Refrigerator Magnetic Reed Switch Sensor

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Magnetic Reed Switch Door Sensor for Refrigerators and Freezers

Model：Magnetic Door Switch Sensor Series
Key Feature: Non-Contact Magnetic Switching
MOQ(Standard)：500 pcs
MOQ(Customized)：TBD
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Description

Model：Magnetic Door Switch Sensor Series

Key Feature: Non-Contact Magnetic Switching

MOQ(Standard)：500 pcs

MOQ(Customized)：TBD

Fucusens Solution

This magnetic reed switch sensor is designed to detect the open or closed position of refrigerator and freezer doors. The compact ABS housing supports screw mounting, while NO and NC contact options are available for different control requirements. Cable length, connector, housing dimensions and operating temperature range can be customized for appliance integration.

Our Capability	What It Solves	Value to Your Business
Magnetic Sensing Structure	Door position needs to be detected without mechanical contact	Simple open / close detection
Matched Magnet	Switch requires a defined magnetic trigger	More reliable switching
ABS Housing	Bare switching element cannot be installed directly	Better mechanical protection
PVC Cable	Controller is located away from sensing point	Flexible wiring
Custom Cable Length	Standard lead length does not fit equipment	Easier OEM integration
Connector on Request	Different equipment uses different interfaces	Reduced secondary wiring
Compact Mounting Structure	Limited installation space	Easier appliance integration
Custom Design Support	Different projects require different installation geometry	Better project matching

Typical Applications

Application	Typical Customer	Recommended Solution	Why This Configuration
Refrigerator Door Detection	Refrigerator and freezer manufacturers	Magnetic door switch sensor with matched magnet	Detects door open / closed position without mechanical contact
Home Appliances	Appliance manufacturers	Compact ABS magnetic proximity switch	Small housing supports appliance integration
Smart Furniture	Smart cabinet and furniture manufacturers	Magnetic door / window switch	Provides simple door-position detection
Security Systems	Security equipment manufacturers	Magnetic proximity switch	Suitable for door / window open-close monitoring
Industrial Equipment	Industrial control equipment manufacturers	Customized magnetic position switch	Detects cover, panel or component position
Smart Toys / Small Devices	Electronic product manufacturers	Compact magnetic switch sensor	Simple passive switching supports small devices

Product Structure & Selection Guide

Application — Confirm whether the sensor is used for refrigerator door, cabinet, equipment cover, appliance or another position-detection function.

Trigger Position — Confirm where the magnet and sensor will be installed.

Trigger Distance — Confirm the required switching gap between the magnet and sensor.

Contact Requirement — Confirm the contact logic and electrical load required by the controller.

Housing Size — Check available installation space.

Cable Length — Match the distance from sensor to controller.

Connector — Match the existing wiring harness or control board.

Mounting Hole Position — Confirm mounting dimensions before sample production.

3 Common Mistakes When Selecting a Magnetic Door Switch

1. Looking Only at the Sensor Housing — A magnetic door switch works together with its magnet. Better: Confirm the sensor + magnet + installation gap as one system.

2. Ignoring the Trigger Distance — Even if the housing fits, incorrect sensor-to-magnet distance may cause unreliable switching. Better: Confirm the actual installation gap and magnet position.

3. Focusing Only on Cable Length — Electrical load, connector and switching logic must also match the controller. Better: Evaluate the complete switch + magnet + cable + connector + mounting configuration.

From Magnetic Switch Element to a Ready-to-Install Door Sensor

A magnetic switch element alone is not enough for direct equipment installation. The complete sensor also needs to match:

Switch Element + Magnet + Housing + Cable + Connector + Mounting + Trigger Position

Our Capability	What It Solves	Value to Your Business
Magnetic Sensing Structure	Door position needs to be detected without mechanical contact	Simple open / close detection
Matched Magnet	Switch requires a defined magnetic trigger	More reliable switching
ABS Housing	Bare switching element cannot be installed directly	Better mechanical protection
PVC Cable	Controller is located away from sensing point	Flexible wiring
Custom Cable Length	Standard lead length does not fit equipment	Easier OEM integration
Connector on Request	Different equipment uses different interfaces	Reduced secondary wiring
Compact Mounting Structure	Limited installation space	Easier appliance integration
Custom Design Support	Different projects require different installation geometry	Better project matching

Application	Typical Customer	Recommended Solution	Why This Configuration
Refrigerator Door Detection	Refrigerator and freezer manufacturers	Magnetic door switch sensor with matched magnet	Detects door open / closed position without mechanical contact
Home Appliances	Appliance manufacturers	Compact ABS magnetic proximity switch	Small housing supports appliance integration
Smart Furniture	Smart cabinet and furniture manufacturers	Magnetic door / window switch	Provides simple door-position detection
Security Systems	Security equipment manufacturers	Magnetic proximity switch	Suitable for door / window open-close monitoring
Industrial Equipment	Industrial control equipment manufacturers	Customized magnetic position switch	Detects cover, panel or component position
Smart Toys / Small Devices	Electronic product manufacturers	Compact magnetic switch sensor	Simple passive switching supports small devices

Typical Dimensions

Housing Length — 34 mm

Housing Height — 14 mm

Mounting Hole Spacing — 17 mm

Mounting Hole — Ø4 mm

Housing Thickness / Side Dimension — approx. 7.6 mm

Cable Length — L, according to customer requirement

The sensor assembly also includes a cable section with heat-shrink tubing and connector termination. Final dimensions should be confirmed according to the approved drawing.

How the Magnetic Door Switch Works

The sensor detects a change in the magnetic field created by the movement of the magnet relative to the switch. When the magnet moves into the required sensing position, the internal contact changes state. When the magnet moves away, the contact returns according to the switch configuration.

Sensor Construction & Selection Guide

Application — Confirm whether the sensor is used for refrigerator door, cabinet, equipment cover, appliance or another position-detection function.

Trigger Position — Confirm where the magnet and sensor will be installed.

Trigger Distance — Confirm the required switching gap between the magnet and sensor.

Contact Requirement — Confirm the contact logic and electrical load required by the controller.

Housing Size — Check available installation space.

Cable Length — Match the distance from sensor to controller.

Connector — Match the existing wiring harness or control board.

Mounting Hole Position — Confirm mounting dimensions before sample production.

3 Common Mistakes When Selecting a Magnetic Door Switch

1. Choosing the Output Before Checking the Controller

A 4-20mA transmitter cannot directly replace a voltage-output transmitter if the controller input is different. Better: confirm the controller input and transmitter output together.

2. Ignoring the Temperature Range

Different configurations support different temperature ranges. Better: select the transmitter range according to the actual minimum and maximum environmental temperature.

3. Looking Only at Temperature Accuracy

This is a combined temperature and humidity transmitter. Better: evaluate Temperature Accuracy + RH Accuracy + Output + Response + Installation Environment as one complete solution.

RTD Performance Depends on Both the Sensing Element and the Complete Probe

A reliable RTD temperature probe requires: Stable RTD Element + Correct Probe Structure + Electrical Insulation + Cable Connection + Mechanical Consistency.

Incoming Material Inspection

· Magnetic switch element checked according to specification

· NdFeB magnet checked according to required configuration

· ABS housing inspected before assembly

· PVC cable verified

· Connector components checked when required

Process Control

· Switch element positioned correctly inside the housing

· Magnet and sensor matching checked

· Cable connection controlled during assembly

· Housing and cable exit inspected

· Product dimensions verified against the approved drawing

If You Are an Equipment Manufacturer / OEM

Common Problem	What It Means for Your Business
Controller input does not match the transmitter output	Additional signal conversion may be required
Separate temperature and humidity sensors increase installation work	More devices, wiring and installation points are needed
Standard temperature range does not fit the project	Measurement performance may not match actual environmental conditions
No local display is available	Commissioning and maintenance become less convenient
Housing protection is insufficient	Humidity and dust can affect long-term operation
Wiring mode does not match the control system	Installation and commissioning time increases

If You Are a Distributor / Importer

Common Problem	What It Means for Your Business
Customers require different analog outputs	One fixed-output product cannot cover all projects
Different projects use different temperature ranges	More configuration flexibility is required
Some customers require LCD and others do not	A single fixed version limits project coverage
BMS and PLC interfaces differ between customers	Technical matching is required before quotation
Customers want a complete assembly	Housing, output and wiring become part of the purchasing decision

Sample Support

Standard Samples — Available according to current specification and stock.

Magnet Matching — Matched NdFeB magnet according to sensor configuration.

Cable Customization — Length according to equipment requirements.

Connector Matching — According to controller or wiring harness.

Housing / Mounting Review — According to equipment installation space.

Application Support — Support for refrigerator, appliance, furniture and industrial position detection.

Sample Validation Before Mass Production

We recommend checking: Switch Function → Magnet Position → Trigger Distance → Mounting → Contact Resistance → Cable → Connector

For OEM projects, the sensor and magnet should be tested in the actual installation position before mass production.

Quality Assurance

Switch Function — Checked according to confirmed specification.

Magnet Matching — Verified with the selected sensor configuration.

Housing Dimensions — According to approved drawing.

Cable Length — According to confirmed specification.

Connector — According to equipment interface.

Customized Products — Specification confirmed before production.

Finished Assembly — Functional inspection before shipment.

MOQ & Lead Time

Standard Product MOQ — Contact us for current MOQ.

Customized MOQ — Depends on cable, connector and mounting requirements.

Standard Lead Time — Contact us for current production schedule.

Customized Lead Time — Depends on the required sensor configuration.

Sample Lead Time — Confirmed after specification review.

Cooperation Process: Application Review → Switch Requirement → Magnet / Trigger Distance → Housing / Mounting → Cable / Connector → Drawing Confirmation → Sample Testing → Pilot Order → Mass Production

Q1. What is a magnetic door switch sensor?

It is a magnetic proximity switch used to detect the relative position of a door, cover or moving component.

Q2. Does the sensor require mechanical contact?

The switching action is triggered by the magnetic field between the sensor and magnet rather than by directly pressing a mechanical button.

Q3. What is the working temperature?

According to the supplied product data: -30°C to +80°C.

Q4. What housing material is used?

The supplied specification lists ABS, Black or White.

Q5. What magnet is used?

The supplied product information lists an NdFeB Magnet.

Q6. What is the typical housing size?

The supplied specification lists approximately 14 × 34 mm.