Langsongkeli (Shanghai) Instrument Co., Ltd
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ZMJ100PRW Wireless Remote Transmission Density Relay
Used to monitor the density of SF6 gas in a sealed container, it can display the gas density on site and alarm when the density value reaches the set
Product details

Used for monitoring sealed containersSF6The density of gas can be displayed on site, and an alarm will be triggered when the density value reaches the set value.Real time remote transmission capabilitySF6Gas density change data, realizing online remote monitoring function.Suitable for monitoring high-voltage systems,Remote transmission of monitored signals through low-power, high anti-interference wireless communication methodsSF6Gas density data.We can provide various solutions such as supporting new substations and intelligent transformation of existing substations.




ZMJ100PRW无线远传式密度继电器


  • SF6Insulated composite electrical appliances(GIS)

  • SF6Insulated Circuit Breaker

  • SF6Insulated pole switch

  • SF6insulating transformer

  • SF6Insulation Transformer

  • SF6Insulated busbar system


1. Equipped with temperature compensation device for higher measurement accuracy

2. Suitable for different installation needs indoors and outdoors

3. selectAISI 304 stainless steelmakesealThe tableshell

4. selectAISI 316stainless steelmakegasroadconnecting member

5. Wireless communication, convenient on-site networking, no need for communication cables

6. Strong anti-interference ability and long transmission distance

7. Centered around the concentrator, autonomous wireless networking, the concentrator can be accessed throughRS485 outputs all monitoring data externally

8. Up to four pairs of contacts can be used to achieve multiple options such as overpressure alarm, bidirectional alarm, or bidirectional locking, making monitoring safer and more reliable


1. Shell diameter:100mm

2. Measurement range:-0.10.9MPa (customizable)

3. Measurement accuracy: (depends on the measurement range, andSF6For gaseous state

a)20°C: 1.0level,perhaps1.5level

b)-40°C~+60°C: 2.5level

4. Protection level:IP65

5. Working temperature:-40 ℃~+60 ℃, relative humidity ≤ 95% RH

6. Leakage rate:1×10-9Pa·m3/s (Helium leak detection)

7. Interface size:M201.5 (optional)Customized)

8. Installation method: radial or axial

9. Electrical connection: plug-in connectionM20 × 1.5 sealed head

Cable size: recommended1.5mm2,maximum2.5mm2

10. Insulation performance: Insulation resistance:>100 MW(500V DC)

Power frequency withstand voltage:2kV, 50/60 Hz 1min

11. Contact type: Magnetic assisted electric contact switch

80% silver, 20% nickel, 10 µ m gold plating

12. Impact level:50g (oil filled type), 30g (non oil filled type)

13. Electrical parameters of contacts:30W/50VA, 1A.(Maximum)

220VDC/380V 50/60Hz(Maximum)

14. Table glass: multi-layer safety glass

15. Weight:1.2kg

16. Pressure sensing component: imported Burton tube

17.Indoor forBending antenna type, outdoor suction cup antenna type


  • power-frequency withstand voltage2.5kV 50/60 Hz 1min

  • Refillable oil

  • Measurement mediumSF6Air、N2、SF6+N2Waiting for gas


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