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The AMETEK HLM Resistance Thermometer

The AMETEK HLM Resistance Thermometer is a precision temperature measurement device that belongs to the high-end measurement instrument in the AMETEK product line. AMETEK is a world-renowned manufacturer of electronic instruments and electromechanical equipment for a wide range of applications in materials science, ultra-precision measurement, process analysis, test measurement, and communications. With its high accuracy, stability and reliability, the HLM series resistance thermometers occupy an important position in many fields such as industrial automation, laboratory research and quality control.
AMETEK HLM电阻温度计

At the heart of the HLM resistance thermometer is its high-precision platinum resistance sensor, which provides a change in resistance that is closely related to temperature changes. By measuring the resistance value of the sensor and converting it into a temperature reading, the HLM thermometer enables accurate temperature measurements. Sensors are typically designed with high-purity platinum materials to ensure excellent linear response and minimal temperature drift over a wide temperature range.

The working principle of the HLM thermometer is based on the principle of resistance temperature detectors (RTDs), i.e. the resistance value of a metal increases with increasing temperature. Platinum resistance thermometers are widely used in applications that require high-precision measurements due to their good stability and repeatability in the temperature range from -200°C to 850°C. HLM thermometers may be connected with four or three wires to reduce the measurement error caused by the resistance of the connected wires and ensure the accuracy of temperature measurements.

The main contents are as follows:

Fields of application
Scope of application: This thermometer is suitable for surface temperature measurement up to 180°C, and is mainly used for bearing temperature monitoring of ship engines and mechanical structures to prevent damage and failure of expensive equipment.
Industry application: Mainly used in machinery and marine industry.
Technical features:
Connection: 3-wire connection as standard.
Sensor selection: Specially selected RTD (Resistance Temperature Detector) is used.
Structural design: It has a robust structure, is able to resist vibrations, and complies with IEC 68-2-6 standards.
Certification: Type approvals from multiple classification societies.
Response time: Fast response time thanks to the use of a Pt100 resistance thermometer in accordance with IEC 751.
Installation and adjustment: It is easy to install, and can quickly adapt to different needs by adjusting the insertion length.
Cable type
Insulation material: Teflon insulation, including shielding layer, maximum temperature resistance 200°C, diameter 0.382mm.
Special needs: special customization is available.
Accessories and customer information
Accessories: Not listed.
Customer information: Fill in the customer's name and phone number.
Technical data
Dimensions: No specific dimensions are provided.
Cable characteristics
Insulation: Teflon FEP, temperature range -50 to +200°C, corrosion and heat resistance.
Process connection and response time
Response time: Half-life of 0.5 seconds for a protective tube diameter of 8 mm, and a representative measurement time of 1.5 seconds.
Cable connection
Connection: 1xPt100, 2xPt100, 2-3-4 wires, 2 wires are available, color coded as red and red/green.
Certification Bodies
Certification Bodies: including Lloyd's Register of Shipping and Det Norske Veritas.

Applications for AMETEK HLM resistance thermometers include, but are not limited to, the following:

Industrial automation: In automated production lines, HLM thermometers can monitor temperature changes in the production process in real time, providing accurate data for the control system to ensure that the process is carried out within the optimal temperature range.
Marine industry: In the marine industry, thermometers, thermocouples, and other temperature sensors can be used to monitor the temperature of thermometers, thermocouples, and other temperature sensors that can be affected by mechanical, thermal, and chemical factors that can accelerate aging to ensure operational reliability and longevity.
Power Generation and Energy Distribution Sector: In power stations and energy distribution systems, where temperature measurement and control are essential to maintain the stable operation of the system, HLM thermometers can provide the necessary temperature monitoring functions.
Chemical and petrochemical industry: In the chemical and petrochemical industry, precise temperature control is very important for the control of reaction processes and the assurance of product quality, and HLM thermometers can help to achieve this.
Pharmaceutical industry: In the pharmaceutical industry, temperature control is essential for the production and storage of pharmaceutical products, and HLM thermometers can be used to ensure that pharmaceutical products are produced and stored at the right temperature.
Food industry: HLM thermometers can be used in food processing and storage where temperature monitoring is critical to prevent food spoilage and ensure food safety.
Medical devices: In the temperature measurement of medical devices, HLM thermometers can be used to monitor vital signs or ensure medical safety.
Laboratory research: In scientific research and laboratory testing, HLM thermometers can provide precise temperature control and ensure the reliability of experimental data.
Aerospace: In the aerospace field, temperature sensors are used to monitor the temperature of aircraft materials to ensure the safe and reliable operation of aircraft.
Environmental monitoring: In environmental monitoring, HLM thermometers can be used to monitor water temperature and provide important data for water quality analysis.

Benefits of AMTEK HLM Resistance Thermometers

AMTEK HLM resistance thermometers offer several significant advantages over traditional thermometers:
High-precision measurements: Resistance thermometers typically have high measurement accuracy because they rely on a stable relationship between the resistance value of the material and the temperature, which can be precisely calibrated by electronic circuitry.
Wide measuring range: Resistance thermometers are suitable for measurements at very low and high temperatures, which makes them very useful in scientific research and industrial applications.
Fast response time: Resistance thermometers can quickly sense temperature changes and produce corresponding resistance value changes, allowing electronic devices to respond quickly and calculate temperature values.
Stability: Resistance thermometers are stable and less affected by environmental factors, which is especially important for applications that require long-term continuous monitoring.
Immunity to electromagnetic interference: Resistance thermometers are less sensitive to electromagnetic interference than some traditional thermometers, which makes them more reliable for measurements in electromagnetic noise environments.
Easy integration and remote monitoring: Resistance thermometers can be easily integrated into electronic systems and temperature monitoring can be performed via remote sensors, which increases application flexibility and convenience.
Durability: Resistance thermometers are typically designed to be rugged enough to withstand harsh operating environments, reducing maintenance needs and extending their lifespan.

The Resistor Thermometer HLM is a precision temperature measuring device manufactured by FRODE PEDERSEN & CO designed for bearing temperature monitoring in marine engines and mechanical structures. It is a 3-wire connection standard with a specially selected Pt100 Resistance Temperature Detector (RTD) with rugged construction and excellent vibration resistance in accordance with IEC standards. Capable of responding quickly to temperature changes and suitable for surface temperature measurement up to 180°C, this thermometer is designed to prevent equipment damage and malfunction, and is widely used in the machinery and marine industries. Its Teflon insulated cables are corrosion- and heat-resistant, can withstand temperatures up to 200°C, and have been type-approved by multiple classification societies, ensuring product reliability and safety.
The article is from the Temperature Calibrator(温度校验仪