Siemens BPZ:QAC3161 Compact Temperature Sensor
The Siemens BPZ:QAC3161 compact temperature sensor is engineered for precise and reliable ambient temperature measurement within demanding industrial and HVAC environments. This active sensor stands out due to its robust construction, high accuracy, and seamless integration capabilities, making it an indispensable component for modern building automation and control systems. Its compact design, coupled with an IP65 rating, ensures durability and consistent performance even in challenging conditions. The sensor's output signal, a standard DC 0-10V, facilitates straightforward integration with a wide array of control platforms, offering flexibility for both new installations and upgrades. With a Pt1000 sensing element, the BPZ:QAC3161 guarantees stable and accurate temperature readings across its specified range of -50 to +50 °C, with a measurement accuracy of ±0.9 K. The device operates efficiently on AC 24V or DC 13.5-35V with minimal power consumption (≤ 1 VA), underscoring its energy efficiency.
Product Specifications
| Parameter | Specification |
| :---------------------- | :----------------------------------------------- |
| Product Number | BPZ:QAC3161 |
| Type | Outside/Room Temperature Sensor |
| Sensing Element | Pt1000 |
| Measuring Range | -50 to +50 °C |
| Measurement Accuracy | ±0.9 K at -50 to +50 °C |
| Output Signal | DC 0-10 V |
| Operating Voltage | AC 24 V or DC 13.5–35 V |
| Power Consumption | ≤ 1 VA |
| Time Constant | 1200 s (approx. 20 min) |
| Electrical Connection | Screw terminals |
| Ingress Protection | IP65 |
| Housing Material | Polycarbonate |
| Dimensions (W x H x D) | 80 x 88 x 39 mm (or 80 x 106 x 39 mm) |
| Operating Temperature | Up to +70 °C (maximum specified in some sources) |
| Certifications | RCM, EPD Type II, Test certificates, EU Declaration of Conformity |
Core Features & Market Positioning
The Siemens BPZ:QAC3161 distinguishes itself in the competitive temperature sensor market through its high precision, durability, and versatile application potential. Its Pt1000 sensing element offers superior accuracy and stability compared to less advanced technologies. The IP65 rating signifies robust protection against dust and water ingress, positioning it as a reliable choice for outdoor installations and environments prone to moisture or dust. Unlike basic sensors, the QAC3161 provides an active analog output signal (DC 0-10V), simplifying integration with sophisticated Building Management Systems (BMS) and Industrial IoT platforms. This feature positions it as a premium component for applications demanding precise, real-time temperature data for control and optimization. Its ability to function as both an outdoor and a high-end room sensor further enhances its market appeal, offering flexibility and cost-effectiveness for HVAC and building automation projects.
Key Application Scenarios
The Siemens BPZ:QAC3161 compact temperature sensor is ideally suited for a broad spectrum of applications within the heating, ventilation, and air conditioning (HVAC) sectors, as well as general industrial process control. Its primary role is as a reference sensor for outside temperature-compensated control systems, ensuring optimal building climate regulation by adjusting heating or cooling output based on ambient conditions. It also serves as a crucial measuring sensor for performance optimization, data logging, and direct integration into building automation and control systems. Beyond external measurements, the QAC3161 can function as a high-quality room sensor for acquiring indoor temperatures in commercial spaces, contributing to enhanced occupant comfort and energy efficiency. Its rugged design and IP65 protection make it suitable for industrial environments where accurate temperature monitoring is critical for process integrity and safety.
Practical System Integration Guidance
Integrating the Siemens BPZ:QAC3161 into existing or new systems is streamlined due to its standard DC 0-10V analog output and flexible power supply options. The sensor accepts either AC 24V or DC 13.5–35V, allowing for compatibility with various control system power configurations. Electrical connections are made via simple screw terminals, facilitating quick and secure wiring. For optimal performance and to prevent measurement errors, it's recommended to seal the cable conduit at the sensor to prevent air circulation issues. When laying signal cables, particularly for longer runs, using twisted pair cables is advisable to minimize electrical interference. The sensor's output signal directly correlates with the selected temperature range, and for specific applications, the measuring range can be selected on the sensor itself via a setting element with pins and a shorting plug, located inside the cover. Ensure proper transformer sizing for the safety extra-low voltage (SELV) supply, adhering to local safety regulations and observing permissible cable lengths to maintain signal integrity.
Operation and Risk Mitigation
The Siemens BPZ:QAC3161 is designed for reliable operation, but understanding potential issues is key to risk mitigation. A critical operational parameter is its time constant of 1200 seconds (approximately 20 minutes), indicating the time it takes to reach 63.2% of a temperature change, thus requiring patience for stable readings after significant ambient shifts. In the event of a fault, the output signal will typically drop to 0V (or 4mA for 4-20mA variants not applicable here) after 60 seconds, serving as an immediate indicator of an issue. To prevent damage, avoid painting over the sensor, as this can impede accurate readings. Installation should only be performed by qualified electricians, and local electrical installation standards must be observed. Devices with higher connected loads may require approval from the local grid operator. Proper wiring and adherence to the sensor's operating voltage range are essential to prevent component failure.
Scalability & Long-Term Value
The Siemens BPZ:QAC3161 offers considerable long-term value through its compatibility with evolving automation technologies and its role in a scalable infrastructure. Its standard DC 0-10V output is universally recognized and easily integrated into a wide range of Building Automation and Control Systems (BACS), as well as Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS). This interoperability ensures that the sensor can be incorporated into existing systems and readily upgraded as technology advances. Furthermore, its suitability for data acquisition makes it a valuable asset for implementing Industrial Internet of Things (IIoT) strategies. By providing real-time temperature data, the QAC3161 contributes to the data streams essential for analytics platforms like Siemens' Insights Hub, enabling predictive maintenance, process optimization, and enhanced operational efficiency. This integration capability future-proofs investments in environmental monitoring and control systems.
Frequently Asked Questions (FAQs)
What is the primary function of the Siemens BPZ:QAC3161?
The Siemens BPZ:QAC3161 is primarily an outdoor temperature sensor. It accurately measures ambient air temperature for use in HVAC systems. It can also function as a high-end room sensor.
This sensor is vital for temperature-compensated control strategies. It provides essential data for optimizing heating and cooling cycles. Its readings enable energy efficiency and consistent comfort levels.
The device is actively involved in building automation. It feeds data to control systems for performance monitoring and adjustments. Its integration capabilities are a key feature.
What is the measuring range and accuracy of the Siemens BPZ:QAC3161?
This sensor accurately measures temperatures within a range of -50 to +50 degrees Celsius. It provides a high level of precision for critical applications.
The measurement accuracy is specified as ±0.9 Kelvin within its operating range. This ensures reliable and consistent temperature data. It is suitable for demanding industrial uses.
This accuracy is achieved through its Pt1000 sensing element. This ensures stable performance and resistance to drift over time. The sensor offers dependable readings.
What type of output signal does the Siemens BPZ:QAC3161 provide?
The Siemens BPZ:QAC3161 provides a standard analog output signal of DC 0-10 Volts. This is a widely accepted industry standard.
This output signal is compatible with most building automation systems. It allows for easy integration into control panels and BMS. The signal represents the measured temperature.
The 0-10V signal facilitates straightforward data acquisition. It can be directly interfaced with PLCs and other control devices. This simplifies system design and implementation.
What are the power requirements for the Siemens BPZ:QAC3161?
The sensor can be powered by either AC 24 Volts or DC 13.5 to 35 Volts. This offers flexibility in system design and installation. It is compatible with common low-voltage power supplies.
It has a very low power consumption, typically less than 1 VA. This makes it an energy-efficient component for any system. Minimizing power draw is beneficial for large installations.
Proper transformer sizing is important for the SELV supply. Adhering to local safety regulations ensures safe and reliable operation. This also prevents potential damage.
What is the IP rating of the Siemens BPZ:QAC3161, and what does it mean?
The Siemens BPZ:QAC3161 has an IP65 rating. This signifies robust protection against environmental factors. It is designed for demanding applications.
An IP65 rating means the sensor is dust-tight. It also offers protection against low-pressure water jets. This makes it suitable for outdoor and harsh industrial environments.
This level of protection ensures longevity and reliable performance. It prevents ingress of contaminants that could affect sensor accuracy or damage internal components. This is crucial for outdoor installations.
Can the Siemens BPZ:QAC3161 be used as a room sensor?
Yes, the Siemens BPZ:QAC3161 can be utilized as a high-quality room sensor. It is designed for versatility in HVAC applications. It is not limited to just outdoor use.
This dual functionality makes it a cost-effective solution. It can serve multiple purposes within a building automation system. This reduces the need for separate sensors.
When used as a room sensor, it contributes to precise climate control. It helps maintain desired indoor temperatures for comfort. Its accuracy is beneficial for internal environments.
What is the time constant of the Siemens BPZ:QAC3161?
The Siemens BPZ:QAC3161 has a time constant of 1200 seconds. This equates to approximately 20 minutes. It indicates response speed.
This means it takes about 20 minutes for the sensor to reach 63.2% of a temperature change. It requires some time to stabilize after environmental shifts. Patience is key for accurate readings.
This longer time constant is typical for robust outdoor sensors. It helps to smooth out rapid fluctuations. This ensures a more stable and representative measurement.
How is the Siemens BPZ:QAC3161 installed?
Installation involves connecting electrical wiring via screw terminals. It supports both concealed and surface-run wiring options. The housing includes provisions for cable entry.
The sensor is designed for wall mounting. It should preferably be installed away from direct heat sources or drafts. Proper placement ensures accurate ambient temperature readings.
For outdoor installations, sealing the cable conduit is recommended. This prevents unwanted air circulation from affecting measurements. Adherence to mounting instructions is crucial.
What is the sensing element used in the Siemens BPZ:QAC3161?
The sensor employs a Pt1000 sensing element. This type of element is known for its accuracy and stability. It is a common choice for high-performance temperature measurement.
Pt1000 elements offer reliable temperature-to-resistance conversion. They provide consistent and repeatable readings over time. This ensures long-term performance of the sensor.
The use of a Pt1000 element contributes to the sensor's overall precision. It enables accurate data for control systems. This is critical for effective HVAC operation.
Can the Siemens BPZ:QAC3161 be integrated with IIoT platforms?
Yes, the Siemens BPZ:QAC3161 is well-suited for IIoT integration. Its standard 0-10V output is compatible with many data acquisition systems. It provides valuable real-time data.
This sensor can feed data into platforms like Siemens Insights Hub. This enables advanced analytics, monitoring, and optimization. It supports digital transformation initiatives.
By providing accurate environmental data, it enhances IIoT applications. It contributes to predictive maintenance and energy efficiency strategies. This makes it a future-proof component for smart buildings.
