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Use Code DANFOSS10 for 10% off Danfoss Refrigeration Parts
Use Code DANFOSS10 for 10% off Danfoss Refrigeration Parts

Sight Glass

Buy industrial refrigeration sight glasses online to gain crystal-clear visibility into your system's operation. Our comprehensive selection features high-quality sight glasses and liquid level indicators from industry leaders Danfoss and Parker, designed to withstand the rigors of industrial refrigeration environments. Explore our range of liquid level glasses in various sizes, from compact 185mm models to expansive 1550mm versions, suitable for different system capacities and configurations. Whether you're installing new equipment, upgrading existing systems, or replacing worn components, our sight glasses provide the essential visual monitoring you need for optimal system management

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  • Parker Refrigerating Specialties: SGHT GLS ASM,4 SADDLE MOUNT DN

    Parker
    Original price $277.64 - Original price $277.64
    Original price
    $277.64
    $277.64 - $277.64
    Current price $277.64

    SGHT GLS ASM,4 SADDLE MOUNT DN

  • Danfoss LLG 185 Liquid Level Glasses

    Danfoss
    Original price $787.95 - Original price $787.95
    Original price
    $787.95
    $787.95 - $787.95
    Current price $787.95

    The Danfoss LLG 185 Liquid Level Glasses are engineered to provide accurate and reliable liquid level monitoring in industrial systems. Their robus...

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  • Danfoss LLG 335 Liquid Level Glasses

    Danfoss
    Original price $1,038.53 - Original price $1,038.53
    Original price
    $1,038.53
    $1,038.53 - $1,038.53
    Current price $1,038.53

    The Danfoss LLG 335 Liquid Level Glasses offer precise monitoring of liquid levels, ensuring efficient system management. Built for durability, the...

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  • Danfoss LLG 590 Liquid Level Glasses

    Danfoss
    Original price $1,764.13 - Original price $1,764.13
    Original price
    $1,764.13
    $1,764.13 - $1,764.13
    Current price $1,764.13

    The Danfoss LLG 590 Liquid Level Glasses provide dependable monitoring of liquid levels in industrial systems. Their durable design ensures long-la...

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  • Danfoss LLG 740 Liquid Level Glasses

    Danfoss
    Original price $2,153.02 - Original price $2,153.02
    Original price
    $2,153.02
    $2,153.02 - $2,153.02
    Current price $2,153.02

    The Danfoss LLG 740 Liquid Level Glasses are designed for accurate monitoring of liquid levels in industrial systems. Their robust construction ens...

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  • Danfoss LLG 995 Liquid Level Glasses

    Danfoss
    Original price $2,512.42 - Original price $2,512.42
    Original price
    $2,512.42
    $2,512.42 - $2,512.42
    Current price $2,512.42

    The Danfoss LLG 995 Liquid Level Glasses offer reliable and accurate monitoring of liquid levels, essential for effective system management. Their ...

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  • Danfoss LLG 1145 Liquid Level Glasses

    Danfoss
    Original price $3,004.49 - Original price $3,004.49
    Original price
    $3,004.49
    $3,004.49 - $3,004.49
    Current price $3,004.49

    The Danfoss LLG 1145 Liquid Level Glasses are engineered to provide accurate and reliable monitoring of liquid levels in industrial systems. Their ...

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  • Danfoss LLG 1550 Liquid Level Glasses

    Danfoss
    Original price $4,369.53 - Original price $4,369.53
    Original price
    $4,369.53
    $4,369.53 - $4,369.53
    Current price $4,369.53

    The Danfoss LLG 1550 Liquid Level Glasses provide dependable monitoring of liquid levels, ensuring efficient management of industrial systems. Thei...

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  • Danfoss LLG 590 S Liquid Level Glasses

    Danfoss
    Original price $2,523.78 - Original price $2,523.78
    Original price
    $2,523.78
    $2,523.78 - $2,523.78
    Current price $2,523.78

    The Danfoss LLG 590 S Liquid Level Glasses are built for precision and reliability in monitoring liquid levels. These glasses offer clear visibilit...

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  • Danfoss LLG 740 S Liquid Level Glasses

    Danfoss
    Original price $2,981.80 - Original price $2,981.80
    Original price
    $2,981.80
    $2,981.80 - $2,981.80
    Current price $2,981.80

    The Danfoss LLG 740 S Liquid Level Glasses are designed for accurate monitoring of liquid levels in industrial systems. Their robust construction e...

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  • Danfoss LLG 995 S Liquid Level Glasses

    Danfoss
    Original price $3,353.66 - Original price $3,353.66
    Original price
    $3,353.66
    $3,353.66 - $3,353.66
    Current price $3,353.66

    The Danfoss LLG 995 S Liquid Level Glasses are engineered to provide accurate and reliable liquid level monitoring in various systems. Built to las...

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  • Danfoss LLG 1145 S Liquid Level Glasses

    Danfoss
    Original price $3,955.72 - Original price $3,955.72
    Original price
    $3,955.72
    $3,955.72 - $3,955.72
    Current price $3,955.72

    The Danfoss LLG 1145 S Liquid Level Glasses provide clear and reliable monitoring of liquid levels. Their durable construction ensures they can wit...

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  • Danfoss LLG 1550 S Liquid Level Glasses

    Danfoss
    Original price $5,266.33 - Original price $5,266.33
    Original price
    $5,266.33
    $5,266.33 - $5,266.33
    Current price $5,266.33

    The Danfoss LLG 1550 S Liquid Level Glasses are built to deliver accurate and consistent monitoring of liquid levels. Their robust design ensures d...

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  • Danfoss LLG 995 SF Liquid Level Glasses

    Danfoss
    Original price $4,103.10 - Original price $4,103.10
    Original price
    $4,103.10
    $4,103.10 - $4,103.10
    Current price $4,103.10

    The Danfoss LLG 995 SF Liquid Level Glasses are designed for superior performance in monitoring liquid levels. With a sturdy design and clear visib...

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  • Danfoss LLG 335 F Liquid Level Glasses

    Danfoss
    Original price $1,414.92 - Original price $1,414.92
    Original price
    $1,414.92
    $1,414.92 - $1,414.92
    Current price $1,414.92

    The Danfoss LLG 335 F Liquid Level Glasses offer precise monitoring of liquid levels, ensuring efficient system management. Built for durability, t...

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  • Danfoss LLG 590 F Liquid Level Glasses

    Danfoss
    Original price $2,386.58 - Original price $2,386.58
    Original price
    $2,386.58
    $2,386.58 - $2,386.58
    Current price $2,386.58

    The Danfoss LLG 590 F Liquid Level Glasses provide dependable monitoring of liquid levels in industrial systems. Their durable design ensures long-...

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  • Danfoss LLG 740 F Liquid Level Glasses

    Danfoss
    Original price $2,808.35 - Original price $2,808.35
    Original price
    $2,808.35
    $2,808.35 - $2,808.35
    Current price $2,808.35

    The Danfoss LLG 740 F Liquid Level Glasses are designed to provide accurate and clear monitoring of liquid levels. Built to last, they offer reliab...

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  • Danfoss LLG 995 F Liquid Level Glasses

    Danfoss
    Original price $3,204.02 - Original price $3,204.02
    Original price
    $3,204.02
    $3,204.02 - $3,204.02
    Current price $3,204.02

    The Danfoss LLG 995 F Liquid Level Glasses offer reliable monitoring of liquid levels in various industrial systems. Their sturdy construction ensu...

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  • Danfoss LLG 1145 F Liquid Level Glasses

    Danfoss
    Original price $3,682.46 - Original price $3,682.46
    Original price
    $3,682.46
    $3,682.46 - $3,682.46
    Current price $3,682.46

    The Danfoss LLG 1145 F Liquid Level Glasses are designed to provide clear and accurate monitoring of liquid levels. Their robust design ensures dur...

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  • Danfoss LLG 1550 F Liquid Level Glasses

    Danfoss
    Original price $5,106.48 - Original price $5,106.48
    Original price
    $5,106.48
    $5,106.48 - $5,106.48
    Current price $5,106.48

    The Danfoss LLG 1550 F Liquid Level Glasses are essential for monitoring liquid levels in various systems. With their durable construction and clea...

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  • Danfoss 3/4'' G Sight Glass Socket Type SGR

    Danfoss
    Original price $34.76 - Original price $34.76
    Original price
    $34.76
    $34.76 - $34.76
    Current price $34.76

    This Danfoss sight glass is designed for 3/4'' connections, offering clear visual monitoring of refrigerant flow in your system. The socket-type SG...

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  • Danfoss Spare Part Sight Glass LLG 185

    Danfoss
    Original price $272.09 - Original price $272.09
    Original price
    $272.09
    $272.09 - $272.09
    Current price $272.09

    The Danfoss Spare Part Sight Glass LLG 185 is designed for clear and accurate liquid level monitoring in industrial applications. This sight glass ...

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  • Danfoss LLG 590 Sight Glass Spare Part

    Danfoss
    Original price $311.78 - Original price $311.78
    Original price
    $311.78
    $311.78 - $311.78
    Current price $311.78

    The Danfoss LLG 590 Sight Glass Spare Part is a critical component for maintaining the accuracy and visibility of liquid level gauges in industrial...

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  • Danfoss LLG F SF 185 Sight Adapter Spare Part

    Danfoss
    Original price $448.96 - Original price $448.96
    Original price
    $448.96
    $448.96 - $448.96
    Current price $448.96

    The Danfoss LLG F SF 185 Sight Adapter Spare Part is designed to enhance the performance of liquid level gauges in industrial settings. This adapte...

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Frequently Asked Questions (FAQs) about Refrigerant Sight Glasses

What is a sight glass?

A sight glass is a transparent tube or window installed in equipment like refrigeration systems, boilers, or pipelines, allowing operators to visually check the level or flow of liquid inside. It helps monitor fluid levels, flow rates, and detect contaminants.

Why are sight glasses essential in industrial refrigeration systems?

Sight glasses provide a direct visual indication of refrigerant levels and flow within the system. This immediate feedback is crucial for monitoring system performance, detecting potential issues like low refrigerant levels, and ensuring optimal operation without the need for complex instrumentation.

What's the difference between standard LLG and LLG S series from Danfoss?

The standard LLG (Liquid Level Glass) series is designed for general use in refrigeration systems. The LLG S series typically includes additional features such as scale markings for more precise level readings or enhanced durability for more demanding applications. Always check the specific product details for exact features.

How do I choose the right size of liquid level glass for my system?

The size of the liquid level glass should correspond to the height of the vessel it's monitoring. For example, a taller receiver would require a longer sight glass like the Danfoss LLG 1550, while a smaller system might only need an LLG 185. Consider the normal operating range of liquid levels in your system when selecting the appropriate size.

What does the 'F' designation mean in some Danfoss LLG models?

The 'F' designation typically indicates that the sight glass is equipped with a flanged connection, as opposed to threaded or welded connections. Flanged connections can offer easier installation and maintenance in certain system designs.

How often should sight glasses be inspected or replaced?

Sight glasses should be visually inspected regularly as part of routine system checks. Look for signs of wear, cloudiness, or damage that could impair visibility. While high-quality sight glasses can last for many years, they should be replaced immediately if any cracks or leaks are detected, or if visibility becomes significantly impaired.

Can sight glasses be used with all types of refrigerants?

Most industrial-grade sight glasses are compatible with a wide range of refrigerants. However, it's crucial to verify compatibility, especially with newer refrigerants or in high-pressure systems like those using CO2. Always check the manufacturer's specifications for refrigerant compatibility before installation.

What's the purpose of a saddle mount sight glass like the Parker 4" Saddle Mount?

Saddle mount sight glasses are designed to be installed on the side of pipes or vessels. They provide a convenient way to observe refrigerant flow or levels in horizontal runs of piping or in locations where a full-length sight glass isn't necessary or practical.

Are there any safety considerations when using sight glasses?

Sight glasses are a potential weak point in high-pressure systems, so proper installation and regular inspection are crucial. Ensure that the sight glass is rated for your system's pressure and temperature range. Some models may include protective shields or be constructed with safety glass to minimize risks in case of failure. Always follow manufacturer guidelines and local safety regulations when installing and using sight glasses.

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