The **HTS-11-R/Q** is a high-performance **Humidity and Temperature Sensor** module, commonly used in industrial automation, HVAC systems, and meteorological equipment. It is designed for high accuracy and stability over long-term operation. --- ### 1. Key Technical Specifications The "R/Q" suffix usually refers to the specific interface or package type (often resistive or frequency-based depending on the specific manufacturer variant, though most modern versions are digital). | Parameter | Range / Value | | :--- | :--- | | **Operating Voltage** | 3.3V to 5.5V DC | | **Humidity Range** | 0% to 100% RH | | **Temperature Range** | -40°C to +85°C | | **Humidity Accuracy** | ±2% to ±3% RH | | **Temperature Accuracy** | ±0.3°C to ±0.5°C | | **Interface** | I2C (Standard) or Analog (Optional) | | **Response Time** | < 8 seconds (tau 63%) | --- ### 2. Internal Electronic Components The device is an integrated system-on-chip (SoC) style module. Its internal architecture consists of: * **Capacitive Humidity Sensor:** A polymer thin-film capacitor that changes its dielectric constant based on the surrounding moisture levels. * **PT1000 / NTC Thermistor:** A high-precision resistive element used to measure thermal energy. * **Signal Conditioning ASIC:** This integrated circuit converts the raw analog signals from the sensors into a linearized, digital format. * **EEPROM:** Stores calibration coefficients determined during factory testing to ensure interchangeable accuracy between units. --- ### 3. Pin Configuration Most HTS-11 series modules utilize a 4-pin or 6-pin layout. Below is the standard 4-pin digital configuration: | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **VDD** | Power Supply (3.3V - 5V) | | 2 | **SDA** | Serial Data (I2C) | | 3 | **GND** | Ground (0V) | | 4 | **SCL** | Serial Clock (I2C) | --- ### 4. Implementation Example (Python) If using an I2C-enabled microcontroller (like a Raspberry Pi or ESP32), the communication logic follows this structure: ```python import smbus import time # Standard I2C address for HTS series HTS_ADDR = 0x5F def read_sensor(): bus = smbus.SMBus(1) # Trigger measurement command bus.write_byte(HTS_ADDR, 0xAC) time.sleep(0.1) # Read 6 bytes of data (Humidity + Temperature) data = bus.read_i2c_block_data(HTS_ADDR, 0x00, 6) return data print("Accessing HTS-11-R/Q...") ``` --- ### 5. Application Precautions 1. **Chemical Exposure:** Avoid exposing the sensor to high concentrations of chemical vapors (like Ethanol or Acetone), as they can contaminate the polymer layer. 2. **Mounting:** Ensure the sensor is placed away from heat-generating components (CPUs, Voltage Regulators) to prevent skewed temperature readings. 3. **Filtering:** In dusty environments, a sintered metal or PTFE filter is recommended to protect the sensing element.