Siemens BPZ:QAE2174.010 Integrated Temperature Sensor with Display
Siemens BPZ:QAE2174.010 Integrated Temperature Sensor with Display
The Siemens BPZ:QAE2174.010 stands as a robust solution for precise temperature monitoring in industrial and HVAC applications. This immersion temperature sensor offers a reliable 4-20 mA output signal, operating on a DC 13.5-35 V supply, and features a 100 mm immersion length constructed from durable stainless steel. Its measuring range spans from -10°C to 120°C, with an accuracy of ±1 K at 0-70°C. The sensor boasts an IP54 protection rating, ensuring resilience in demanding environments.
Product Specifications
| Parameter | Specification |
| :-------------------- | :------------------------------------------ |
| Model | BPZ:QAE2174.010 |
| Type | Immersion Temperature Sensor |
| Output Signal | DC 4-20 mA |
| Operating Voltage | DC 13.5–35 V |
| Measuring Range | -10°C to 120°C |
| Accuracy | ±1 K (at 0–70°C), ±1.4 K (at -10–120°C) |
| Immersion Length | 100 mm |
| Material | Stainless steel (immersion rod) |
| Protection Rating | IP54 |
| Connection Thread | G ½" |
| Max. Operating Pressure | PN 10 |
| Time Constant | 30 s (with protection pocket) |
| Power Consumption | 1 VA |
Core Features & Market Positioning
The Siemens BPZ:QAE2174.010 is engineered for high-precision temperature measurement, making it a preferred choice in applications demanding accuracy and reliability. Its 4-20 mA output signal is a standard in industrial automation, ensuring broad compatibility with control systems and PLCs. The sensor's robust stainless steel construction and IP54 rating make it suitable for challenging environments where resistance to dust and water ingress is critical. Unlike simpler sensors, the QAE2174.010 offers a versatile measuring range and configurable settings for different temperature spans, providing flexibility for various applications.
Key Application Scenarios
This immersion temperature sensor is ideally suited for monitoring temperatures in liquid media within heating, ventilation, and air conditioning (HVAC) systems. Common applications include regulating flow temperatures directly after pumps or mixing valves in heating circuits, as well as limiting return temperatures. It is also deployed in domestic hot water (DHW) temperature regulation and can be used in various industrial piping and tank systems where precise temperature control is essential.
Practical System Integration Guidance
The Siemens BPZ:QAE2174.010 facilitates straightforward integration into existing systems. Fixing is achieved using a protection pocket or a compression fitting; it's important to note that a protection pocket is not included as standard. When using a compression fitting like the AQE2102, a nominal pressure of PN 16 is supported. Electrical connections are made via screw terminals, and the sensor requires a DC 13.5-35 V operating voltage. For optimal performance and to mitigate electrical interference, twisted pair cables are recommended for both secondary supply and signal lines. The sensor's internal setting element, featuring pins and a shorting plug, allows for the selection of specific measuring ranges, such as -10...+120 °C (factory setting), 0...100 °C, or 0...70 °C.
Operation and Risk Mitigation
Operating the Siemens BPZ:QAE2174.010 involves ensuring proper installation and connection to a compatible control system. The sensor's design prioritizes safety and reliability. In the event of a fault, the output signal is designed to transition to a defined state (e.g., 0 V or 4 mA after 60 seconds) to alert the system. Users should always refer to the product's technical documentation for detailed operating instructions and troubleshooting guidance. While the sensor itself is robust, maintaining the integrity of the protection pocket or compression fitting is crucial for preventing medium ingress and ensuring accurate readings.
Scalability & Long-Term Value
The Siemens BPZ:QAE2174.010 integrates seamlessly with a wide array of controllers and automation systems capable of processing 4-20 mA signals. This inherent compatibility ensures that the sensor can be a long-term component in evolving industrial processes. While specific upgrade paths are not inherent to the sensor itself, its reliable performance and standard output signal contribute to the overall stability and efficiency of the systems it serves. Its robust build quality suggests a long operational lifespan, minimizing the need for frequent replacements and contributing to lower total cost of ownership.
Frequently Asked Questions
Q1: How is the Siemens BPZ:QAE2174.010 temperature sensor installed?
Installation involves using a protection pocket or a compression fitting. The sensor itself does not typically include a protection pocket.
A compression fitting, such as the AQE2102, allows for higher nominal pressures up to PN 16. Ensure the chosen fixing method is suitable for the system's pressure and medium.
Electrical connections are made via screw terminals. Twisted pair cables are recommended for signal integrity.
Q2: What is the temperature measuring range of the Siemens BPZ:QAE2174.010?
The sensor has a standard measuring range of -10°C to 120°C.
This range can be adjusted or selected using the internal setting element with a shorting plug.
Other selectable ranges include 0-100°C and 0-70°C.
Q3: What type of output signal does the Siemens BPZ:QAE2174.010 provide?
The QAE2174.010 provides a standard 4-20 mA analog output signal.
This current loop signal is widely used in industrial automation for its robustness and immunity to electrical noise.
This signal is compatible with any controller or data acquisition system capable of processing a 4-20 mA input.
Q4: What are the key advantages of using the Siemens BPZ:QAE2174.010?
It offers high accuracy and reliable performance in demanding conditions.
The sensor features a durable stainless steel construction and IP54 rating for protection against environmental factors.
Its standard 4-20 mA output ensures broad compatibility with various control systems.
Q5: What is the power supply requirement for the Siemens BPZ:QAE2174.010?
The sensor operates on a DC voltage supply ranging from 13.5 V to 35 V.
This voltage range is typical for industrial control applications.
A transformer for safety extra-low voltage (SELV) with separate windings is recommended for powering the sensor.
Q6: Can the Siemens BPZ:QAE2174.010 be used outdoors?
While the sensor has an IP54 rating, offering protection against dust and splashing water, outdoor use should consider additional environmental factors.
Extended exposure to extreme weather conditions might require additional protective measures for long-term reliability.
Always consult the environmental specifications and installation guidelines for the intended application.
Q7: Does the Siemens BPZ:QAE2174.010 include a protection pocket?
No, a protection pocket is not included as standard with the Siemens BPZ:QAE2174.010.
Protection pockets are required for certain installation methods and for enhanced durability.
Users must procure a suitable protection pocket or compression fitting separately.
Q8: What is the immersion length of the Siemens BPZ:QAE2174.010?
The immersion length of this sensor is 100 mm.
This length is suitable for insertion into standard industrial pipes and tanks.
Longer immersion lengths are available in other models, such as the QAE2174.015 (150 mm).
Q9: How accurate is the Siemens BPZ:QAE2174.010 sensor?
The sensor provides an accuracy of ±1 K within the 0°C to 70°C range.
At the wider temperature range of -10°C to 120°C, the accuracy is ±1.4 K.
These accuracy levels are suitable for most industrial and HVAC control applications.
Q10: What are the dimensions of the Siemens BPZ:QAE2174.010?
The external dimensions of the sensor housing are approximately 80 x 88 x 39 mm.
These dimensions allow for relatively compact integration into control panels or junction boxes.
The immersion rod's dimensions correspond to its 100 mm length.
