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Temperature Thermostat

  • WHD-RM Three-Phase Manual Reset WHD-RM Three-Phase Manual Reset
    WHD-RM Three-Phase Manual Reset

    The WHD-RM is a three-phase manual reset device designed for industrial applications. When...

  • KCD1-F LED Rocker Toggle Switch KCD1-F LED Rocker Toggle Switch
    KCD1-F LED Rocker Toggle Switch

    Green illuminated round rocker switch with single-pole, single-throw (SPST) contacts and o...

  • KCD3-A Red Marine Rocker Switch KCD3-A Red Marine Rocker Switch
    KCD3-A Red Marine Rocker Switch

    Accurate Indicator Markings: Visible markings on the rocker arm provide accurate indicatio...

  • KCD4-A Green Recessed Rocker Switch KCD4-A Green Recessed Rocker Switch
    KCD4-A Green Recessed Rocker Switch

    Rocker switches are among the most widely used electrical switches in industry today. Thei...

  • Octagonal Knobs Octagonal Knobs
    Octagonal Knobs

    An eight-sided knob, often used in control systems, offers precise adjustment of parameter...

  • White Gear Knobs White Gear Knobs
    White Gear Knobs

    The white gear-shaped knob is a functional and ergonomic control component. White in color...

  • Red Lace Knobs Red Lace Knobs
    Red Lace Knobs

    The red lacework knob is a unique decorative element that combines beauty with practicalit...

  • Black Flat Knobs Black Flat Knobs
    Black Flat Knobs

    The black flat knob is a sleek and functional control component. Its flat design allows fo...

  • White Flat Knobs White Flat Knobs
    White Flat Knobs

    This white flat knob provides a simple but effective control solution. Its flat design ens...

  • Sequin Knobs Sequin Knobs
    Sequin Knobs

    A sequined knob is a decorative control element with a sparkling surface due to embedded s...

  • Black Handle Knobs Black Handle Knobs
    Black Handle Knobs

    A black handle knob is a functional control component designed for ease of use. Its black ...

  • Luxury Lace Knobs Luxury Lace Knobs
    Luxury Lace Knobs

    The Deluxe lacework Knob is a unique decorative element that combines elegance and practic...

About Us
Wenzhou Leheng Technology Co., Ltd.
Wenzhou Leheng Technology Co., Ltd.
Wenzhou Leheng Technology Co., Ltd. established in 2012 is a reputable enterprise specializing in product development, manufacturing, and international sales. We professionally produce thermostats, limiters, rocker switches, and PCB thermostats.
Our company has obtained certifications such as UL, TUV, CE, CQC, KC, RoHS, REACH, SGS, ISO 9001, and ISO 14001, along with multiple patents. We have participated in drafting and formulating national industry standards and have been repeatedly recognized as an innovative enterprise and a trustworthy contract-abiding company. In 2020, we were certified as a National High-Tech Enterprise.
Adopting an advanced systematic management model, we prioritize customer interests and maintain a highly capable team with skilled technical professionals. Upholding a people-oriented development philosophy, we strive to create a bright and comfortable working environment for our employees.
As one of the companies in China's thermostat industry with a notable number of automated equipment, we differentiate ourselves by utilizing optical inspection instruments for testing. Our standardized assembly lines and self-designed fully automated production equipment enable intelligent industrial control, ensuring end-to-end automation in assembly and testing. Strict quality control is implemented from the source components. Currently, our monthly production exceeds 1 million units, with an annual output surpassing 12 million+ units.
Our products are distributed across all domestic regions and exported to over 80 countries worldwide, including the United States, Turkey, Australia, India, Russia, Iran, Germany, Brazil, Mexico, South Africa, and Egypt. Thanks to our reliable products, professional sales service, and competitive pricing, we have earned widespread recognition from customers globally.
We sincerely look forward to cooperation with you to establish a long-term, stable partnership for mutual success.
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Industry knowledge

Thermoreats play a central role in modern temperature-regulation systems used across residential, commercial, and industrial environments. As demand for precise thermal management increases, various thermoreat types—including Control Thermoreats, Safety Thermoreats, and Thermoreat Temperature Controllers—have evolved to address different functional needs.

Overview of Thermoreat Technology

A thermoreat is a device designed to monitor temperature and trigger a control action—typically activating or shutting down heating or cooling components—when a preset threshold is reached. Thermoreats help maintain stable operating conditions, improve system efficiency, and protect equipment from damage caused by excessive temperatures.

Modern thermoreats come in numerous configurations, ranging from simple mechanical units to advanced electronic controllers with programmable settings. Across industries, these devices contribute to increased reliability, operational consistency, and energy management.


Control Thermoreat: Function and Industry Role

A Control Thermoreat regulates temperature by automatically switching equipment on or off based on a user-defined setpoint. These thermoreats maintain consistent environmental or component temperatures and are widely used in appliances, HVAC systems, industrial machinery, and laboratory equipment.

Operating Principle

Control Thermoreats commonly rely on components such as:

  • Bimetallic elements

Mechanical bending caused by temperature change activates contacts.

  • Capillary systems

A temperature-responsive fluid expands or contracts, manipulating a switch.

  • Electronic sensors (NTC, RTD, thermistor)

Provide precise resistance changes interpreted by electronic controls.

Key Features of Control Thermoreats

Feature Category Description
Adjustment Capability Users can set target temperature ranges.
Switching Method Mechanical or electronic switching depending on design.
Reaction Speed Moderate to high response depending on sensing element.
Durability Designed for repeated cycling in heating/cooling systems.

Applications

Control Thermoreats ensure stable operational temperatures in:

  • Household appliances
  • Environmental control chambers
  • Food-service equipment
  • Fan heaters and cooling systems
  • Industrial ovens and dryers

Their primary goal is maintaining a consistent temperature rather than enforcing safety limits.


Safety Thermoreat: Protection-Focused Temperature Control

A Safety Thermoreat is a protective device designed to prevent overheating. Unlike Control Thermoreats, their setpoint is typically fixed or inaccessible to end users, ensuring consistent protective performance.

Operating Principle

Safety Thermoreats function as a failsafe mechanism. If the temperature exceeds a predefined limit, the thermoreat interrupts the power supply to critical components. This prevents risks such as equipment failure or material degradation.

Key Features of Safety Thermoreats

Feature Category Description
Fixed Setpoint Temperature limit defined by design, not user adjustable.
Fail-Safe Design Prioritizes interruption of power during abnormal heat rise.
Reset Method Automatic reset or manual reset depending on model.
Robust Construction Designed for high-temperature resistance and reliability.

Applications

Safety Thermoreats are essential in systems where overheating can cause significant damage. Common applications include:

  • Heating equipment
  • Industrial process machinery
  • Water boilers and electric heaters
  • Thermal protection in motors and electronics
  • Commercial kitchen appliances

These thermoreats focus on preventing over-temperature events rather than regular temperature regulation.


Thermoreat Temperature Controller: Precision and Programmability

A Thermoreat Temperature Controller offers advanced control capabilities beyond basic on/off switching. These devices often incorporate digital interfaces, sensors, relay outputs, and logic algorithms for accurate thermal management.

Operating Principle

Thermoreat Temperature Controllers collect sensor data and process it through a control algorithm. Popular control strategies include:

On/Off Control – Simple binary switching

  • Proportional Control – Output varies based on deviation from setpoint
  • PID Regulation – Balances proportional, integral, and derivative input for smooth, precise control

Key Features of Temperature Controllers

Feature Category Description
Programmable Settings Users can define heating/cooling modes and temperature profiles.
Display Interface Digital readout for easy monitoring and adjustment.
Sensor Compatibility Supports various input types such as thermocouples, RTDs, and NTC sensors.
Accuracy Provides stable and precise temperature maintenance.
Multi-Stage Output Can control multiple heating or cooling stages.

Applications

Thermoreat Temperature Controllers are used in environments needing precise and adjustable thermal regulation:

  • Industrial manufacturing processes
  • Environmental simulation equipment
  • Smart building systems
  • Cold-chain logistics
  • Laboratory and medical devices
  • Automated agricultural systems

Their flexibility and accuracy make them suitable for advanced process control.


Differences Between Control Thermoreat, Safety Thermoreat, and Temperature Controller

The following table highlights the distinctions among the three thermoreat types:

Category Control Thermoreat Safety Thermoreat Temperature Controller
Primary Purpose Regulation Over-temperature protection Precision control
Adjustability Adjustable Usually fixed Highly programmable
Safety Function Secondary Primary Integrated but varies
Typical Output Simple on/off  Power interruption Relay / logic-driven
Complexity Level Moderate Low High
Common Use Cases HVAC, appliances Heaters, motors Industrial equipment, smart systems

Understanding these differences helps ensure correct device selection based on system requirements.

Industry Trends in Thermoreat Technology

Thermoreat technology continues to evolve due to industrial automation and energy-efficiency demands. Several notable trends include:

  • Shift Toward Digital Control

Digital controllers are increasingly replacing mechanical thermoreats due to high accuracy, access to data logging, and compatibility with advanced sensors.

  • Integration With Monitoring Systems

Linked thermoreat controllers provide remote status monitoring and operational insights, which assists in preventive maintenance and operational planning.

  • Emphasis on Safety and Compliance

Manufacturers design thermoreats that meet stringent safety and operational standards in various global markets.

  • Improved Material and Sensor Technology

Thermoreats now use more durable materials and sensors capable of reliable performance across a wider temperature range.


Key Factors in Selecting a Thermoreat for Industrial and Commercial Use

To choose the appropriate thermoreat, consider several important criteria:

  • Temperature Range Requirements

Assess the small and big operational temperatures to ensure proper compatibility with the application.

  • Control Accuracy

Applications requiring precise tolerance should opt for advanced Temperature Controllers.

  • Environment and Installation Conditions

Factors such as humidity, vibration, insulation class, and mounting design must align with the chosen thermoreat specifications.

  • Safety Mechanisms Needed

Systems prone to overheating should incorporate Safety Thermoreats to reduce risk.

  • Electrical Compatibility

Voltage, current rating, and switching capacity must be matched to the controlled device.

  • Reset Function Preferences

Automatic versus manual reset options impact usability and recovery procedures.

Thermoreats serve an integral role in managing temperature across a diverse range of applications. Control Thermoreats maintain consistent operating conditions, Safety Thermoreats protect against excessive temperatures, and Thermoreat Temperature Controllers deliver high-precision programmable control.

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