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KOBOLD Instruments Inc • 1801 Parkway View Drive • 15205 Pittsburgh, PA • Tel: +1 412 788 2830 • E-mail: info@koboldusa.com • visit koboldusa.com
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Bimetal Temperature Switch TWR
Switch point fixed:
+30 ... +120°C (in 5°C or 10°C steps)
Connection: G ¾ male thread, brass or stainless steel
Electrical connection: plug DIN 43 650
Accuracy:
30 ... 90°C ±5°C
100 ... 120°C ±7°C
Hysteresis: max. 20°C
![](https://www.kobold.com/images/layout/trans1x1.gif)
Datasheet
Operating Instructions
Miscellaneous
Downloads
Description
The KOBOLD temperature switches work with a bi-metal switch and serve to monitor temperature of liquids in piping and vessels. The instruments are available in brass or stainless steel and are screwed through a G ¾ screw-in thread into a screwed socket that is welded onto the line or vessel.
The temperature contacts have a fixed switch point in intervals of 5 °C in the range 30 °C ... 50 °C, and in intervals of 10 °C between 50 °C and 120 °C. They are available as N/C or N/O contacts. Standard electrical connection is made through a plug connector, in which a pilot lamp can be integrated as an additional output state indicator.
FAQs Bimetal Temperature Switch TWR: Questions and answers, professional knowledge directly from the manufacturer:
What is the Bimetal Temperature Switch TWR?
The TWR is a precision-engineered bimetal temperature switch designed for monitoring and controlling liquid temperatures in pipes and vessels. It features a durable brass or stainless-steel housing, suitable for various industrial applications.
How does the TWR Bimetal Temperature Switch work?
The TWR operates using a bimetallic element that bends in response to temperature changes. When the liquid's temperature reaches the pre-set switch point (available in fixed intervals of 5°C or 10°C), the bimetal element activates the electrical contact, opening or closing the circuit. The plug connector options, with an optional pilot lamp, ensure reliable performance and operational visibility.
What industries commonly use the TWR Bimetal Temperature Switch?
Oil & Gas: For monitoring process liquid temperatures in pipelines.
Chemical Processing: Ensures accurate control during temperature-sensitive reactions.
HVAC Systems: Regulates liquid temperatures for system efficiency.
Food & Beverage: Maintains precise temperature control during production.
Compressor Engineering: Prevents overheating of fluids in compressors.
Engine Control: Protects engines by monitoring coolant and lubricant temperatures.
General Industrial Applications: Widely used for temperature monitoring in pipelines and vessels.
Why is the TWR Bimetal Temperature Switch suitable for diverse installations?
Flexible Installation: The G ¾ male threaded connection ensures seamless integration.
Orientation Independence: Can be installed in any position without affecting functionality.
Durable Materials: Available in brass or stainless steel, making it robust for a variety of environments.
Can the TWR be used in hazardous environments?
Yes, the TWR is ATEX-certified for use in hazardous zones:
• Zones 2/22:
Gas Certification: II 3G Ex ic IIB/IIC T4 Gc.
Dust Certification: II 3D Ex ic IIIC T125 °C Dc.
• Zones 1/21: Suitable with an intrinsically safe isolating amplifier for enhanced safety in high-risk environments.
• Temperature Limits: Operates within -20°C to +90°C (ambient) and -30°C to +125°C (process), ensuring performance across extreme conditions.
What are the key advantages of the TWR switch?
Ease of Installation: G ¾ threaded connection for quick integration.
Mounting Flexibility: Can be installed in any orientation.
Robust Design: Brass and stainless steel housings provide durability in challenging environments.
ATEX Certification: Safe for use in hazardous zones.
Versatility: Compatible with a wide range of liquids in industrial applications.
Are there limitations to the TWR switch?
Fixed Switch Points: Limited to fixed intervals of 5°C or 10°C.
Hysteresis: Up to 20°C, which may not suit applications requiring fine temperature control.
Electrical Limitations: Restricted switching capacities for certain models.
Why is the housing material important?
The housing material ensures durability and corrosion resistance:
Brass: Ideal for standard applications.
Stainless Steel: Provides superior corrosion resistance, making it suitable for chemical and harsh environments.
Can the TWR be used with viscous or abrasive liquids?
Abrasive liquids may reduce the lifespan when installed in pipelines. However, the TWR is suitable for use with viscous media, such as oil.
How does the bimetal element work in the TWR?
The bimetal element bends with temperature changes, interrupting or closing the electrical circuit to ensure efficient and reliable temperature control.
Why are bimetal switches important for temperature control?
Bimetal switches provide accurate and reliable temperature regulation by detecting changes and triggering actions at pre-set thresholds, ensuring safety and efficiency in industrial processes.
Key Takeways of TWR - Bimetal Temperature Switch
• The TWR Bimetal Temperature Switch is a reliable, durable, and versatile solution for industrial temperature monitoring.
• Its ATEX certification, robust design, and wide temperature range make it ideal for diverse applications.
• Proper selection of materials and switch points ensures optimal performance and operational longevity.