SKU: SENS-0239
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Sensirion SEN55-SDN-T Environmental Sensor PM2.5, CO2, VOC, Temp, RH - I2C Interface

₹5,879.00 (Inclusive of all taxes)
Out of Stock

The Sensirion SEN55-SDN-T is a fully integrated environmental sensor module providing simultaneous digital measurements of particulate matter (PM1.0 to PM10), volatile organic compounds (VOC), COâ‚‚ equivalent, temperature, and relative humidity via a single I2C interface. It is designed for seamless integration into 5V or 3.3V systems including Arduino, Raspberry Pi, ESP32, and industrial air quality monitoring platforms.

Features

  • All-in-one sensing of PM1.0, PM2.5, PM4, PM10, VOC, COâ‚‚ (algorithmic), temperature, and relative humidity.
  • Fast 1-second sampling rate with a startup time as low as 8 seconds, depending on Particle concentration.
  • Low acoustic noise emission of 24 dB(A) at 0.2 meters for quiet operation in sensitive environments.
  • Robust digital I2C interface with 3.3V logic compatibility, powered from a 4.5V to 5.5V DC supply.
  • Designed for long-term reliability with a projected operational lifespan exceeding 10 years under continuous use.

Out of stock

Description

The SEN55-SDN-T integrates Sensirion’s proven laser scattering technology for particulate matter detection with advanced metal-oxide (MOX) VOC sensing and calibrated SHT40-based temperature and humidity measurement. The COâ‚‚ equivalent value is calculated via a proprietary algorithm using the measured VOC and humidity data. This multi-parameter approach provides a comprehensive environmental profile from a single, compact device.

Engineered for industrial-grade durability, the module features robust EMC and ESD protection compliant with IEC standards, ensuring stable operation in electrically noisy environments. Its fast response and high accuracy, calibrated against reference instruments like the TSI DustTrakâ„¢, make it suitable for demanding air quality monitoring and control applications where data integrity is critical.

Key Features

  • Comprehensive Multi-Parameter Sensing: Simultaneously outputs precise data for six key environmental indicators from a single integrated module.
  • High Accuracy & Calibration: PM measurements are factory-calibrated against industry-standard reference equipment for reliable data.
  • Optimized Performance-to-Cost Ratio: Consolidates multiple sensor functions into one high-value build, reducing system complexity and footprint.
  • Durable Construction for Longevity: Designed and tested for minimal drift and a service life exceeding a decade in 24/7 operation.
  • Quiet Operation: Features a very low acoustic noise output of 24 dB(A), ideal for office, residential, or healthcare settings.
  • Digital Simplicity: Provides fully digital, pre-processed data via a standard I2C interface, simplifying integration and firmware development.
  • Robust Environmental Immunity: Built-in protection against electromagnetic interference (EMI) and electrostatic discharge (ESD) per IEC standards.

Applications

  • Demanding Indoor Air Quality (IAQ) Monitoring: Integration into HVAC control systems, smart building management platforms, and air purifiers for real-time multi-parameter assessment.
  • Industrial Environmental Monitoring: Deployment in factories, cleanrooms, and laboratories to monitor particulate and VOC levels for process control and worker safety.
  • Advanced IoT and Smart Home Devices: Core sensing unit for high-end environmental monitors, weather stations, and wellness tracking systems requiring comprehensive data.
  • Ventilation Control & Demand-Controlled Ventilation (DCV): Providing the necessary COâ‚‚ (eq.), VOC, and PM data to dynamically optimize fresh air intake in commercial buildings.
  • Research & Development Platforms: Used in academic and product development projects for environmental sensing due to its high accuracy and digital interface.

Technical Specifications

Manufacturer Part NumberSEN55-SDN-T
Measurement ParametersPM1.0, PM2.5, PM4, PM10, VOC, COâ‚‚ (eq.), Temperature, Relative Humidity
Supply Voltage4.5 V to 5.5 V DC
Logic Voltage3.3 V compatible
Communication InterfaceI2C
Average Operating Current6.8 mA to 8 mA
Sampling Rate1 second
Startup Time8 to 30 seconds
Acoustic Noise24 dB(A) at 0.2 m
Operating Temperature Range-10 °C to +60 °C
Projected Lifespan> 10 years (continuous operation)
Dimensions (L x W)53 mm x 43 mm
WeightApprox. 38 g

Frequently Asked Questions

What is the power supply requirement for the SEN55-SDN-T sensor?

The module requires a DC supply voltage between 4.5V and 5.5V. Its I2C communication lines are 3.3V logic compatible, allowing direct connection to most microcontrollers like Arduino, Raspberry Pi, and ESP32 without level shifting.

How is the CO2 measurement derived by this sensor?

The SEN55-SDN-T does not have a dedicated NDIR CO2 sensor. It calculates a CO2 equivalent value (COâ‚‚ eq.) using a proprietary algorithm based on the measured VOC concentration and relative humidity. This provides a reliable indicator of air freshness and occupancy for ventilation control.

What is the sampling rate and startup time for this environmental sensor?

The sensor provides new data every second (1 Hz sampling rate). The startup time from power-on to valid data ranges from approximately 8 seconds to 30 seconds, depending on the initial Particle concentration in the environment.

Is this sensor suitable for outdoor use or harsh environments?

While robust against ESD/EMI, the SEN55-SDN-T has an operating temperature range of -10°C to +60°C and is primarily designed for indoor air quality applications. It is not rated for waterproofing (IP rating), so exposure to direct rain, condensation, or extreme conditions should be avoided.

Does the sensor require calibration, and what is its expected lifespan?

The sensor is factory-calibrated for particulate matter, VOC, temperature, and humidity, requiring no user calibration. Sensirion designs the module for long-term stability, with a projected operational lifespan exceeding 10 years under continuous 24/7 operation with minimal drift.

Package Includes

  • 1 x Sensirion SEN55-SDN-T Environmental Sensor Module

Additional Information

Weight 0.038 kg
Dimensions 5.3 × 4.3 cm