Original/New/Cheap Rosemount 644ha Temperature Transmitter

• Customization: Available
• Type: Network Type
• Measuring Medium: Temperature
• Model NO.: 644HA
• Display Type: LED
• Site Display: Site Display
• Accuracy: 0.1
• IP Rating: IP67
• Certification: CE
• Customized: Non-Customized
• Output Signal: 4-20 Ma
• Supply Voltage: 10.5–55 VDC
• Process Material: 316L
• Sensor Input: Rtd or Thermocouple
• Load Resistance: ≤1200 Ω
• Response Time: ≤100 Ms
• Ambient Temperature: -40°c to +85°c
• Electrical Connection: M20 Cable Gland or Terminal Compartment
• Protection Rating: IP66, IP67, NEMA 4X
• Certifications: CE, ATEX, Iecex, FM, CSA, Sil 2/3 Compliant
• Communication Protocol: Hart 5/7
• Diagnostics & Features: Sensor Drift Detection, Process Variable Trending,
• Power Consumption: ≤22 Ma
• Damping Adjustment: 0–100 Seconds
• Warm-up Time: <2 Seconds to 90% Accuracy
• Transport Package: with Carton Package
• Specification: 40X30X20 cm
• Trademark: Rosemount
• Origin: Singapore/China
• HS Code: 8479909090
• Production Capacity: 2000
• Package Size: 40.00cm * 30.00cm * 20.00cm
• Package Gross Weight: 6.000kg

Product Description

Product Description

Product Overview 

The Rosemount 644HAl1 Temperature Transmitter is a high - performance device designed to meet the demanding requirements of various industrial temperature measurement applications.

The transmitter can handle both single - sensor and dual - sensor assemblies. The dual - sensor option, such as in the case of redundant temperature measurement systems, provides enhanced reliability. In power generation plants, for instance, dual - sensor assemblies can be used to monitor the temperature of critical components like turbine bearings. If one sensor fails, the other can still provide accurate temperature data, ensuring continuous operation and preventing potential equipment failures.

Diagnostic and Monitoring Features

The Rosemount 644HAl1 is equipped with basic diagnostic capabilities that can detect common problems such as sensor failures, communication errors, and power issues. In the event of a problem, the transmitter can send out an alert, either through the HART protocol or a built - in alarm output. This helps operators to quickly identify and address issues, minimizing downtime.

The Hot Backup function is a valuable feature for applications where continuous temperature measurement is critical. In a dual - sensor configuration, if the primary sensor fails, the Hot Backup™ function automatically switches to the secondary sensor, ensuring uninterrupted temperature monitoring. This is essential in applications such as pharmaceutical manufacturing, where any interruption in temperature control can affect the quality of the products.

Communication Protocols

The 4 - 20 mA analog output is a standard in the industry, providing a simple and reliable way to transmit temperature data over long distances. Combined with the HART (Highway Addressable Remote Transducer) protocol, it enables digital communication for advanced functionality. The HART protocol allows for remote configuration, calibration, and access to diagnostic information. Operators can use a handheld HART communicator or a control system to interact with the transmitter, adjust settings, and receive real - time status updates.

This dual - mode communication setup enables seamless integration into existing control systems, allowing for efficient data transfer and remote management. Besides these, the Rosemount 644HAl1 also supports

Safety and Certification

The Rosemount 644HAl1 has been certified to Safety Integrity Level (SIL) 3. This certification, in accordance with IEC 61508, indicates that the device has been rigorously tested and meets the highest safety standards. In safety - critical applications, such as in the chemical and nuclear industries, SIL - certified temperature transmitters are essential to ensure the safety of personnel, equipment, and the environment.

The transmitter also complies with other industry - recognized standards, such as NAMUR NE 21, NE 43, and NE 89. Compliance with these standards ensures that the device performs reliably in electromagnetic - compatibility environments and meets the recommended practices for temperature transmitters in industrial applications.

Specification

Model	Rosemount 644HAl1
Sensor Input	RTD (Pt100, Pt1000, Ni100, Cu100) or Thermocouple (J, K, T, E, R, S, B, N, C, L)
Output Signal	4-20 mA HART (2-wire)
Measurement Range	RTD:-200°C to +850°C Thermocouple:-200°C to +1820°C (type-dependent)
Accuracy	RTD:±0.1°C or ±0.05% of span (whichever is greater) Thermocouple:±0.5°C or ±0.4% of span (whichever is greater)
Supply Voltage	10.5–55 VDC (loop-powered)
Load Resistance	≤1200 Ω (at 30V)
Response Time	≤100 ms (typical, adjustable via damping setting)
Ambient Temperature	Operating:-40°C to +85°C Storage:-50°C to +90°C
Process Connection	½" NPT, G½", or optional DIN 43 650 head mount
Electrical Connection	M20 cable gland or terminal compartment
Housing Material	Aluminum (standard) or stainless steel (optional)
Protection Rating	IP66, IP67, NEMA 4X
Certifications	CE, ATEX, IECEx, FM, CSA, SIL 2/3 compliant
Communication Protocol	HART 5/7 (digital superimposed on analog signal)
Diagnostics & Features	Sensor drift detection, process variable trending, remote configuration

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Company Profile

Company Introduction

Welcome to KeRui (Weifang) Automation Equipment Co., Ltd., your esteemed partner in pioneering industrial automation solutions. With a steadfast commitment to excellence, we specialize in the development, production, and distribution of cutting-edge industrial automation instruments. Our extensive portfolio caters to a diverse array of industries, delivering unparalleled precision and reliability.
At KeRui (Weifang), we take pride in offering a comprehensive range of products and bespoke technical services tailored to exceed the unique demands of our esteemed clientele. From state-of-the-art flow instruments to precise liquid level gauges, advanced temperature sensors, and robust pressure measurement devices, our offerings epitomize innovation and technological superiority.
Our expertise extends to electrical instruments, thermal intelligent systems, and sophisticated programmable logic controllers (PLC) alongside DCS distributed control systems, setting benchmarks in efficiency and performance across various sectors. Industries ranging from electric power and metallurgy to petrochemicals, environmental protection, plastics, food processing, and textiles benefit from our advanced solutions.
In fostering strategic alliances with esteemed brands such as Rosemount, Honeywell, Yokogawa, A-BB, and Siemens, we ensure the delivery of premium-grade products and pioneering solutions that uphold the highest industry standards.
Thank you for choosing KeRui (Weifang) Automation Equipment Co., Ltd. We eagerly anticipate the opportunity to elevate your operations with our unrivaled solutions and unwavering dedication to excellence.

Certifications

FAQ

Q1: In which regions does KeRui primarily operate and sell its products?

A:We primarily sell our products to South Asia (40.00%) , the Middle East (40.00%) , and Southeast Asia (10.00%). Additionally, we have a presence in South America, Southern Europe, Northern Europe, Central America, Western Europe, Eastern Asia, North America, Oceania, Africa, and Eastern Europe.

Q2:What types of industrial automation instruments does KeRui specialize in?

A:KeRui specializes in industrial automation instruments such as flow meters, liquid level instruments, temperature sensors, pressure transmitters, electrical instruments, PLCs, and DCS systems. 

Q3: How does KeRui ensure the quality of its products?

A:We ensure top-notch quality through rigorous testing and adherence to industry standards . Each product undergoes thorough inspection before shipment to guarantee reliability and performance.

Q4: Why should customers choose KeRui over other suppliers of industrial automation instruments?

A: Our company specializes in pressure, absolute pressure, and differential pressure transmitters, temperature electrical instruments, and flowmeter radar level meters, providing accurate technical specifications and competitive pricing.