Siemens Room Sensor | QFA3171 / BPZ:QFA3171

This sensor is a wall-mounted temperature and humidity measurement device designed for precise environmental monitoring in a variety of settings. With a robust construction featuring a housing that meets the IP65 rating, it ensures reliability even in harsh conditions. The dimensions of the sensor are 144mm in height, 80mm in length, and 80mm in width, providing a compact yet efficient solution for HVAC applications.

• Detects temperature between -40°C and +70°C for diverse environments

• Provides accurate relative humidity readings across 0 to 100%

• Outputs signals as DC 0 to 10V or 4 to 20mA for flexibility

• Features screw terminal connections for easy installation

• Equipped with an optional LCD display for real-time measurement

• Complies with IP65 standards for durability against water and dust

• Utilised in laboratories for essential climate control functions

• Ideal for hospitals needing controlled humidity and temperature conditions

• Effective in indoor swimming pools to maintain optimal air quality

• Suitable for computer and electronics facilities requiring accurate humidity monitoring

• Utilised in greenhouses for optimal plant growing conditions

The IP65 rating indicates that the sensor is protected against dust and low-pressure water jets, allowing it to function reliably in challenging environments, including outdoor applications.

The sensor’s dual output options of DC 0…10V and 4…20mA enable seamless integration with existing building management systems and HVAC controls for enhanced functionality.

For best performance, it should be mounted indoors at about 1.5m from the ground, avoiding direct sunlight, heat sources, and areas with poor air circulation.

The measuring accuracy is affected by temperature; at 23°C, humidity accuracy is ±2% r.h., and the temperature sensor has an accuracy 3 K to ±0.8 K depending on the specific type used.

This sensor features screw terminal connections, and its compact design allows for straightforward wall mounting, making installation quick and efficient.