HTW-211 High-precision Temperature Humidity Sensor

Product Overview:

The HTW-211 is a high-precision temperature and humidity sensor commonly used in environmental monitoring, industrial control, and smart home scenarios. Employing advanced sensing technology combined with digital signal processing, it delivers real-time calibrated temperature and humidity data, featuring fast response and high stability.

Technical Parameters:

1. Measurement Range:
   • Temperature: -40°C ~ 80°C (some models up to -50°C ~ 125°C)
   • Humidity: 0%RH ~ 100%RH (non-condensing)
2. Accuracy:
   • Temperature: ±0.5°C (at 25°C)
   • Humidity: ±3%RH (at 20% ~ 80%RH)
3. Output Signals:
   • Digital interfaces: I²C, SPI, or UART (model-dependent)
   • Analog outputs: 0~5V, 4~20mA (supported by some models)
4. Supply Voltage: 3.3V ~ 5V (DC)
5. Power Consumption:
   • Measurement mode: Typical 5mA
   • Standby mode: Typical 10μA
6. Response Time:
   • Temperature: <10 seconds
   • Humidity: <5 seconds (at 1m/s airflow)
7. Package:
   • Plastic housing (IP65 protection) with metal mesh for dust filtration
   • Pin configuration: 4 pins (VCC, GND, DATA, CLK)

Product Features:

1. Wide-Range Adaptability: Supports -40°C ~ 80°C temperature and full humidity range, suitable for harsh environments (e.g., cold storage, greenhouses).
2. High Reliability:
   • Built-in anti-condensation algorithm for quick recovery in dew conditions
   • Corrosion-resistant coating to withstand chemical gases (e.g., SO₂, NO₂)
3. Low Power Design: Enables sleep mode, ideal for battery-powered wireless sensor nodes (e.g., LoRa, NB-IoT devices).
4. Easy Integration:
   • Standard digital interfaces compatible with mainstream MCUs (e.g., Arduino, STM32)
   • Open-source drivers and sample codes available (e.g., Python, C)
5. Long-Term Stability: Annual drift <0.5°C (temperature) and <1%RH (humidity), reducing calibration frequency.

Application Fields:

1. Industrial & Agricultural:
   • Workshop climate monitoring, cold chain logistics, agricultural greenhouse automation
2. Smart Home:
   • Smart AC/humidifier (interactive control), indoor air quality monitoring (e.g., with formaldehyde detectors)
3. Medical & Research:
   • Lab incubators, pharmaceutical storage cabinets, weather station data collection
4. Building Automation:
   • HVAC energy-saving control, server room humidity/temperature alert, intelligent building environment management
5. Consumer Electronics:
   • Wearables (e.g., sports watch environmental monitoring), air purifier linkage modules

Installation & Precautions:

1. Mounting Methods:
   • Wall-mounted, duct-inserted, or direct PCB soldering (refer to specific model specs)
   • Avoid heat sources (e.g., heaters, motors) and water, prevent direct sunlight
2. Electrical Connections:
   • I²C interface requires 4.7kΩ pull-up resistors, communication distance ≤20m
   • Analog models need 250Ω precision resistors for voltage signal conversion
3. Environmental Requirements:
   • Avoid strong acids/alkalis or high-dust environments
   • Long-term storage: -40°C ~ 60°C, humidity <80%RH (non-condensing)

Selection Guide: