Product Description
The Original Rosemount 644 Temperature Transmitter Module, a product of Emerson - a global leader in automation solutions, is highly regarded in the industrial temperature measurement field. It is designed to meet the diverse and demanding temperature - sensing needs of various industries, ranging from oil and gas, chemical processing, and power generation to food and beverage and pharmaceutical industries. This transmitter module offers a reliable and accurate means of converting temperature sensor signals into standard output signals that can be easily integrated into industrial control systems.
The transmitter uses an analog - to - digital converter (ADC) to convert the analog sensor signal into a digital format. Digital signal processing techniques are then applied to the digital data. These techniques involve complex algorithms for linearization, as the relationship between the sensor output and temperature is often non - linear. For example, the output of a thermocouple is non - linear, and the transmitter uses pre - programmed polynomial equations to linearize the signal, ensuring that the output temperature value is highly accurate.After linearization and other signal - processing steps, the transmitter converts the processed digital data into a standard output signal. The most common output signals are 4 - 20 mA DC current loop, which is widely used in industrial control systems for its robustness against electrical interference over long distances. Additionally, the Rosemount 644 can also provide digital outputs such as HART (Highway Addressable Remote Transducer) protocol, which allows for two - way communication between the transmitter and a host system. This enables remote configuration, calibration, and diagnostic functions.
Features
The Rosemount 644 is renowned for its high - accuracy temperature measurement capabilities. It can achieve an accuracy of ±0.05% of span for RTD measurements and ±0.4 °C for thermocouple measurements. This high level of accuracy is crucial in industries where precise temperature control is essential. For instance, in pharmaceutical manufacturing, accurate temperature measurement is required during the production of drugs to ensure product quality and consistency. A small deviation in temperature could potentially affect the chemical reactions involved in drug synthesis, leading to sub - standard products.The Rosemount 644 is renowned for its high - accuracy temperature measurement capabilities. It can achieve an accuracy of ±0.05% of span for RTD measurements and ±0.4 °C for thermocouple measurements. This high level of accuracy is crucial in industries where precise temperature control is essential. For instance, in pharmaceutical manufacturing, accurate temperature measurement is required during the production of drugs to ensure product quality and consistency. A small deviation in temperature could potentially affect the chemical reactions involved in drug synthesis, leading to sub - standard products.
Industrial Process Control
It can operate over a very wide temperature range, typically from - 55 °C to 85 °C for the transmitter electronics. This makes it suitable for use in various environmental conditions, from cold storage facilities in the food industry to high - temperature process areas in chemical plants. The sensor compatibility also allows for measurement of a broad range of process temperatures. For example, when using a type K thermocouple, it can measure temperatures from - 200 °C to 1372 °C, while a Pt100 RTD can cover a range from - 200 °C to 850 °C.The HART communication protocol integration is a significant feature of the Rosemount 644. HART allows for digital communication superimposed on the 4 - 20 mA analog signal. This enables users to access additional information from the transmitter, such as process temperature, sensor status, and diagnostic data, without interfering with the analog control loop. It also allows for remote configuration of the transmitter's parameters, such as the measurement range, damping time, and sensor type. For example, in a large - scale industrial plant with multiple temperature measurement points, operators can use a handheld HART communicator or a control system to remotely configure and monitor the Rosemount 644 transmitters, saving time and effort compared to physically accessing each transmitter.The Rosemount 644 is designed for easy installation. It has a compact and rugged housing that can be easily mounted on a DIN rail or directly on a process pipe using appropriate mounting brackets. The wiring connections are clearly marked, and the transmitter comes with detailed installation instructions. Configuration of the transmitter is also straightforward. The HART communication interface allows for easy parameter setting using a HART communicator or a control system. Additionally, some models of the Rosemount 644 may also have a local user interface with push - buttons and a display for basic configuration and status monitoring on - site.
Product Parameters
| Accuracy |
4-20ma |
Place of Origin |
China, Singapore |
| Material |
plastic |
Customized Support |
OEM, ODM, OBM |
| Warranty |
1 Year |
Brand Name |
Rosemount |
| Model Number |
644 |
Material |
waterproof |
| Type |
temperature transmitter |
Temperature Range |
-40-85 °C |
| Output Signal |
4~20mA DC + HART |
Weight |
1.5KG |
| Selling Units |
Single item |
Single Package Size |
5X5X4 cm |
| Single Gross Weight |
1kg |
- |
- |
Packaging & Shipping
Carton Boxes
Company Profile
KeRui (Weifang) Automation Equipment Co., Ltd.Specializes in industrial automation instrument development, production and sales, technical services, and supporting equipment supply to 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 protection, plastics, food, printing, tobacco, textile, dyeing, and other fields.
FAQ
1.Q: How long is the delivery?
-- Mostly within 10days
2.Q:Can I get a sample?
-- Sure, contact our sales please
3.Q:What is your MOQ?
-- 1pcs
4.Q: How about warranty time?
-- 12month
5.Q: How can I visit your factory?
-- Fly to Qingdao air port, it's our pleasure to pick you up.
6.Q:How do you control your quality ?
-- We have EPR system .we control from parts, process, testing, packing ,retesting.
Every Sensor will be tested two times before reach you, after that sport test for the third time. Make sure about the quantity.
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