HVAC Sensor

Categories:
Metering and Instrumentation

Description

An HVAC Sensor is a critical component in heating, ventilation, and air conditioning systems, designed to monitor and regulate indoor environmental conditions for comfort, safety, and energy efficiency. These sensors provide real-time data to building management systems (BMS), programmable logic controllers (PLC), or standalone controllers, allowing automated control of temperature, airflow, humidity, and air quality.
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Specifications

  • Sensor Types:

    • Temperature sensors (RTD, thermistor)

    • Humidity sensors (capacitive, resistive)

    • Pressure sensors (gauge, differential)

    • CO₂ sensors (NDIR – Non-Dispersive Infrared)

    • VOC sensors (metal oxide semiconductor)

  • Measurement Ranges:

    • Temperature: -40°C to +125°C (depending on model)

    • Relative Humidity: 0% to 100% RH

    • Pressure: 0 to 5000 Pa (for duct pressure), or up to 16 bar (for refrigerant)

    • CO₂: 0 to 5000 ppm (parts per million)

    • VOC: 0 to 1000 ppb (parts per billion)

  • Output Signals:

    • Analog: 4–20 mA, 0–10 V, 1–5 V

    • Digital: RS485 (Modbus), BACnet MS/TP, I²C, or wireless (LoRa, Zigbee)

  • Accuracy:

    • Temperature: ±0.2°C to ±0.5°C

    • Humidity: ±2% to ±5% RH

    • CO₂: ±50 ppm or ±3% of reading

  • Power Supply:

    • 12–24V AC/DC or battery-powered for wireless models

  • Installation:

    • Wall-mounted, duct-mounted, ceiling-mounted, or embedded in equipment

  • Protection Rating:

    • IP20 for indoor use

    • IP65/IP66 for industrial or outdoor applications

  • Typical Applications:

    • Office buildings, malls, and hospitals (for comfort and energy efficiency)

    • Cleanrooms and laboratories (for humidity and air quality control)

    • Data centers (temperature and airflow monitoring)

    • Residential HVAC automation

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