Siemens BPZ:QAE26.95 Process Control Temperature Sensor

Siemens BPZ:QAE26.95 Process Control Temperature Sensor: Precision and Reliability for Demanding Environments

The Siemens BPZ:QAE26.95, an immersion temperature sensor, stands out in industrial process control and building automation for its robust design and accurate temperature measurement capabilities. This sensor is engineered for direct immersion applications, ensuring reliable data acquisition in a wide operational range. Its key advantages include a broad temperature measurement spectrum from -50 to 180°C, a durable stainless steel immersion stem, and compatibility with standard industrial interfaces. The LG-Ni1000 sensing element provides high precision, making the BPZ:QAE26.95 an ideal choice for critical monitoring and control loops where temperature stability is paramount.

#Product Specifications

| Feature                 | Specification                                     |

| :---------------------- | :------------------------------------------------ |

| Article Number          | BPZ:QAE26.95                                      |

| Model                   | QAE26.95                                          |

| Sensing Element         | LG-Ni1000                                         |

| Measuring Range         | -50…180 °C                                        |

| Immersion Stem Diameter | 4 mm                                              |

| Immersion Stem Length   | 465 mm (15…465 mm effective immersion length)     |

| Material (Immersion Pocket) | Stainless Steel                                   |

| Connection Thread       | R ¼"                                              |

| Pressure Class (PN)     | PN 40                                             |

| Cable Length            | 2 m                                               |

| Connection Cable Material | Silicone                                          |

| Time Constant           | <2.5 s                                            |

| Measurement Accuracy    | ±1.75 K at -50…180 °C                             |

| Ingress Protection      | IP64 (referenced in some variations)              |

| Country of Origin       | Switzerland                                       |

| RoHS Directive Compliance | Since 13.07.2020                                  |

| Lifecycle Status        | Active Product                                    |

#Core Features & Market Positioning

The Siemens BPZ:QAE26.95 is positioned as a high-performance, direct-immersion temperature sensor designed for demanding industrial and HVAC applications. Its core strength lies in the reliable LG-Ni1000 sensing element, which offers excellent accuracy and stability across its extensive temperature range of -50 to 180°C. The robust stainless steel immersion stem, available in lengths up to 465 mm, is built to withstand challenging media and pressures up to PN40. This combination of precision, durability, and industrial-grade construction differentiates the BPZ:QAE26.95 from general-purpose sensors, making it a preferred choice for applications where consistent and accurate temperature data is critical for process efficiency and safety.

#Key Application Scenarios

The Siemens BPZ:QAE26.95 finds its primary utility in a variety of industrial and building automation systems where precise liquid temperature monitoring is essential. Common applications include its use in HVAC systems for monitoring supply and return water temperatures, in industrial pipelines for process temperature control, and within tanks for maintaining optimal fluid conditions. Its direct immersion design and robust construction make it suitable for environments requiring a sensor that can be directly inserted into the medium being measured, offering a reliable solution for controlling heating, ventilation, and cooling processes efficiently. It is also valuable in systems that require monitoring for safety limits or optimal operational parameters.

#Practical System Integration Guidance

Integrating the Siemens BPZ:QAE26.95 into existing systems is straightforward due to its standard R ¼" connection thread and pre-wired 2-meter silicone cable. Installation typically involves welding a T-junction or a threaded fitting directly into the pipe or tank, ensuring the immersion stem faces the direction of flow for accurate readings. The immersion length must be at least 15 mm to ensure proper temperature acquisition along the entire stem. For extending the connection cable beyond the standard 2 meters, a branching box should be utilized. The sensor's passive nature means it requires integration with compatible control systems or temperature transmitters that can interpret the LG-Ni1000 signal.

#Operation and Risk Mitigation

Operating the Siemens BPZ:QAE26.95 involves ensuring its correct installation and connection to a suitable monitoring or control system. As a passive sensor, it does not generate its own power but provides a resistance output that varies with temperature. Potential risks during operation primarily relate to improper installation, such as inadequate immersion depth or incorrect threading, which can lead to inaccurate readings or potential leaks. To mitigate these risks, adherence to the manufacturer's mounting instructions and ensuring the R ¼" thread is properly sealed is crucial. Regular inspection of the immersion stem for corrosion or damage, especially in aggressive media, is also recommended for sustained performance and safety.

#Scalability & Long-Term Value

The Siemens BPZ:QAE26.95 offers long-term value through its robust construction and Siemens' commitment to product lifecycle support, with the QAE26.95 currently listed as an "Active Product". Its compatibility with standard industrial protocols and its use of a widely recognized LG-Ni1000 sensing element ensure it can be integrated into a wide range of automation platforms, from traditional PLC-based systems to modern IIoT solutions. While direct upgrade paths for this specific model are not detailed, Siemens' broad portfolio of temperature sensors and building technology components allows for seamless integration into larger Siemens automation ecosystems, supporting scalability and future-proofing of control strategies.

#Frequently Asked Questions (FAQs)

Q1: What is the primary function of the Siemens BPZ:QAE26.95 temperature sensor?

The Siemens BPZ:QAE26.95 is an immersion temperature sensor designed for precise measurement.

It accurately detects liquid temperatures in industrial and HVAC applications.

Its core role is to provide reliable data for process control and system monitoring.

Q2: What is the measuring range of the Siemens BPZ:QAE26.95 sensor?

This sensor measures temperatures within a range of -50 to 180 degrees Celsius.

This wide range makes it suitable for diverse industrial and building applications.

It ensures accurate readings across both freezing and elevated operational temperatures.

Q3: What type of sensing element does the Siemens BPZ:QAE26.95 use?

The BPZ:QAE26.95 utilizes an LG-Ni1000 sensing element.

This type of element is known for its accuracy and stability in temperature readings.

LG-Ni1000 provides a reliable resistance output that corresponds to temperature changes.

Q4: What are the typical applications for the Siemens BPZ:QAE26.95?

It is commonly used in HVAC systems for fluid temperature monitoring.

Industrial applications include process control in pipelines and tanks.

It provides essential data for maintaining optimal conditions in various fluid systems.

Q5: How is the Siemens BPZ:QAE26.95 sensor installed?

Installation is via direct immersion using a standard R ¼" threaded fitting.

The sensor's immersion stem is inserted into the pipe or tank.

Proper immersion depth is crucial for accurate temperature acquisition.

Q6: What is the immersion length of the Siemens BPZ:QAE26.95?

The total immersion stem length is 465 mm.

The effective immersion length for accurate measurement is at least 15 mm.

This ensures the sensor effectively captures the fluid's temperature.

Q7: Can the cable of the Siemens BPZ:QAE26.95 be extended?

Yes, the standard 2-meter cable can be extended.

Extension is typically achieved by using a suitable branching box.

Consulting installation manuals ensures proper connection for signal integrity.

Q8: What is the pressure rating of the Siemens BPZ:QAE26.95?

This sensor is rated for pressures up to PN40.

This indicates its suitability for moderate to high-pressure industrial applications.

It can withstand typical operating pressures in many process lines.

Q9: What are the material specifications for the immersion pocket?

The immersion pocket is constructed from stainless steel.

This material provides excellent corrosion resistance in various media.

Stainless steel ensures durability and longevity in demanding environments.

Q10: Is the Siemens BPZ:QAE26.95 compliant with environmental directives?

Yes, it complies with the RoHS directive since July 2020.

It also falls under WEEE take-back obligations for electronics disposal.

Siemens prioritizes environmental compliance in its product design.