Emerson Rosemount 644 Temperature Transmitter: A Comprehensive Overview

The Emerson Rosemount 644 Temperature Transmitter is a state-of-the-art device designed to provide accurate and reliable temperature measurements for a wide range of industrial applications. This transmitter is part of the renowned Rosemount series, known for their precision, durability, and advanced features. In this article, we will provide an in-depth look at the Rosemount 644, covering its key features, benefits, applications, and overall importance in modern process control.For more information, welcome to visitemerson rosemount 644 temperature transmitterhttps://www.gold-sensor.com/product/emerson-rosemount-644-temperature-transmitter/ We areaprofessional enterprise platform in the field, welcome your attention and understanding!


The Rosemount 644 Temperature Transmitter is specifically designed to deliver high-accuracy temperature measurement in harsh and demanding environments. It is widely used in industries such as oil and gas, chemicals, power generation, and food processing, where maintaining precise temperature control is critical to ensuring product quality, process efficiency, and safety. With its robust construction and advanced capabilities, the Rosemount 644 offers reliable performance in both standard and extreme conditions.

One of the key selling points of this temperature transmitter is its ability to offer stable and accurate readings over a broad range of temperatures. It is compatible with a variety of temperature sensors, such as resistance temperature detectors (RTDs) and thermocouples, making it a versatile solution for different types of temperature measurements.


The Emerson Rosemount 644 is packed with features that make it a leader in temperature measurement and control technology. Some of its notable features include:

- **High Accuracy and Precision**: The Rosemount 644 provides outstanding accuracy, with a typical measurement uncertainty of 0.1°C. This high precision is essential in applications where even small temperature variations can significantly impact process outcomes.

- **Wide Temperature Range**: This transmitter supports a wide temperature range, from -200°C to 850°C, ensuring versatility across a variety of industries. Whether it’s measuring cryogenic temperatures in liquefied natural gas (LNG) facilities or high temperatures in industrial furnaces, the Rosemount 644 can handle diverse temperature profiles.

- **Multiple Input Options**: The transmitter is compatible with different temperature sensors, such as 2, 3, and 4-wire RTDs and thermocouples. This flexibility makes it adaptable to a wide range of measurement needs.

- **HART Communication Protocol**: The Rosemount 644 supports the HART (Highway Addressable Remote Transducer) communication protocol, enabling easy integration into digital control systems and facilitating remote monitoring and diagnostics. This makes it easier to maintain and troubleshoot the device without requiring physical access.

- **Intrinsically Safe**: Designed for use in hazardous environments, the Rosemount 644 complies with international safety standards, ensuring safe operation in explosive atmospheres or other dangerous industrial settings.

- **Digital Signal Processing**: The transmitter features advanced digital signal processing (DSP) technology, ensuring that the sensor signals are filtered and processed for maximum accuracy, reducing the impact of noise and external interference.


One of the reasons the Rosemount 644 is favored by industries worldwide is its ease of installation and configuration. The device is designed to be user-friendly, ensuring that both skilled professionals and technicians can set it up and integrate it into their systems without unnecessary complications.

The Rosemount 644 comes with intuitive setup options, including an easy-to-use display and a straightforward user interface. Whether using local calibration or performing remote configuration via HART, the setup process is efficient and streamlined. Additionally, the device supports a range of mounting options, including DIN rail and field mounting, offering further flexibility in installation.

For those seeking enhanced functionality, the Rosemount 644 offers advanced calibration capabilities, allowing users to fine-tune the transmitter to meet their specific process requirements. This ensures that the device performs optimally in the desired application.


The versatility and reliability of the Rosemount 644 make it suitable for a wide range of applications in different industries. Some common use cases include:

- **Oil and Gas Industry**: In oil refineries and natural gas processing plants, precise temperature control is critical for monitoring various phases of the production process, such as distillation, compression, and liquefaction. The Rosemount 644 helps ensure the safety and efficiency of these operations.

- **Chemical Processing**: Temperature control is essential in chemical reactors, mixers, and storage tanks, where exothermic and endothermic reactions occur. Accurate temperature readings from the Rosemount 644 help operators maintain ideal reaction conditions, improving both product yield and safety.

- **Power Generation**: In power plants, accurate temperature measurement is crucial for the operation of turbines, boilers, and heat exchangers. The Rosemount 644 helps operators monitor critical systems to optimize energy production and prevent equipment failures due to temperature fluctuations.

- **Food and Beverage**: In the food and beverage industry, precise temperature control ensures that products are manufactured to exacting quality standards, whether it’s in pasteurization, brewing, or food storage. The Rosemount 644’s ability to operate in hygienic and demanding environments makes it an ideal solution.

- **Pharmaceuticals**: In pharmaceutical manufacturing, maintaining strict temperature control is essential to ensure the quality and safety of products. The Rosemount 644 helps meet regulatory requirements while providing highly accurate temperature readings.


The Emerson Rosemount 644 Temperature Transmitter offers a range of benefits that enhance its value in industrial settings. These include:

- **Improved Process Efficiency**: With its accurate and reliable temperature measurements, the Rosemount 644 helps optimize processes, reduce waste, and increase overall productivity.

- **Reduced Maintenance and Downtime**: Its long-lasting performance and minimal need for calibration ensure that operators can rely on the transmitter for long periods, reducing maintenance efforts and downtime.

- **Enhanced Safety**: By providing precise temperature data, the Rosemount 644 helps prevent dangerous temperature fluctuations that could lead to equipment failure, accidents, or safety hazards in industrial environments.

- **Cost-Effective**: With its versatility and robust performance, the Rosemount 644 reduces the need for multiple temperature measurement devices, offering a cost-effective solution for a wide range of applications.

In conclusion, the Emerson Rosemount 644 Temperature Transmitter is a highly reliable and versatile solution that ensures accurate and stable temperature measurement across various industries. Its combination of precision, ease of use, and safety features makes it an essential tool for optimizing industrial processes and improving operational efficiency. Whether in the oil and gas industry, power generation, or food processing, the Rosemount 644 is a valuable asset to any temperature-sensitive operation.