Bimetal Thermometer Types

Bimetal thermometer types is made on the principle of metal's expansion and contraction,and bimetal thermometer with rtd integrated approach meet the needs of both the temperature field and the needs of long- distance transmission.Bimetal thermometers are used under moderate and low temperatures(-80 to +500℃), and are the ideal thermometers that can show temperatures on spot without external power supply.

Bimetal Thermometer is apply to instead the regular glass thermometer in many enviroments,such as petroleum, chemicals, ship, machinery, pharmaceutical, electricity,apply to measure the temperature of gas,liquid and steam,and read directly.It's a cost-effective choice.

According to the relative direction between the enclosure face and the protective tube, it is divided into back connection type, bottom connection type, and adjustable angle type. According to the use environment, it is divided into normal type, spray-proof type, marine type, flameproof type, and vibration-resistant type. The valid measure range is -80~500℃, the five accuracy classes are 1.0, 1.5, 2.0, 2.5, and 4.0.

Protective Tube Diameter and Mounting Thread (mm):

Model Identification Code Combination Table:

Application Scenarios

With core advantages of "passive convenience, sturdiness and durability, and multi-scenario adaptation", this product is widely used in temperature measurement of gases, liquids, and steam in various industries of industrial production, mainly including:

Petrochemical Industry: Temperature monitoring of storage tanks, pipelines, and pumps; corrosion-resistant type for chemical corrosive media, explosion-proof type for flammable and explosive scenarios.

Power Industry: Temperature measurement of boilers, heat exchangers, and pipelines in power plants; vibration-resistant type for equipment operating vibration environments, with clear reading for easy inspection.

Mechanical Manufacturing Industry: Temperature monitoring of oil temperature in machine tools, gearboxes, and hydraulic systems; small dials (Φ25/40mm) for narrow installation spaces of equipment.

Metallurgical and Iron & Steel Industry: Temperature monitoring of rollers and pipelines in cold/hot rolling production lines; high-temperature resistant protective tubes for medium-high temperature working conditions, with sturdy structure and wear resistance.

Marine Industry: Temperature measurement of marine power systems and pipelines; marine type has salt spray and vibration resistance, adapting to marine environments.

Food and Pharmaceutical Industry: Temperature monitoring of sterilization equipment and drying kilns; hygienic-grade stainless steel material meets industry requirements, with convenient on-site reading.

HVAC Industry: Temperature measurement of central air conditioning and heating pipelines; easy installation, no power supply required, adapting to civil and industrial HVAC systems.

Product Advantages

Passive Convenience for Power-Free Scenarios: Works without power supply, solving temperature measurement needs in remote areas and equipment without power supply; intuitive on-site reading, no additional debugging required.

Sturdy and Durable with Low Maintenance Cost: Simple mechanical structure, no electronic components, strong impact and interference resistance; long service life, only regular calibration needed in later stages, and maintenance cost far lower than electronic temperature measuring instruments.

Multi-dimensional Customization for Wide Adaptability: Dial size, installation method, protection type, and extended functions can be customized, accurately matching different equipment, environmental, and functional needs without additional adaptation components.

Clear Reading and User-Friendly Operation: Large-scale dial + adjustable angle design, facilitating inspectors to read data from different positions, reducing operation difficulty and reading errors.

Outstanding Cost-Effectiveness with Controllable Cost: Low manufacturing cost and affordable price, with extended functions, which can replace some high-priced electronic temperature measuring instruments, reducing equipment procurement costs.

Frequently Asked Questions

What are the core differences between bimetal thermometers and electronic thermometers? How to choose?

Answer: The core differences lie in working principle and applicable scenarios: Bimetal thermometers are passive with mechanical structure and strong anti-interference ability, adapting to power-free, vibrating, and harsh environments, with simple maintenance; electronic thermometers have high precision and support data transmission, adapting to automation and long-distance monitoring scenarios. When choosing, select bimetal thermometers for power-free/harsh environments, and electronic thermometers for automation/high-precision requirements.

How to select protective tube material and diameter according to working conditions?

Answer: ① Material selection: Carbon steel/304 stainless steel for ordinary media; 316L stainless steel/corrosion-resistant alloy for corrosive media; high-temperature alloy for high-temperature scenarios; ② Diameter selection: Φ6~8mm for regular scenarios; Φ10~12mm for strong vibration/high-pressure scenarios; Φ4mm for narrow spaces.

Does the product need regular calibration? What is the calibration cycle?

Answer: Regular calibration is required. The recommended calibration cycle is 1 year under normal working conditions; for long-term use in high-temperature (above 300℃), strong vibration, or corrosive environments, the cycle should be shortened to 6 months to ensure measurement accuracy meets requirements.

What is the adjustment range of the adjustable angle dial?

Answer: The adjustable angle (universal) dial can rotate 360°, which can be flexibly adjusted according to the installation position and observation angle, ensuring inspectors read from the best perspective, adapting to scenarios with complex equipment structure and limited observation angles.

What special precautions should be taken when using explosion-proof products?

Answer: ① Ensure the explosion-proof surface is clean and free of scratches, and the sealing ring is intact during installation to prevent flammable gas from entering; ② Do not disassemble the dial in explosive environments; ③ Regularly check the validity of explosion-proof marks and certificates to ensure the product meets explosion-proof standards; ④ Strictly follow explosion-proof wiring specifications during wiring to avoid electric sparks.

How to determine the insertion length?

Answer: The insertion length should be determined according to the temperature field of the measured medium and equipment structure. Generally, it is recommended that the insertion depth is not less than 10~15 times the diameter of the protective tube, and ensure the probe is completely immersed in the measured medium (not air layer) to avoid temperature measurement errors caused by insufficient insertion depth.

Manual Welding

Automatic Welding

Insulation Testing

Laser Marking

Warehouse Managing

Thermocouple Assemble

Vacuum Leak Detection

Surface Polishing

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