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The WHD-BP stainless steel heating limiter is a high-quality device designed to ensure safety and ef...
* Rate: AC16A 250V
* Temperature Range: 30-75℃
* Bulb Dia: 6mm
* Bulb Length: as different temperatures
* Max resistance temperature T125
* Length of Capillary tube: 500-600mm* On-off Temperature Difference: 5℃
* Application: water heater|
| Parameter | Specification |
| Model | WHD-E-CU |
| Type | Copper Adjustable Capillary Temperature Controller |
| Rated Current / Voltage | AC 16A 250V |
| Temperature Range | 30–75°C |
| Sensing Bulb Diameter | 6 mm |
| Sensing Bulb Length | Depends on temperature setting |
| Capillary Tube Length | 500–600 mm |
| On-Off Temperature Difference | 5°C |
| Reset Type | Automatic Reset |
| Max. Withstand Temperature | T125 |
| Material | Copper sensing bulb and capillary |
| Certifications | Available upon request |
| Warranty | 1 year |
| Customization | OEM / ODM available |
The required sensing bulb length depends on the selected temperature setting. Please confirm the required specification before ordering.
Copper Adjustable Capillary Temperature Controller Advantages
Copper Bulb and Capillary
The WHD-E-CU uses a copper sensing bulb and copper capillary tube for temperature sensing at the heating point.
Wide Adjustable Range
The 30–75°C adjustable range supports different temperature control requirements in water heating equipment.
Mechanical Switching
The copper bulb and capillary drive the switch directly, without depending on an electronic sensor or control board, which simplifies the circuit design of the equipment it's installed in.
Defined On-Off Differential
The 5°C differential defines the temperature difference between switch-on and switch-off.
Copper Adjustable Capillary Temperature Controller Applications
The WHD-E-CU is suitable for heating equipment requiring an adjustable, mechanical temperature cut-off.
Electric storage water heaters
Hotel and commercial hot water systems
Other heating appliances requiring a mechanical, adjustable temperature control
For instant or tankless water heater models, confirm compatibility with our team based on the unit's heating element specification, since not all instant water heater designs use this bulb-and-capillary style of thermostat.
Copper Adjustable Capillary Temperature Controller Manufacturer and OEM Supplier
We are a copper adjustable capillary temperature controller manufacturer and factory supplying capillary temperature control components for water heater manufacturers, distributors, and wholesale buyers.
Custom and OEM Service
We support Custom, OEM, and ODM requirements according to confirmed product specifications. Available requirements can include temperature setting, capillary length, sensing bulb configuration, and other application-related specifications.
Factory Supply
As a direct Factory Supplier, we support sample evaluation, specification confirmation, OEM projects, and repeat Wholesale orders. Product requirements can be reviewed according to the target equipment and application.
WHD-E-CU Copper Adjustable Capillary Temperature Controller FAQ
What triggers the switch inside the WHD-E-CU?
The liquid inside the copper bulb changes volume as temperature changes. That volume change transfers through the capillary tube to a mechanical switch, which opens or closes the circuit at the set temperature.
What temperature settings are available on the Copper Adjustable Capillary Temperature Controller?
The controller adjusts within 30–75°C, with common water heater settings at 70°C, 72°C, and 73°C. Bulb length and capillary length vary depending on the temperature point selected.
What does the AC16A 250V rating mean for my application?
It's the maximum current and voltage the switch contacts can carry. Whether it fits your equipment depends on your heating element's actual load — check your element's rated current against this figure, or send us your specs and we'll confirm.
Does the WHD-E-CU need a separate power supply to sense temperature?
No. Temperature sensing and switching are mechanical, driven by the liquid in the copper bulb. The AC16A 250V rating refers to the electrical load the switch controls, not power needed for sensing.
Does the Copper Adjustable Capillary Temperature Controller reset automatically?
Yes. The switch recloses automatically once the sensed temperature returns within the set range — no manual reset is required.
Can the WHD-E-CU be customized for OEM projects?
Yes. Custom, OEM, and ODM requirements can be discussed according to the required temperature setting, capillary length, sensing bulb configuration, and other confirmed specifications.
Do you provide wholesale supply?
Yes. Factory supply of the Copper Adjustable Capillary Temperature Controller is available for wholesale buyers, distributors, water heater manufacturers, and OEM projects.
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