systems.

Features

  • Integrated ENS160 gas sensor for eCO2 (400–65,535 ppm) and TVOC (0–65,535 ppb) measurement
  • Integrated AHT21 sensor for high-accuracy temperature (±0.3°C) and humidity (±2% RH) sensing
  • Single I2C digital interface simplifies wiring and data acquisition for microcontrollers
  • Low-power operation (1.8–3.6V DC) suitable for battery-powered IoT and portable devices
  • Compact PCB module (25 x 20 mm) with pre-soldered header pins for rapid prototyping

Out of stock

Description

The ENS160+AHT21 module combines a metal-oxide (MOX) based ENS160 gas sensor and a capacitive AHT21 sensor on a single PCB. The ENS160 provides digital outputs for equivalent CO2 (eCO2) and Total Volatile Organic Compounds (TVOC) concentrations, calculated from its internal algorithm and calibrated sensing array. The AHT21 delivers calibrated digital readings for ambient temperature and relative humidity with high stability.

Designed for 3.3V logic systems, the module operates from 1.8V to 3.6V DC and communicates exclusively via I2C, with selectable addresses. Its all-in-one design eliminates the need for separate signal conditioning circuits, providing a plug-and-play solution for environmental monitoring in controlled indoor environments.

Key Features

  • Dual-Sensor Integration: Combines air quality (ENS160) and climate (AHT21) sensing on one compact module.
  • Digital I2C Output: Provides calibrated, digital readings for all four parameters (eCO2, TVOC, Temp, RH) over a two-wire bus.
  • Wide Measurement Ranges: Covers eCO2 from 400 to 65,535 ppm and TVOC from 0 to 65,535 ppb.
  • High Accuracy Climate Data: AHT21 delivers temperature accuracy of ±0.3°C and humidity accuracy of ±2% RH.
  • Low Voltage Operation: Supports 1.8V to 3.6V DC, ideal for 3.3V logic microcontrollers and low-power applications.
  • Optimized Performance-to-Cost Ratio: Provides professional-grade environmental sensing in a single, easy-to-integrate module.
  • Fast Response Time: ENS160 sensor offers quick stabilization and response to changes in air quality.
  • Header Pin Ready: Comes with pre-included header pins for immediate breadboard or PCB integration.

Applications

  • Smart HVAC & Building Management: For demand-controlled ventilation based on real-time CO2 and VOC levels.
  • Indoor Air Quality Monitors: Integration into wall-mounted or portable devices for homes, offices, and classrooms.
  • Air Purifier & Ventilation Control: Provides feedback for automatic fan speed and filter life monitoring.
  • IoT Environmental Sensor Nodes: For wireless sensor networks monitoring climate and air quality in greenhouses or warehouses.
  • Prototyping & Educational Kits: For engineering projects involving environmental sensing with Arduino, Raspberry Pi, or ESP32 platforms.

Technical Specifications

Item TypeSensor Module
Model NumberENS160+AHT21
Gas SensorENS160 (MOX)
Climate SensorAHT21
Measured ParameterseCO2, TVOC, Temperature, Relative Humidity
eCO2 Range400 – 65,535 ppm
TVOC Range0 – 65,535 ppb
Temperature Range-40°C to +85°C (AHT21)
Temperature Accuracy±0.3°C
Humidity Range0% to 100% RH
Humidity Accuracy±2% RH
InterfaceI2C
Supply Voltage1.8 – 3.6 VDC
Module Dimensions (L x W)25 mm x 20 mm
Module Weight2 g

Frequently Asked Questions

What is the operating voltage range for the ENS160+AHT21 module?

The module operates from 1.8V to 3.6V DC. It is designed for 3.3V logic systems. Do not apply 5V directly to the VCC pin, as it may damage the sensors. If using a 5V microcontroller, a logic level converter for the I2C lines is recommended.

How do I connect and communicate with this sensor module?

The module uses a standard I2C interface. Connect VCC (1.8-3.6V), GND, SDA, and SCL to your microcontroller. The ENS160 and AHT21 have fixed I2C addresses. You will need to use specific libraries or datasheets to read the four data registers for eCO2, TVOC, temperature, and humidity.

What is the difference between eCO2 and actual CO2 measurement?

The ENS160 sensor calculates 'equivalent CO2' (eCO2) based on its detection of VOCs and other reducing gases, not via direct NDIR CO2 sensing. eCO2 is a derived value useful for indicating overall air freshness and ventilation needs, but it is not a direct measurement of atmospheric CO2 concentration.

Does the module require calibration or a burn-in period?

The digital sensors are factory calibrated. However, for optimal accuracy, especially for the ENS160 gas sensor, a recommended initial burn-in period of 48 hours in clean air is advised. The AHT21 temperature and humidity sensor is ready for use immediately upon power-up.

Package Includes

  • 1 x ENS160+AHT21 Air Quality and Temperature/Humidity Sensor Module
  • 1 x Header Pin Strip

Additional Information

Weight 0.002 kg
Dimensions 2.5 × 2 cm