Vaisala HMP110

The Vaisala HMP110 is a robust sensor designed for accurate measurement of humidity and temperature.  The HMP110 uses a thin-film capacitive sensor for measuring relative humidity (RH). When the air's humidity changes, the dielectric constant of the sensor's polymer layer changes, altering its capacitance.  This change in capacitance is converted into an electrical signal, which is processed to give an RH reading.  The temperature is measured using a Platinum Resistance Thermometer (PRT), typically a PT1000 sensor. The PRT sensor measures temperature based on the principle that the electrical resistance of platinum changes with temperature. The change in resistance is accurately converted into a temperature reading. The processed signals are then output as either analog (voltage or current) or digital signals (RS-485 Modbus RTU).

Features:

 Measurement Range:

• Humidity: 0 to 100% RH
• Temperature: -40 to +80°C (-40 to +176°F)

Output:

• Analog output options (0-1 V DC, 0-2.5V DC,0-5 V DC, 1-5V DC, 4-20 mA)
• Digital output via RS-485 (Modbus RTU)

Power Supply:

• Voltage: 5 to 28 VDC( 1V/2.5V Output)

Design:

• Compact and robust
• Suitable for harsh environments
• Filter options to protect the sensor.

Applications:

 HVAC Systems:

• Ensures optimal indoor air quality and energy efficiency by monitoring and controlling humidity and temperature.

Environmental Monitoring:

• Used in weather stations, greenhouses, and agricultural applications to monitor and control environmental conditions.

Industrial Processes:

• Monitors conditions in processes where precise humidity and temperature control are crucial, such as in pharmaceutical manufacturing, food processing, and electronics production.

Data Centers:

• Maintains optimal conditions for servers and other equipment, preventing overheating and condensation.