🔷 What is a Humidity Sensor?
A humidity sensor measures the amount of water vapor present in the air. It is typically expressed as Relative Humidity (RH %), which indicates how much moisture is present compared to the maximum possible at a given temperature.
Environmental Monitoring Process Control HVAC IoT Ready⚙️ Working Principle
Humidity sensors commonly work on capacitive or resistive principles.
- Capacitive Type: Measures change in dielectric constant due to moisture absorption
- Resistive Type: Measures change in electrical resistance as humidity varies
- Thermal Type: Measures change in thermal conductivity of air
Capacitive sensors are most widely used due to their stability and accuracy.
📊 Types of Humidity Sensors
- Capacitive RH Sensors – Most common, high reliability
- Resistive Humidity Sensors – Cost-effective
- Thermal Conductivity Sensors – Specialized applications
📡 Output Signals
- Analog Output: 0–5V / 4–20mA
- Digital Output: I2C / UART
- Industrial Protocols: RS485 (Modbus)
- Wireless: 4G LTE, LoRa, WiFi (via IoT Gateway)
📈 Measured Parameters
- Relative Humidity (RH %)
- Temperature (very commonly integrated)
- Dew Point (derived parameter)
🏭 Industrial Applications
- HVAC Systems & Clean Rooms
- Pharmaceutical Manufacturing
- Food Processing & Storage
- Cold Chain Monitoring
- Textile Industry
- Greenhouses & Agriculture
- Warehouses & Logistics
🌐 IoT Integration
- Real-time humidity monitoring dashboard
- Threshold alerts (high/low humidity)
- HVAC automation control
- Historical data logging & trend analysis
- Integration with BMS / SCADA
🚀 Hexitronics Advantage
- Multi-parameter sensing (Temp + RH)
- Wireless IoT integration
- Secure cloud monitoring (TLS enabled)
- Energy-efficient battery operation
- Scalable deployments