| Customization: | Available |
|---|---|
| Type: | Network Type |
| Measuring Medium: | Temperature |
|
Still deciding? Get samples of $ !
Order Sample
|
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
|---|
| Payment Methods: |
|
|---|---|
| Support payments in USD |
| Secure payments: | Every payment you make on Made-in-China.com is protected by the platform. |
|---|
| Refund policy: | Claim a refund if your order doesn't ship, is missing, or arrives with product issues. |
|---|
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
Emerson Rosemount 644 Rail-Mount Temperature Transmitter Product Introduction
1. Overview
The Emerson Rosemount 644 Rail-Mount Temperature Transmitter is a high-precision, versatile device designed for industrial temperature measurement and control applications. As part of the Rosemount 644 series, this transmitter combines advanced sensor integration, robust construction, and flexible communication protocols to deliver reliable performance in demanding environments such as manufacturing, oil and gas, chemical processing, and power generation
. Its rail-mount design allows for easy integration into control panels or DIN rail systems, making it ideal for applications requiring compact and modular installations.
Key innovations include support for dual-sensor inputs, HART®/FOUNDATION™ Fieldbus/PROFIBUS® PA protocols, and advanced diagnostics, ensuring seamless compatibility with modern industrial automation systems.
2. Key Features
2.1 High Accuracy and Stability
Precision Measurement: The transmitter achieves ±0.15°C (±0.27°F) accuracy for Pt100 RTD inputs, with a digital-to-analog (D/A) conversion accuracy of ±0.03% of the span.
Stability: Offers a 2-year stability guarantee, reducing maintenance needs and long-term calibration drift.
Sensor Matching: A proprietary "Transmitter-Sensor Matching" feature improves system accuracy by up to 75% by compensating for sensor interchangeability errors
2.2 Versatile Input and Output Options
Input Compatibility: Supports 2-, 3-, and 4-wire RTDs, thermocouples (T/C), millivolt (mV), and resistance (Ω) signals.
Output Flexibility: Configurable for 4-20 mA analog output with HART® 7 protocol, enabling bidirectional communication for real-time diagnostics and parameter adjustments
2.3 Robust Design
Material: Constructed from aluminum or stainless steel, the transmitter withstands harsh environments with an operational temperature range of -50°C to +85°C
Certifications: Complies with international standards for vibration (IEC 60068-2-6), humidity (<99% RH), and ingress protection (IP20)
SIL 2 Certification: Available as an option (code QT), meeting safety integrity requirements for critical processes.
2.4 Advanced Diagnostics and User Interface
Hot Backup™ Capability: Ensures continuous operation during sensor failures by enabling automatic switching to a backup sensor.
LCD Display (Optional): Provides local readouts for temperature, diagnostics, and configuration. The Local Operator Interface (LOI) allows tool-free field updates.
Sensor Drift Alert: Monitors sensor health and alerts users to potential degradation, reducing unplanned downtime.
2.5 Rail-Mount Flexibility
DIN Rail Compatibility: Designed for easy installation on standard DIN rails, saving space in control cabinets.
Modular Configuration: Supports integration with other rail-mounted devices, streamlining system design.
| Parameter | Details |
| Input Types | RTD (2/3/4-wire), Thermocouples (J, K, T, etc.), mV, Ω |
| Output Signal | 4-20 mA with HART® 7; Optional PROFIBUS PA or FOUNDATION Fieldbus |
| Power Supply | 12-42.2 V DC (HART) |
| Operating Temperature | -50°C to +85°C |
| Humidity | <99% RH (non-condensing) |
| Weight | 150 g (single-input), 160 g (dual-input) |
| Communication Protocols | HART®, FOUNDATION Fieldbus, PROFIBUS PA |
| Calibration | 5-point calibration; Stability: ±0.15% of reading or ±0.15°C over 2 years |
4. Applications
The Rosemount 644 Rail-Mount Transmitter is engineered for diverse industrial sectors:
Oil & Gas: Monitors pipeline temperatures and process heaters in refineries.
Chemical Processing: Controls reactor temperatures and detects exothermic reactions.
Pharmaceuticals: Ensures compliance with strict hygiene standards using polished stainless steel housings.
Power Generation: Manages turbine inlet/outlet temperatures and cooling systems.
Food & Beverage: Sanitary applications requiring easy cleaning and high reliability
5. Installation and Configuration
5.1 Rail-Mount Setup
Mounting: Secures to DIN rails using compatible clamps; torque settings adhere to 0.5 Nm for terminal screws
Wiring: Supports up to 2.08 mm² (AWG 14) stranded wires; shielded cables recommended for RTD inputs to minimize noise
5.2 Configuration Tools
HART Communicators: Devices like the Yokogawa BT200 Handheld Terminal enable parameter adjustments and diagnostics via HART protocol
Emerson AMS Suite: Provides advanced asset management and predictive maintenance capabilities.
6. Advantages Over Traditional Methods
Reduced Installation Costs: Replaces expensive thermocouple extension wires with standard copper cables
Enhanced Accuracy: Cold-junction compensation and noise immunity improve measurement reliability
Simplified Maintenance: Diagnostics tools like sensor drift alerts reduce field inspections.
7. Support and Services
Emerson offers global technical support, including:
Customization: OEM/ODM/OBM services for tailored solutions
Certification Assistance: Guidance for hazardous area (ATEX, IECEx) and marine approvals.
Training: On-site or virtual sessions for installation and troubleshooting.
8. Conclusion
The Rosemount 644 Rail-Mount Temperature Transmitter sets a benchmark in precision, durability, and adaptability. Its integration of advanced diagnostics, dual-sensor redundancy, and rail-mount flexibility makes it indispensable for modern industrial automation. By minimizing lifecycle costs and maximizing uptime, it empowers industries to achieve operational excellence in temperature-critical processes.
The packaging and transportation of instrumentation in global trade hinges on a synergy of advanced materials, rigorous testing, regulatory compliance, and smart logistics. By adopting hybrid structural designs, leveraging real-time monitoring technologies, and prioritizing sustainability, exporters can ensure the safe, efficient, and cost-effective delivery of precision instruments. Continuous innovation in materials science and IoT integration will further redefine industry standards, enhancing resilience in an increasingly interconnected market.
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: Our delivery time is within 3-7 days after we get your payment;
for large qty mass orders, the time should be confirmed again for you.
Q: How about your package?
A: Do not worry about the package, we have rich experience in packing, and all our package is wooden case package.
Q: How about the payment terms?
A: You can choose T/T.
Q: Do you provide samples?
A: Yes, we have materials in stock to help you to get the samples as soon as we can.
Q: What is the MOQ?
A:1PC.
Q: Can I get a lower price if I order large quantities?
A: Yes, cheaper prices with more bigger size orders.
){kind=link}