Siemens S55720-S176 Smart Pressure Sensor

The Siemens S55720-S176, also known as the QBE3000-D4, is a sophisticated smart pressure sensor engineered for precise differential pressure measurements in industrial applications. This device offers a robust solution for monitoring and controlling processes involving slightly aggressive liquids and gases. Its key advantages lie in its high accuracy, reliable performance, and straightforward integration. The sensor boasts a measurement range of 0 to 4 bar and provides a 0-10V analog output signal, making it compatible with a wide array of control systems and data acquisition devices. Installation is facilitated by G1/8" threaded connections and included mounting hardware, ensuring a secure and efficient setup.

Product Specifications

| Specification             | Value                                 |

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

| Product Number            | S55720-S176 (QBE3000-D4)              |

| Type                      | Differential Pressure Sensor          |

| Media Compatibility       | Slightly aggressive liquids and gases |

| Measurement Range         | 0 to 4 bar                            |

| Output Signal             | 0-10 V DC                             |

| Connection Thread         | G1/8"                                 |

| Supply Voltage            | AC 24 V, DC 18–33 V                   |

| Max. Permissible Pressure | 25 bar                                |

| Max. Overpressure         | 80 bar                                |

| Medium Temperature        | -15 to 80 °C                          |

| Housing Material          | Aluminum                              |

| Ingress Protection        | IP65                                  |

| Dimensions                | 67 x 143 x 40 mm                      |

| Included Accessories      | Mounting bracket, 2 screwed fittings for 6mm copper pipe |

| Not Suitable For          | Ammonia, Freons                       |

Core Features & Market Positioning

The Siemens S55720-S176 distinguishes itself in the market through its precise measurement capabilities and robust construction, designed for demanding industrial environments. It leverages advanced sensing technology to deliver accurate differential pressure readings, crucial for process optimization and safety. Its positioning as a "smart" sensor implies enhanced data output and potential for integration into digital industrial ecosystems, although specific smart functionalities beyond the analog output are not extensively detailed in product information. The sensor is manufactured in Switzerland, often associated with high-quality engineering and manufacturing standards.

Key Application Scenarios

This differential pressure sensor is ideal for a multitude of industrial applications where precise pressure monitoring is essential. It finds use in verifying air volume flow, monitoring the status of filters and control fans, and supervising pressure in laboratories and production areas. Its suitability for slightly aggressive media also extends its application to chemical processing, wastewater treatment, and other environments where corrosive substances are present. The sensor's ability to measure differential pressure, overpressure, and negative pressure makes it versatile for various HVAC and process control tasks.

Practical System Integration Guidance

Integrating the Siemens S55720-S176 into existing systems is streamlined due to its standard G1/8" threaded connections and the inclusion of necessary mounting hardware. The sensor comes with a mounting bracket and two screwed fittings for 6mm copper pipe, simplifying physical installation. Electrical connection involves a plug-in connector, and it operates on AC 24 V or DC 18–33 V power supply, outputting a DC 0-10 V signal. Users should ensure that pressure tubing is connected correctly to prevent condensation buildup, especially if nipples point upwards. For optimal performance and to ensure the accuracy of technical data, vertical mounting with connection nipples pointing downwards is recommended.

Operation and Risk Mitigation

The Siemens S55720-S176 operates by employing a pressure diaphragm and ceramic lever system to detect differential pressure. The sensor outputs a calibrated and temperature-compensated signal, which can be linear or, in some configurations, extract-the-root for flow measurement. A critical aspect of risk mitigation involves adhering to its media compatibility. The sensor is explicitly not suitable for use with ammonia or freons, and care must be taken to avoid exceeding the maximum permissible or overpressure limits. Improper use, unauthorized repair attempts, or damage from natural disasters can void the warranty. Disposal of the device must comply with European directives for electronic waste.

Scalability & Long-Term Value

While specific upgrade paths for the S55720-S176 are not detailed, its integration into a broader Siemens industrial automation portfolio suggests potential for scalability. As a component within Siemens' extensive range of sensors and control systems, it can be part of a larger, interconnected Industrial Internet of Things (IIoT) solution. This allows for centralized monitoring, data analysis, and predictive maintenance strategies, enhancing long-term operational value and system efficiency. The sensor's reliable performance and durable construction contribute to its long-term value by minimizing downtime and maintenance requirements.

Frequently Asked Questions (FAQs)

What is the primary function of the Siemens S55720-S176?

This sensor measures differential pressure accurately. It is designed for liquids and gases. Its output is a 0-10V signal for monitoring.

The Siemens S55720-S176 is used in industrial automation. It helps control processes and ensure safety. Applications include HVAC and manufacturing.

It operates within a 0-4 bar range. This makes it suitable for many common industrial pressure needs. It is a reliable component for many systems.

What types of media can the Siemens S55720-S176 be used with?

This sensor is suitable for slightly aggressive liquids and gases. It offers versatility in chemical and industrial processes. Ensure media compatibility for optimal performance.

It is important to note specific exclusions. The sensor is not recommended for ammonia or freons. Using it with these substances can cause damage.

Always consult the product documentation. This ensures correct application and prevents operational issues. Proper media selection is key to longevity.

What is the output signal and how is it configured?

The Siemens S55720-S176 provides a DC 0-10V analog output signal. This is standard for many industrial control systems. It allows for easy integration with PLCs and data loggers.

Some configurations may offer other output characteristics. This sensor's output can be set to linear or extracting-the-root. The latter is useful for flow measurements.

Configuration details for specific outputs are available. Users can refer to the technical documentation. Proper setup ensures accurate data transmission.

What are the installation requirements for the S55720-S176?

Installation is straightforward with G1/8" threaded connections. It includes a mounting bracket and fittings. This simplifies mounting onto pipes or panels.

Ensure proper orientation for optimal performance. Vertical mounting with nipples pointing down is recommended. This prevents condensation issues.

Electrical connection is via a plug-in connector. Power requirements are AC 24 V or DC 18–33 V. Follow all safety guidelines during installation.

What is the measurement range and accuracy of this sensor?

The sensor has a measurement range of 0 to 4 bar. This covers a wide spectrum of industrial pressure monitoring tasks. It provides precise readings within this range.

Accuracy is a key feature for industrial applications. While specific accuracy figures are not listed here, Siemens sensors are known for reliability. High precision ensures process control.

The sensor also has high overpressure protection. It can withstand up to 80 bar of overpressure. This adds robustness to its operational capabilities.

Can the Siemens S55720-S176 be used in hazardous environments?

The sensor has an IP65 ingress protection rating. This means it is protected against dust and low-pressure water jets. It is suitable for many industrial environments.

However, it is important to verify specific environmental conditions. The materials used may have limitations with certain aggressive chemicals. Always check compatibility for specific site conditions.

This sensor is designed for general industrial use. For highly hazardous zones, specialized ATEX-rated equipment might be required. Consult Siemens for more extreme applications.

What is the supply voltage for the Siemens S55720-S176?

The sensor operates on AC 24 V or DC 18–33 V. This flexibility allows integration into various power systems. Ensure the correct voltage is supplied for operation.

Using the correct voltage is crucial for performance. Incorrect voltage can lead to sensor malfunction or damage. Always adhere to the specified power requirements.

This voltage range is common in industrial automation. It simplifies integration with existing electrical infrastructure. Always follow safety protocols when working with electrical supplies.

What accessories are included with the S55720-S176?

The sensor package includes a mounting bracket. It also comes with two screwed fittings for copper pipe. These fittings are for a 6 mm diameter pipe.

These accessories facilitate direct installation. They reduce the need for additional purchase of mounting components. This streamlines the setup process.

Always check the product packaging upon receipt. Ensure all listed accessories are present. Refer to the manual for detailed installation instructions.

What is the maximum overpressure rating for this sensor?

The Siemens S55720-S176 can withstand a maximum overpressure of 80 bar. This provides a significant safety margin. It protects the sensor from transient pressure spikes.

The maximum permissible pressure is 25 bar. Exceeding this limit repeatedly could impact sensor lifespan. It's crucial to operate within specified pressure limits.

Understanding these ratings is vital for system design. It ensures the sensor's reliability and durability. Always operate the sensor within its stated specifications.

Where is the Siemens S55720-S176 manufactured?

This Siemens differential pressure sensor is manufactured in Switzerland. Swiss manufacturing is often associated with high precision and quality standards. This indicates robust engineering and reliable construction.

The country of origin can be a factor in product selection. It implies adherence to strict quality control measures. This contributes to the sensor's overall dependability in industrial settings.

This information is important for sourcing and supply chain considerations. It also reflects the product's premium positioning in the market. Quality manufacturing ensures long-term performance.