Siemens QFA3100 Outdoor Relative Humidity Sensor – 0–100% RH, 0–10 V DC Output, ±2% Accuracy

General
The Siemens QFA3100 is a high-accuracy relative humidity sensor designed for HVAC systems and demanding environmental monitoring applications. It measures relative humidity across a range of 0 to 100% RH and provides an active 0–10 V DC output signal for connection to building automation and control systems.

With a specified accuracy of ±2% RH, the QFA3100 is suitable for applications requiring reliable humidity monitoring, including laboratories, pharmaceutical facilities, hospitals, indoor swimming pools, data centres and greenhouses. Its gasketed enclosure supports outdoor installation when used with the optional AQF3100 weather shield.

Features
- High-accuracy relative humidity measurement.
- 0–100% RH measuring range.
- ±2% RH measurement accuracy.
- Active 0–10 V DC output signal.
- Suitable for HVAC and building automation systems.
- Designed for demanding environmental monitoring applications.
- Gasketed enclosure for environmental protection.
- Suitable for outdoor installation with optional AQF3100 weather shield.
- Compact design for wall-mounted installation.
- Low power consumption.
- Suitable for laboratories, hospitals, pharmaceutical facilities, swimming pools and greenhouses.

Key Specifications
- Brand: Siemens
- Model: QFA3100
- Manufacturer Part Number: QFA3100
- Product Type: Relative Humidity Sensor
- Measurement Parameter: Relative Humidity
- Humidity Measuring Range: 0–100% RH
- Measurement Accuracy: ±2% RH
- Output Signal: Active 0–10 V DC
- Output Characteristic: Linear, proportional to relative humidity
- Temperature Effect: Less than 0.1% per °C
- Response Time: Less than 20 seconds
- Power Supply: 24 V AC or 13.5–35 V DC
- Power Consumption: Less than 1 VA
- Electrical Connection: Screw terminals
- Housing Material: Polycarbonate
- Installation: Wall-mounted
- Outdoor Installation: With optional AQF3100 weather shield
- Compliance: CE and UL listed