Original and Low Price Rosemount 644 Temperature Transmitter Module for Global Distribution

• Customization: Available
• Type: Network Type
• Measuring Medium: Temperature
• Model NO.: 644 Temperature Transmitter Module
• Display Type: LCD
• Site Display: Site Display
• Accuracy: 0.2
• IP Rating: IP67
• Certification: CE
• Customized: Customized
• Place of Origin: China
• Warranty: 1 Year
• Model: 644
• Customized Support: OEM
• Brand Name: Rosemount
• Product Type: Temperature Transmitter Module
• Input Type: Rtd, Thermocouple, Ohm, Millivolt
• Output Signal: 4-20 Ma Hart
• Measurement Range: -200°c to 850°c (-328°f to 1562°f)
• Power Supply: 10.5-55 V DC
• Enclosure Rating: IP66, IP67
• Certifications: CE, FM, ATEX, Iecex
• Mounting Style: DIN Rail or Panel Mount
• Housing Material: Aluminum or Stainless Steel
• Display: Optional LCD
• Transport Package: Original
• Specification: 10cm*10cm*10cm
• Trademark: Rosemount
• Origin: China
• HS Code: 9025191090
• Production Capacity: 900pieces/Year
• Package Size: 10.00cm * 10.00cm * 10.00cm
• Package Gross Weight: 1.000kg

Product Description

Product Description

Product Overview

The Rosemount 644 Temperature Transmitter Module, developed by Emerson, is a state-of-the-art device designed for precise temperature measurement and signal transmission in industrial applications. As part of the Rosemount 644 Series, this module integrates advanced sensor technology and robust communication protocols to deliver reliable performance in harsh environments. It supports a wide range of temperature sensors, including RTDs (Resistance Temperature Detectors) and thermocouples (Types J, K, T, etc.), ensuring compatibility with diverse process requirements. The transmitter is engineered for seamless integration into both new and existing systems, offering flexibility in mounting configurations, such as head-mounted or rail-mounted installations. Its compact design, combined with high durability, makes it suitable for industries such as oil and gas, chemical processing, power generation, and pharmaceuticals, where accurate temperature monitoring is critical for safety, efficiency, and regulatory compliance. With HART® 7 protocol support, the module enables bidirectional communication for real-time data access, configuration, and diagnostics, aligning with modern Industrial Internet of Things (IIoT) frameworks.

Key Advantages in Performance and Reliability

The Rosemount 644 Temperature Transmitter Module stands out for its exceptional accuracy, long-term stability, and advanced diagnostic capabilities. It achieves measurement accuracy up to ±0.1% of span, ensuring precise temperature control even in dynamic processes. The module's patented sensor-matching technology eliminates errors caused by sensor drift, reducing maintenance needs and downtime. Its robust construction, featuring stainless steel and high-grade alloys, provides resistance to corrosion, vibration, and extreme temperatures (operating range: -50°C to 85°C ambient, with sensor-specific limits up to 800°C). The device also incorporates predictive diagnostics, such as sensor health monitoring and signal integrity checks, which preemptively alert users to potential issues, enhancing operational safety. Additionally, the transmitter's global certifications—including ATEX, IECEx, and FM approvals for hazardous areas—ensure compliance with international safety standards. 

User-Centric Design and Integration Benefits

Beyond technical excellence, the Rosemount 644 Temperature Transmitter Module prioritizes ease of use and integration. Its intuitive interface, accessible via the local display or Emerson's AMS Device Manager software, simplifies configuration, calibration, and troubleshooting. The module's plug-and-play design allows for quick installation and replacement, minimizing labor costs and process interruptions. Furthermore, its compatibility with Emerson's Plantweb™ ecosystem enables seamless data integration with control systems like DeltaV™, fostering smart decision-making through centralized monitoring and analytics. The transmitter also supports wireless communication via Emerson WirelessHART® adapters, eliminating cabling complexities in remote or hard-to-access locations. By reducing total cost of ownership through energy efficiency, reduced calibration cycles, and extended service intervals, the Rosemount 644 empowers industries to achieve sustainable operational excellence. Whether in a high-temperature refinery or a sterile pharmaceutical plant, this module delivers unmatched versatility, precision, and adaptability, solidifying its position as a cornerstone of modern industrial automation.

Specification

Installation Tutorials
Step	Procedure	Details
1	Mounting	Secure the transmitter module on a DIN rail or flat surface using appropriate brackets. Ensure ambient temperature is within -40°C to +85°C.
2	Wiring	Connect sensor (RTD/thermocouple) to terminals 11(+) and 12(-). Supply 12-42 V DC power to terminals 21(+) and 22(-). Maintain polarity.
3	Configuration	Use HART communicator or AMS Suite to set sensor type, temperature range, and output parameters. Verify linearization settings.
4	Calibration	Perform trim calibration via HART to align sensor input with output signal. Follow local standards for traceability.
5	Testing	Apply simulated temperature signals and validate 4-20 mA output. Check for proper loop communication and alarm triggers.
6	Maintenance	Periodically inspect connections, clean terminals, and verify calibration stability. Update firmware via HART/FieldCare when required.

Company Profile

KeRui (weifang) Automation Equipment Co., Ltd. specializes in industrial automation instrument development, production and sales, technical services, and supportingequipment supply of specialized companies. The main products are flow meters, level meters, temperature meters, pressure meters, electrical meters, thermal intelligent meters, programmable controllers (PLC), DCS distributed control systems,and eight series of more than 1,000 specifications. Its products and technologies are widely used in electric power, metallurgy, petrochemicals, environmental textile, dyeing, and other fields.protection, plastics, food, printing, tobacco,textile, dyeing, and other fields.

Packaging & Shipping

FAQ

Q: How long will you give me the reply?

A: We will reply to you as soon as we see the information

 

Q: What is the delivery time?

A:The products in stock will be shipped after receiving the payment, and the products that

need to be ordered are subject to the factory time.

 

Q: How about your package?

A: Do not worry about the package, we have rich experience in packing.

 

Q: How about the payment terms?

A:You can choose T/T.

 

Q: What is the MOQ?

A:1PC.

 

Q: Can l get a lower price if l order large quantities?

A: Yes, cheaper prices with more bigger size orders.

 

Q:After sales and warranty?

A: We provide one year warranty lifetime technical support services.

 

Q:How about after-sales service?

A: We are 24 hours online, if you have any problem, please contact us directly.