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WHD-ST65-DZ Water Heating Blanket Integrated Thermostat

The WHD-ST65-DZ Water Heating Blanket Integrated Thermostat combines heating temperature control, water pump control, water level detection, and alarm functions on one compact circuit board. An NTC probe provides temperature feedback to the PWM heating control loop, while a rotary handle controls power on/off and temperature adjustment.

With drop-in mounting compatible with a conventional mechanical thermostat and dedicated terminals for pump and heating element connection, the WHD-ST65-DZ is suitable for water heating blanket manufacturers, distributors, and OEM product applications.

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*Power Supply: AC 220V
*Control Mode: PWM Heating
*Water Level Detection: Positive (both detector wires connected when full). Unplugging the water level detector disables the device alarm.
*Heating Power: Long-term control of 200-1800W heating elements. Instantaneous support of 2400W for PTC heating elements.
*Water shortage alarm.
*High temperature alarm (alarm and power off when exceeding 80°C).

Parameter Specification
Model WHD-ST65-DZ
Brand LEHENG
Type Water Heating Blanket Integrated Thermostat
Power Supply AC 220V
Control Mode PWM Heating
Heating Power 200–1800W (long-term), 2400W instantaneous (PTC elements)
Temperature Sensing NTC Probe
High-Temperature Alarm Buzzer + power off above 80°C
Water Level Detection Positive type (both wires connected when full)
Water Shortage Alarm Buzzer + power off when water is low
Connector Terminals 3 × 3.96mm (pump, heating element, power supply)
Control Interface Rotary Handle
Mounting Same dimensions as conventional mechanical thermostat
Place of Origin Zhejiang, China
Warranty 1 year
Customization OEM / ODM available

Heating power, connector configuration, and mounting dimensions should be confirmed against the target product housing before ordering.

Water Heating Blanket Integrated Thermostat Advantages

Integrated Multi-Function Control

Temperature control, pump control, water level detection, and alarm functions sit on one board, reducing the number of separate parts needed in a water heating blanket assembly.

NTC-Based Temperature Sensing

The NTC probe reads heating element temperature and feeds it into the PWM control loop for the heating output.

Dual Alarm Protection

The buzzer and automatic power-off trigger on both low water level and temperature above 80°C, addressing two common fault conditions in one circuit.

Drop-In Mounting Compatibility

Mounting dimensions match a conventional mechanical thermostat, simplifying retrofitting into existing product housings.

Water Heating Blanket Integrated Thermostat Applications

The WHD-ST65-DZ is built for water-heating blanket assemblies and similar low-voltage water heating products used in home settings.

Water heating blankets and heated bedding systems
Household water-circulation heating products
Heating assemblies requiring combined pump and temperature control
Equipment where water level monitoring and overheat protection are both required in one control unit


Water Heating Blanket Integrated Thermostat Manufacturer and OEM Supplier

LEHENG is a Water Heating Blanket Integrated Thermostat manufacturer and factory supplying integrated heating control boards for water heating blanket manufacturers, distributors, and wholesale buyers.

Custom and OEM Service

Custom and OEM configurations can be discussed for heating power, connector layout, alarm thresholds, and mounting dimensions according to confirmed product specifications.

Factory Supply

As a direct factory supplier, LEHENG supports sample evaluation, specification confirmation, OEM production, and repeat wholesale orders, backed by a 1-year warranty with return/replacement service and free spare parts.


WHD-ST65-DZ Water Heating Blanket Integrated Thermostat FAQ

What does the water level detection do if the sensor is disconnected?

Unplugging the water level detector disables the water shortage alarm function on this Water Heating Blanket Integrated Thermostat.

What heating loads does the WHD-ST65-DZ support?

It supports long-term control of 200–1800W heating elements, with instantaneous support up to 2400W for PTC heating elements.

Can this board be installed in place of an existing mechanical thermostat?

The mounting dimensions match a conventional mechanical thermostat, so it can be installed as a like-for-like replacement in compatible housings — confirm your specific product dimensions before ordering.

What happens if the water temperature exceeds the set limit?

The buzzer sounds and heating stops automatically when the sensed temperature exceeds 80°C.

Can the Water Heating Blanket Integrated Thermostat be customized for OEM projects?

Yes. Custom and OEM configurations can be discussed for heating power, connector terminals, and alarm settings according to the target product design.

Do you provide wholesale supply?

Yes. Factory supply of the WHD-ST65-DZ Water Heating Blanket Integrated Thermostat is available for wholesale buyers, water heating blanket manufacturers, and OEM projects.

About Us
Wenzhou Leheng Technology Co., Ltd.

Company Advantages

Experienced Manufacturer:

Established in 2012, we specialize in the development and manufacturing of thermostats, temperature limiters, rocker switches, and PCB thermostats.

Automated Production:

Standardized production lines and self-developed automated equipment support efficient assembly, testing, and consistent manufacturing quality.

Stable Production Capacity:

With monthly production exceeding 1 million units and annual output exceeding 12 million units, we support stable supply for B2B orders.

Global Supply:

Our products are exported to more than 80 countries and regions, supported by professional sales and order service.

Certificate Of Honor

We maintain strict quality control and hold certifications including UL, TUV, CE, CQC, KC, RoHS, REACH, SGS, ISO 9001, and ISO 14001. We hold multiple patents, and have participated in the development of national industry standards.
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