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SmartElex HTU21D-F Temperature and Humidity Sensor with Breakout Board

SmartElex HTU21D-F Temperature and Humidity Sensor with Breakout Board

₹755.00Price
🔹 Overview
The SmartElex HTU21D-F Sensor Breakout is a digital temperature and relative humidity sensor module based on the HTU21D-F CMOSens® sensor.
  • Measures:
    • Temperature
    • Relative Humidity
  • Provides fully calibrated digital output via I2C
  • Designed for accurate environmental sensing in embedded systems
👉 Acts as a modern replacement for older sensors like SHT15
🔹 Working Principle
  • Humidity sensing: Capacitive polymer element changes with moisture
  • Temperature sensing: Integrated bandgap sensor
Internal process:
  • Signal conditioning
  • High-resolution ADC conversion
  • Digital compensation
👉 Outputs linear, calibrated digital data directly (no external calibration required)
🔹 Measurement Characteristics
🌡️ Temperature
  • Range: –30°C to +90°C
  • Accuracy: ±1°C (typical)
💧 Humidity
  • Range: 0% to 100% RH
  • Optimized Accuracy Range: 5% to 95% RH
  • Accuracy: ±2% RH (typical)
🔹 Resolution & Performance
  • High-resolution digital output (12–14 bit typical depending on mode)
  • Fast response with stable readings
  • Good long-term stability
🔹 Electrical Characteristics
  • Operating Voltage (sensor): ~1.5V – 3.6V
  • Breakout Support: 3.3V / 5V compatible (with regulator & level shifting)
🔋 Power Consumption
  • Very low (suitable for battery-powered devices)
🔹 Communication Interface
  • Protocol: I2C (digital)
  • I2C Address: 0x40
👉 Simple 2-wire communication:
  • SDA (data)
  • SCL (clock)
🔹 Breakout Board Features
  • Built-in:
    • 3.3V voltage regulator
    • I2C level shifting circuit
  • Compact PCB (~18 × 16 mm)
  • Optional:
    • PTFE filter (protects sensor from dust/moisture)
👉 Ensures safe and easy interfacing with 3.3V & 5V systems
🔹 Internal Architecture
  • Capacitive humidity sensing element
  • Temperature sensor
  • ADC (high resolution)
  • Digital signal processor
  • Calibration memory
🔹 Functional Features
  • Factory calibrated and linearized output
  • Temperature compensation for humidity readings
  • Low noise measurement
  • Stable long-term operation
🔹 Functional Behavior
  • Measures:
    • Ambient temperature
    • Relative humidity
  • Outputs:
    • Digital values via I2C
  • Supports:
    • Periodic measurement
    • On-demand measurement
🔹 Key Technical Features
  • High accuracy (±2% RH, ±1°C)
  • Digital I2C interface
  • Fully calibrated output
  • Compact breakout design
  • Wide humidity range (0–100%)
  • Built-in regulator & level shifting
  • Low power consumption
🔹 Advantages
  • Better accuracy than basic sensors (e.g., DHT series)
  • Easy integration via I2C
  • Stable and reliable readings
  • Small size and low power
  • Suitable for IoT and embedded systems
🔹 Limitations
  • Not designed for extreme industrial environments
  • Requires protection in:
    • Condensing environments
    • Dust-heavy areas
  • Slightly lower accuracy than newer SHT4x series
🔹 Applications
  • Weather monitoring systems
  • Indoor air quality monitoring
  • IoT environmental sensing
  • Smart home automation
  • Data logging systems
  • HVAC monitoring
🔹 Technical Summary
The HTU21D-F breakout is a reliable digital temperature & humidity sensor module that:
  • Provides accurate, calibrated environmental data
  • Uses I2C for simple integration
  • Offers a good balance of accuracy, cost, and power efficiency
👉 Best suited for:
  • General-purpose environmental sensing
  • IoT and embedded applications
  • Moderate accuracy requirements
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