Product Overview

The Temperature Switch NC20 is a mechanical temperature control device designed for reliable temperature monitoring in industrial applications. It uses a bimetal sensing element that expands when the preset temperature is reached, triggering the built-in switching mechanism to generate an electrical switching signal.

The medium-contacting components are manufactured from HPb59-1 brass, providing dependable performance for hydraulic, lubrication, and transmission systems. Multiple process connection threads, including G1/4, G3/8, and M22 × 1.5, are available to meet different installation requirements.

With a compact structure, IP65 protection, and fixed switching points ranging from 30°C to 120°C, the NC20 is suitable for monitoring whether system temperatures exceed preset maximum or minimum limits.

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Product Features

• Mechanical bimetal sensing technology
• Fixed switching points from 30°C to 120°C
• Reliable temperature limit monitoring
• Suitable for hydraulic, lubrication, and transmission systems
• Brass wetted parts (HPb59-1)
• Available with Normally Open (NO) or Normally Closed (NC) contacts
• Silver-plated contacts for dependable switching performance
• Supports G1/4, G3/8, and M22 × 1.5 process connections
• IP65 protection rating
• Compact and durable design

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Applications

Industries

• Hydraulic Equipment
• Lubrication Systems
• Transmission Systems
• Industrial Machinery
• Process Equipment

Typical Applications

• Hydraulic oil temperature monitoring
• Lubrication system temperature protection
• Transmission temperature monitoring
• Industrial equipment temperature control
• High and low temperature limit detection

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Technical Specifications

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Size chart（mm)

Wiring diagram

Why Choose the Temperature Switch NC20?

Reliable temperature monitoring helps protect industrial equipment from overheating or abnormal operating conditions. The NC20 combines a proven mechanical bimetal sensing mechanism with a compact industrial design to provide dependable temperature switching for hydraulic and lubrication systems.

Reliable Mechanical Switching

The bimetal element expands at the preset temperature and actuates the internal switch without requiring complex electronic circuitry.

Multiple Switching Options

Available with Normally Open (NO) or Normally Closed (NC) contacts to meet different control requirements.

Flexible Installation

Supports multiple standard thread connections, making installation convenient for various industrial systems.

Durable Industrial Construction

Brass wetted parts, silver-plated contacts, and an IP65 enclosure provide reliable operation in industrial environments.

Suitable for Temperature Protection

Designed for detecting whether system temperature exceeds preset upper or lower limits in hydraulic, lubrication, and transmission applications.

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Application Case

Temperature Protection for Hydraulic Power Units

In hydraulic power units, excessive oil temperature may affect system performance and equipment reliability. The NC20 Temperature Switch can be installed directly on the hydraulic oil circuit to monitor whether the oil temperature reaches a predetermined switching point.

When the medium temperature reaches the preset value, the internal bimetal sensing element expands and actuates the switch, generating an electrical signal. The signal can be connected to a PLC, relay, or control system to activate an alarm, stop equipment, or initiate other protective control actions according to system requirements.

With a maximum operating pressure of 100 bar, media temperatures up to 130°C, and IP65 protection, the NC20 is suitable for hydraulic systems, lubrication equipment, transmission systems, and industrial machinery requiring reliable temperature limit monitoring.

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Frequently Asked Questions (FAQ)

1. How does the Temperature Switch NC20 work?

The switch uses a mechanical bimetal element that expands when the preset temperature is reached, activating the internal switching mechanism.

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2. What temperature range is available?

Fixed switching points are available from 30°C to 120°C.

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3. What output options are provided?

The switch is available with:

• Normally Open (NO)
• Normally Closed (NC)

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4. What is the maximum operating pressure?

The maximum working pressure is 100 bar.

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5. What is the maximum media temperature?

The maximum allowable media temperature is 130°C.

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6. Which thread connections are available?

The NC20 supports:

• G1/4
• G3/8
• M22 × 1.5

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7. What industries is this switch suitable for?

It is suitable for hydraulic systems, lubrication systems, transmission equipment, industrial machinery, and other temperature monitoring applications.

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8. What is the protection rating?

The NC20 has an IP65 protection rating for industrial operating environments.