Langsongkeli (Shanghai) Instrument Co., Ltd
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ZMJ100PRO Fiber Optic Remote Transmission Density Relay
Using optical fiber as the communication medium to remotely monitor the density of SF6 gas in the density container, an alarm is triggered when the de
Product details

Using optical fiber as a communication medium for remote monitoring of density in containersSF6Gas density, alarm when the density value reaches the set value, with real-time remote transmissionSF6Gas density data, realizing online remote monitoring function. Suitable for monitoring high-voltage systems, achieving online remote monitoring function. We can provide various solutions such as supporting new substations and intelligent transformation of existing substations.



ZMJ100PRO光纤远传式密度继电器

  • 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.Fiber optic communication interface, with large data capacity, fast communication speed, strong adaptability, and long service life

3.Strong anti-interference ability, especially suitable for environments with strong electromagnetic interference and strong static electricity

4.Suitable for different installation needs indoors and outdoors

5.selectAISI 304Stainless steel made sealed case

6.selectAISI 316Stainless steel made pneumatic connection components

7.All monitoring points within the interval can be accessed through independently developed fiber optic interfacesHUBImplement with superiorsIEDInterconnection, reducing the number of interfaces, savingIEDnatural resources

8.The perfect combination of mechanics and electronics enables on-site indication and control of instruments

9.at mostfourDocking point, multiple options such as overpressure alarm, dual alarm or dual locking can be implemented, making monitoring safer and more reliable


1. Shell diameter:100mm

2. Measurement range:-0.1 ~ 0.9MPa(Customizable)

3. Measurement accuracy: (Depending 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 humidity95%RH

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

7. Interface size:M20×1.5(Can)Customized)

8. Installation method: radial or axial

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

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

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

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

11. Contact type: Magnetic assisted electric contact switch

80%Silver20%Nickel,10µmgold-plating

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

13. Contact electrical parameters:30W/ 50VA, 1A.(Maximum)

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

14. Table glass: multiplex safety glass

15. Weight: 1.2kg

16. Pressure sensing component: imported Burton tube

Main electrical performance indicators and specifications for remote transmission

Working voltage:DC 24V

power waste:<>

Communication method: optical cable

Communication protocol:ModBus RTU

Transmission speed:57600bps

anti-electromagnetic interferenceIEC61000-4-24level(15kV)

IEC61000-4-33level(10V/m)

IEC61000-4-44level(4kV)

IEC61000-4-53Grade(+/-2kV

IEC61000-4-63Grade(10V

IEC61000-4-85Grade(100A/m


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

Refillable oil

Measurement mediumSF6AirN2SF6+N2Waiting for gas


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