Bimetal thermometer

Introduction

A bimetal thermometer is a temperature measuring instrument that uses the differential expansion of two bonded metals with different coefficients of thermal expansion to measure temperature, and it is used in industry, laboratories, HVAC, and many other applications for temperature measurement and indication. The thermometer consists of a bimetal strip or helix, made of two metals with different expansion rates bonded together, connected to a pointer; when the temperature changes, the two metals expand by different amounts, causing the bimetal element to bend or coil, and the movement is transmitted to the pointer, which indicates the temperature on a dial, and the bimetal thermometer is mechanical, requiring no power, and it is simple, rugged, and reliable, and it is available in various forms, including dial thermometers with a stem that is immersed in the medium, and bimetal thermometers are used for measuring the temperature of liquids, gases, and surfaces in industrial processes, in heating and ventilation systems, in ovens and furnaces, in food processing, in engines, in pipes and tanks, and in many other applications, with features such as a direct-reading dial, various temperature ranges, and corrosion-resistant construction. Bimetal thermometers are used where a simple, reliable, and economical temperature indication is required, and they are available in various stem lengths and mounting configurations, with accuracies that are suitable for industrial and general applications. With their simplicity and reliability, bimetal thermometers are widely used temperature measuring instruments.

Bimetal Thermometer LBBT-T2010

Bimetal Thermometer is a simple durable instrument designed to calibrate a wide range of temperature measurements. Works in harsh climatic conditions across the temperature measuring ran...

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Standards

IEC 60751:2008-Industrial platinum resistance thermometers and platinum temperature sensors

Complies with the above standards, but is not limited to them.

Features

1. Bimetal thermometer for mechanical temperature measurement without power.

2. Bimetallic coil sensor for durable, direct-reading temperature indication.

3. Suitable for industrial, HVAC, food, laboratory, plumbing and general use.

4. Includes thermometer, stem, dial, connection and operation manual.

5. Supports reliable temperature monitoring for industrial and general applications.

FAQ

Q1: What testing scenarios is this thermometer mainly applied to?

A: The bimetal thermometer is used in industrial facilities, HVAC systems, food processing, laboratories, plumbing, manufacturing and general applications to measure temperature mechanically using a bimetallic coil sensor without requiring external power for durable, direct-reading temperature indication. It supports industrial process temperature monitoring (pipes, tanks, vessels), HVAC system temperature measurement, food processing and storage temperature monitoring, laboratory equipment temperature indication, plumbing and heating system monitoring, manufacturing process control, and general temperature measurement. The bimetal design provides reliable, power-free temperature measurement with no batteries or electronics, making it suitable for industrial and harsh environments where electronic devices may fail.

Q2: What standards does this thermometer comply with?

A: The bimetal thermometer follows relevant ISO, ASTM, ASME and GB/T standards for bimetal thermometers, including ASME B40.200, ISO 10523, and relevant industrial standards. The hardware complies with applicable safety standards. Calibration should be traceable to national/international standards (ITS-90). Food and pharmaceutical use follows applicable industry regulations. Industrial use follows applicable process safety standards.

Q3: What is the warranty period for the whole thermometer and key components?

A: The whole bimetal thermometer is covered by a 12-month warranty. The bimetallic sensor, stem, dial, pointer and housing are covered, while connection fittings and gaskets are accessories. Damage from improper use, over-temperature, physical shock or unauthorized repair is excluded. Extended warranty may be available for industrial models.

Q4: Is this device difficult to operate? Is professional training required?

A: Operation is very simple: install the thermometer, allow temperature stabilization, and read the dial. No professional training is required for basic use, but for industrial or regulated applications, users should follow proper installation, calibration and maintenance procedures. We provide an operation manual and remote guidance. Proper immersion depth is important for accurate readings.

Q5: What is the typical lead-time for order delivery?

A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.

Q6: Is regular calibration required? What is the recommended calibration cycle?

A: Calibration recommended every 6-12 months for industrial/regulated use, or per quality system requirements. Routine verification against a reference thermometer periodically. Dial and pointer condition checked. Stem condition inspected for corrosion or damage. Full thermometer calibration annually by qualified personnel for critical applications.

Q7: Are supporting consumables universal?

A: Connection fittings, gaskets and calibration services are available from industrial suppliers, though thread type and size should match. Long-term consumable cost is very low for a bimetal thermometer.

Q8: Can I customize parameters or supporting accessories?

A: Customization includes dial size (50mm, 63mm, 100mm, 150mm), stem length, temperature range, accuracy class, connection type (NPT, BSP, flange), mounting (bottom, back, adjustable angle), case material (stainless steel, aluminum), and accessories. Additional fittings and accessories can be ordered separately. Custom orders extend delivery lead-time.

Q9: Does the purchase include on-site installation and commissioning service?

A: No installation service is included for standard bimetal thermometers. The package includes the thermometer and instruction manual. Professional installation can be arranged for industrial applications at additional cost.

Q10: What types of applications are compatible with this equipment?

A: The bimetal thermometer measures temperature in liquids, gases and semi-solids within the temperature range, stem length and pressure specification. Different applications require specific stem lengths (sufficient immersion depth, typically 75-100mm minimum), connection types and temperature ranges. The thermometer should not be used beyond its temperature or pressure rating. Users should select the appropriate temperature range for the application (pointer should read in the middle 50% of the scale for best accuracy), ensure proper immersion depth (at least 10x the stem diameter, or 75mm minimum), install in a location with representative temperature (avoid direct heat sources or cold spots), use proper thread sealant or gasket, calibrate regularly, avoid physical shock or vibration (can affect calibration), handle carefully (glass dial can break), and for food/pharmaceutical use, use sanitary connections and proper materials (316 stainless steel for wetted parts). The thermometer should be installed with proper protection (thermowell) for high-pressure or corrosive applications. For outdoor use, use a weatherproof case. The bimetal thermometer is not suitable for very rapid temperature changes (slow response compared to electronic sensors). The dial should be read at eye level to avoid parallax error. The stem should be inspected regularly for corrosion, especially in corrosive environments. The thermometer should be removed from service if the pointer does not return to ambient temperature or if the dial is damaged.