Siemens QFA3160 Outdoor Humidity and Temperature Sensor – 0–100% RH, 0–10 V DC Outputs, Selectable Temperature Range

General
The Siemens QFA3160 is a combined relative humidity and temperature sensor from the Siemens Symaro range, designed for demanding HVAC, ventilation and building automation applications. It measures relative humidity and temperature simultaneously, providing separate active 0–10 V DC output signals for connection to compatible building management systems and HVAC controllers.

The sensor measures relative humidity from 0 to 100% RH and offers three selectable temperature measurement ranges: 0–50 °C, −35 to +35 °C and −40 to +70 °C. Its robust construction and reliable sensing performance make it suitable for outdoor air monitoring and demanding environmental measurement applications.

Features
- Combined relative humidity and temperature measurement.
- 0–100% RH humidity measuring range.
- ±2% RH humidity measurement accuracy.
- Separate active 0–10 V DC outputs for humidity and temperature.
- Three selectable temperature measurement ranges.
- Fast humidity response with a time constant below 20 seconds.
- Pt1000 temperature sensing element.
- Polycarbonate housing.
- IP65 housing protection.
- IP40 measuring-tip protection.
- Wall-mounted installation.
- Screw-terminal electrical connections.
- Suitable for HVAC, ventilation and building automation systems.
- Compatible with controllers accepting 0–10 V DC signals.

Key Specifications
- Brand: Siemens
- Product Family: Symaro
- Model: QFA3160
- Manufacturer Part Number: QFA3160
- Product Type: Outdoor Relative Humidity and Temperature Sensor
- Humidity Measuring Range: 0–100% RH
- Humidity Measurement Accuracy: ±2% RH
- Humidity Output Signal: Active 0–10 V DC
- Humidity Time Constant: Less than 20 seconds
- Temperature Sensing Element: Temperature-sensitive resistance element
- Temperature Measuring Ranges: 0–50 °C (factory setting), −35 to +35 °C, −40 to +70 °C
- Temperature Output Signal: Active 0–10 V DC
- Temperature Measurement Accuracy: ±0.3 °C at 23 °C
- Temperature Time Constant: Approximately 8.5 minutes
- Power Supply: 24 V AC ±20% or 13.5–35 V DC
- Power Consumption: Less than 1 VA
- Electrical Connection: Screw terminals
- Housing Material: Polycarbonate
- Housing Protection: IP65
- Measuring Tip Protection: IP40
- Protection Class: Class III
- Display: Not included
- Outdoor Mounting Accessory: AQF3100 (optional)