China SF6 Gas Density Monitor from China Suppliers - Precision Leak Detection & Monitoring for High-Voltage Equipment Factory Manufacturer, Suppliers

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The SF6 Density Monitor is a highly accurate instrument specifically designed for monitoring the density of SF6 gas in high-voltage electrical equipment. This essential tool features automatic temperature compensation, dual alarm systems, and lockout capabilities, making it widely applicable in systems such as Gas Insulated Switchgear (GIS), circuit breakers, and transformers. As China’s leading suppliers and manufacturers of SF6 monitoring solutions, we ensure that our products meet the highest industry standards.

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In high-voltage power systems, sulfur hexafluoride (SFgas acts as both an insulating and arc-quenching medium due to its remarkable dielectric strength and thermal stability. However, any leakage or pressure drop in SF6 can severely undermine insulation performance and lead to costly equipment failures. Therefore, continuous monitoring of SF6 gas density is crucial for ensuring safe and reliable operation, surpassing the mere monitoring of pressure.

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To effectively manage temperature-induced pressure variations, our cutting-edge SF6 density monitors are equipped with bimetallic temperature compensation mechanisms. This ensures that the displayed density value accurately reflects the equivalent pressure at 20°C, regardless of fluctuating ambient conditions. Trust our factory in China for innovative solutions in SF6 monitoring, designed to enhance the reliability of your high-voltage power systems.

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Product Description

Product Specifications
Nominal size: 63mm
Scale range: -1 to 1 bar (customized)
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)
Pressure connector: G1/4", NPT 1/4", M20×1.5 (customized)
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; 220V DC / 380V 50/60Hz max
Window: Safety glass
Weight: 0.5 KG
Core Characteristics and Advantages
Temperature Compensation Automatically adjusts for thermal effects using bimetal strips or digital sensors, providing stable readings at varying temperatures.
Dual Set Points Configurable alarm and lockout contacts trigger signals when gas density drops below preset thresholds, enabling timely maintenance or system shutdown.
Robust Design Available in all-stainless steel construction with optional oil filling for enhanced shock and vibration resistance.
Remote Monitoring Capability Models with wireless transmission (e.g., LoRa) or RS485 output support integration into smart grid systems for real-time data access.
Typical Application Fields
High-Voltage Circuit Breakers Monitors SF6 levels during operation and triggers lockout if density falls below safety threshold.
Gas-Insulated Switchgear (GIS) Ensures long-term integrity of sealed compartments exposed to outdoor environments.
Transformers & Instrument Transformers Protects against internal faults caused by gas loss.
Frequently Asked Questions (FAQ)
Q What is the accuracy class of this SF6 density monitor at room temperature?
At 20℃, the monitor achieves Class 1.0 or 1.6 accuracy. Over the extended range of -20℃ to +60℃, it maintains Class 2.5, and from -30℃ to -20℃ it operates at Class 3.0.
Q Can the pressure connector type be customized?
Yes. The pressure connector is available in G1/4", NPT 1/4", and M20×1.5 configurations, all of which can be customized to match your specific installation requirements.
Q How does the temperature compensation feature work?
The monitor uses bimetal strips or integrated digital sensors to automatically compensate for thermal expansion and contraction effects, ensuring accurate and stable SF6 density readings across a wide temperature range (-30℃ to +60℃).
Q What does the IP65 protection rating mean for this device?
IP65 means the monitor is fully dust-tight and protected against low-pressure water jets from any direction. This makes it suitable for outdoor installations and harsh industrial environments such as GIS substations.
Q Does this monitor support remote monitoring or smart grid integration?
Yes. Select models are equipped with wireless transmission (e.g., LoRa) or RS485 output, enabling seamless integration into SCADA systems, smart grids, or IoT platforms for real-time SF6 density monitoring and remote alarm management.
Q What is the leakage rate specification and how is it tested?
The leakage rate is less than 1×10⁻⁹ Pa·m³/s, verified using a Helium mass spectrometer — one of the most sensitive leak detection methods available. This ensures the sealed integrity of the monitor over its full service life.

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