This SF6 & N₂ gas density relay with transmitter features 100mm IP65 protection, high precision temperature compensation, and multiple communication options. Ideal for monitoring SF6/N₂ gas in GIS, RMU and other high voltage power equipment.
The relay uses a metal bellows structure with standard SF6/N₂ mixed gas temperature compensation. It provides accurate readings even at extreme temperatures, making it suitable for low-temperature and harsh outdoor environments.
The SF6 gas density relay uses microswitch parts for its contacts. It has big contact load and low contact resistance. This makes the contacts work steady and last a long time, even when it runs very often.
This SF6 density monitor is made for industrial use. It can be made with oil inside or without oil. It can stand strong shake and impact. It uses many anti-interference methods, so it can work well in places with strong electric and magnetic signals, like 1000kV power stations.
This is an absolute pressure type SF6/N₂ gas density relay, so readings are not affected by altitude or atmospheric pressure changes. It provides accurate gas density monitoring regardless of the installation location.
The integrated transmitter supports multiple communication methods, including RS485 (Modbus protocol), 4-20mA, CAN, HART, fiber optic, and wireless communication. It meets IEC61850 and State Grid “Smart Substation Technical Specifications” for digital remote gauges.
The SF6 gas density relay with transmitter has an IP65 rated enclosure, offering excellent protection against dust and moisture. It is suitable for both indoor and outdoor installations in power stations and industrial facilities.
| Parameter | Details |
|---|---|
| Model | 7S-RDM-100-CQ15011A |
| Accuracy Class | Class 1.0 (at 20°C); Class 2.0 (at -40°C ~ 60°C) |
| Contact Rating | AC/DC 250V, 100VA/50W |
| Contact Resistance | ≤ 1.0 Ω |
| Sealing Performance | ≤ 1×10⁻⁸ mbar·L/s (helium leak test) |
| Vibration Resistance | 20 m/s² |
| Shock Resistance | 50g, 11ms |
| Contact Quantity | 1~3 pairs (up to 4 pairs optional), NO/NC configurable |
| Protection Grade | IP65 |
| Consistency | Pointer and transmitter data difference ≤ 0.02 MPa |
| Parameter | Details |
|---|---|
| Model | 7S-RDM-100-CQ15011A |
| Accuracy Class | Class 1.0 (full temperature range) |
| Working Power | DC 10~30V (≤ 2mA at DC24V) |
| Working Pressure | -0.1 ~ 0.9 MPa (gauge) / 0 ~ 1.1 MPa (absolute) |
| Temperature Compensation | -40°C ~ 80°C (gaseous) |
| Communication | RS485 (Modbus), 4-20mA, CAN, HART, fiber optic, wireless |
This SF6/N₂ gas density relay with transmitter is widely used in:
(1) SF6 Gas Insulated Switchgear (GIS)
(2) Ring Main Units (RMU)
(3) High voltage SF6 circuit breakers
(4) Transformer bushings and CT/PT equipment
(5) 1000kV ultra-high voltage power stations
(6) Smart substations requiring digital remote monitoring
Q: Can this relay run on SF6 gas and N₂ gas?
A: Yes. This product is made for systems using SF6 and N₂ gas together. It has special temperature adjustment for both gases.
Q: What communication methods can it use?
A: It can use RS485 (Modbus), 4-20mA, CAN, HART, optical fiber and wireless connection. It follows the IEC61850 standard and fits the need of smart power stations.
Q: Can it work in cold weather?
A: Yes. Its temperature adjustment can work as low as -40°C. It runs steadily in cold surroundings.
As an important protective part of power equipment, the SF6 density relay plays a vital role in medium voltage switchgear. Learn more about medium voltage switchgear key components and working principle for better equipment matching.
Xizienergy provides high-quality SF6 gas density relays and transmitters with full technical support. Contact us for custom configurations, pressure settings, and installation solutions for your power equipment.
