OEM China SF6 Gas Density Monitor Factory - Leak Detection & Monitoring Solutions from Trusted Suppliers Supplier, Factories

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The SF6 Density Monitor is a high-precision instrument crucial for monitoring SF6 gas density in high-voltage electrical equipment. As a leading product from reputable China suppliers, this device features automatic temperature compensation, dual alarm, and lockout functions, making it ideal for applications in Gas Insulated Switchgear (GIS), circuit breakers, and transformers.

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Specifically designed for high-voltage power systems, the SF6 Density Monitor safeguards the performance of sulfur hexafluoride (SFgas, which acts as an effective insulating and arc-quenching medium due to its remarkable dielectric strength and thermal stability. The need for reliable monitoring is underscored, as any leakage or pressure drop can jeopardize insulation performance and lead to costly equipment failures. Thus, continuous tracking of SF6 gas density—beyond simple pressure measurements—is essential for ensuring safe and dependable operation.

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Modern SF6 density relays equipped with bimetallic temperature compensation mechanisms are designed to counteract temperature-induced pressure fluctuations. This ensures that the displayed values accurately represent the equivalent pressure at 20°C, independent of ambient conditions. Trust in our factory's expertise to provide the high-quality SF6 Density Monitor that meets your operational needs.

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Product Description

Product Specifications

Nominal Size 63mm
Scale Range -1 to 1 bar (Customizable)
Accuracy 20℃: Class 1.0 or 1.6; -20℃ to +60℃: Class 2.5; -30℃ to -20℃: Class 3.0
Degree of Protection IP65
Ambient Conditions -30℃ to +60℃
Leakage Rate < 1*10⁻⁹ Pa.m³/s (Helium mass spectrometer verified)
Pressure Connector G1/4", NPT 1/4", M20*1.5 (Customizable)
Connector Location Center back
Electrical Connection Compact pluggable box with M20*1.5 cable gland
Cable Size 1.5mm² (Recommended); 2.5mm² (Maximum)
Insulation Properties Insulation resistance >100 MΩ (500V DC); Withstand voltage 2kV, 50/60 Hz 1 min (to case)
Contact Type Pointer driven magnetic snap action signal contacts; 80%Ag, 20%Ni, 10μm Au plated
Contact Ratings 30W/50VA, 1A max; 220VDC/380V 50/60Hz max
Window Material Safety glass
Weight 0.5 KG

Core Characteristics & Key Advantages

Temperature Compensation

Automatically adjusts for thermal expansion effects using bimetal strips or digital sensors, providing highly accurate and stable readings across varying operating temperatures.

Dual Set Points

Configurable alarm and lockout contacts trigger emergency signals when gas density drops below preset thresholds, enabling timely preventative maintenance or automated system shutdown.

Robust Industrial Design

Constructed with high-grade stainless steel featuring optional silicone oil filling for significantly enhanced shock and vibration resistance in extreme environments.

Remote Monitoring Ready

Optional integration with RS485 digital output or wireless transmission protocols (e.g., LoRa) to seamlessly connect with smart grid management systems for real-time monitoring.

Typical Application Fields

High-Voltage Circuit Breakers

Continuous monitoring of SF6 gas levels during high-voltage operations to trigger automatic lockouts if gas density drops below safety limits.

Gas-Insulated Switchgear (GIS)

Ensures long-term hermetic sealing and operational safety of critical GIS compartments exposed to harsh ambient conditions.

Transformers & Instrument Transformers

Provides crucial protection against severe internal electrical faults caused by gradual gas loss or pressure drops over time.

Frequently Asked Questions (FAQ)

What is the primary application of this gas density monitor?
This monitor is specifically engineered to measure and track SF6 gas density in critical high-voltage electrical power equipment, such as High-Voltage Circuit Breakers, Gas-Insulated Switchgear (GIS), and Power Transformers, preventing equipment failure caused by gas leaks.
How does the internal temperature compensation mechanism work?
The device employs built-in bimetal compensation structures or advanced digital sensors. These components automatically adjust pressure measurements to account for temperature-induced gas expansion or contraction, ensuring accurate density readings regardless of ambient fluctuations (-30℃ to +60℃).
What is the sealing integrity and protection rating of the device?
The monitor features an ultra-low leakage rate of less than 1*10⁻⁹ Pa.m³/s, strictly verified by Helium mass spectrometry. It is built to IP65 protection standards, offering full defense against ingress of dust and water jets.
Can this gas density monitor integrate with smart grids remotely?
Yes, selected instrument models can be integrated into remote monitoring architectures. They support RS485 communication interfaces or wireless protocols such as LoRa, enabling seamless remote transmission of gas status to central control rooms.
What are the switch contact ratings and electrical insulation capabilities?
Equipped with pointer-driven magnetic snap-action signal contacts (80% Ag, 20% Ni with 10μm gold plating), the switch handles maximum contact ratings of 30W/50VA (1A max, 220VDC/380V max). Insulation resistance exceeds 100 MΩ at 500V DC, with a dielectric withstand voltage of 2kV (50/60 Hz for 1 min to case).
What pressure connection and mounting options are customizable?
Standard pressure connectors include G1/4", NPT 1/4", and M20*1.5 with a center-back mounting location. Custom connector types, thread specs, and electrical connection variations can be customized upon request.

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