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BELONG Sensor Logo BELONG Sensor

Precision Float Switches &
Temperature Sensors

Trusted manufacturer of high-reliability stainless steel and plastic float switches, proximity switches, and NTC/PTC thermistors for industrial, automotive, HVAC, and home appliance applications.

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About BELONG Sensor

BELONG is a leading manufacturer of reed switch-based sensors, specializing in float switches and temperature sensing solutions. With years of engineering expertise, we deliver reliable, durable, and precision-engineered components trusted across global industries.

Our NTC/PTC temperature sensors are widely used in automotive systems, home appliances (coffee makers, washing machines, air conditioners), medical devices, and HVAC systems—offering a wide temperature range, rapid response time, high IP grade, and long-term stability.

10+
Years Experience
50+
Products
Stainless Steel Float Switch

Our Product Range

High-performance float switches and temperature sensors designed for reliability, durability, and precision in demanding environments.

Plastic Float Switch BLMF-40I

Plastic Float Switch BLMF-40I

  • Reed switch technology
  • Switching current: 1A
  • Power rating: 4W
  • Contact form: NO/NC
  • Material: High-grade plastic
Stainless Steel Float Switch BLMF-80SI

Stainless Steel Float Switch BLMF-80SI

  • Material: SUS304 Stainless Steel
  • Stem Length: 80mm
  • Float OD: 27mm
  • Electrical: 50W, 200Vdc, 0.7A
  • Mounting: M10*1.5 Horizontal
Plastic Float Switch BLMF-100I

Plastic Float Switch BLMF-100I

  • Reed switch actuated
  • Switching current: 1A
  • Power rating: 4W
  • Contact: Normally Open/Closed
  • Durable plastic housing
Stainless Steel Float Switch BLMF-VHS

Stainless Steel Float Switch BLMF-VHS

  • Material: SUS304
  • Stem Length: 97.2mm / 55.4mm
  • Electrical: 50W, 200Vdc, 0.7A
  • Mounting: M10*1.5 Horizontal
  • NO/NC/Float Reversible
Plastic Float Switch BLMF-85I

Plastic Float Switch BLMF-85I

  • Reed switch technology
  • Switching current: 1A
  • Power rating: 4W
  • Contact form: NO/NC
  • Compact design for tight spaces
Proximity Switch BLPS-23L

Proximity Switch BLPS-23L

  • Rectangular ABS casing
  • Dimensions: 23x14.5x6mm
  • Max: 100Vdc, 0.5A
  • Wire length: 350mm (customizable)
  • Excellent lifetime & reliability
Stainless Steel Float Switch BLMF-135SI

Stainless Steel Float Switch BLMF-135SI

  • Material: SUS304
  • Stem Length: 135mm
  • Float OD: 28mm
  • Electrical: 70W, 350Vdc, 0.7A
  • Horizontal mounting
NTC Thermistor BL3 Series

NTC Thermistor BL3 Series

  • Temperature sensing
  • High accuracy & stability
  • Used in HVAC & appliances
  • Wide operating range
  • Compact and reliable
PTC Thermistor A Series

PTC Thermistor A Series

  • Overcurrent protection
  • Self-regulating heating
  • High reliability
  • Used in motor start & control
  • Multiple resistance values
Proximity Switch BLPS-30L

Proximity Switch BLPS-30L

  • Rectangular ABS housing
  • Dimensions: 29x19x7mm
  • Max: 100Vdc, 0.5A
  • Screw driving terminal
  • Custom wire length available
IR Non-Contact Sensor

IR Non-Contact Temperature Sensor

  • Infrared sensing technology
  • No physical contact required
  • Fast response time
  • Ideal for medical & industrial use
  • High precision measurement
Stainless Steel Float Switch BLMF-180SI

Stainless Steel Float Switch BLMF-180SI

  • Material: SUS304
  • Stem Length: 180mm
  • Float OD: 28mm
  • Electrical: 70W, 300Vdc, 0.7A
  • Horizontal mounting
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Why Choose BELONG?

Engineered for performance, durability, and precision across critical applications.

🔧

High Reliability

Our reed switches and sensors are built for long life and consistent performance in harsh environments.

🛡️

Durable Materials

Stainless steel (SUS304) and high-grade plastics ensure resistance to corrosion and wear.

🌡️

Precision Sensing

Fast response time and high accuracy for temperature and liquid level monitoring.

🌍

Global Applications

Used in automotive, HVAC, medical, and home appliances worldwide.

50+
Products Manufactured
10+
Years of Experience
30+
Global Clients

Frequently Asked Questions

What types of float switches do you offer?

We manufacture both stainless steel and plastic float switches with reed switch technology, available in various stem lengths, mounting options, and electrical ratings.

Are your sensors suitable for food-grade applications?

Our stainless steel float switches (SUS304) are corrosion-resistant and suitable for many industrial and clean environments. For food-grade certification, please contact us with specific requirements.

Can I customize the wire length or connector type?

Yes, we offer customization for wire length, terminal types, and other specifications. Contact us with your requirements for a quote.

What is the operating temperature range of your NTC/PTC sensors?

Our thermistors operate across a wide temperature range, typically from -40°C to +150°C, depending on the series and application.

Get in Touch

For product inquiries, technical support, or custom solutions, visit our official website to connect with our team.

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