ZMJ80XDR Series Density Monitors
These instruments are used to monitor SF6 gas density in sealed tanks. They are applied to indicate gas density and to provide a signal outputs when the density reaches preset threshold values. They are designed to monitor High Voltage systems
Application of ZMJ80XDR Series Density Monitors
SF6 Gas Insulated Switchgear (GIS)
SF6 Insulated Circuit Breakers
SF6 Insulated Pole-Mounted Switch
SF6 Insulated Transformers
SF6 Insulated Mutual Inductor
SF6 Insulated Busbar Systems
Features of ZMJ80XDR Series Density Monitors
Using gas compensation, higher set point accuracy
Class 1.0 display for full scale
Suitable for indoor or outdoor installation
Micro switch, can switch freely between normally open and normally closed points
Up to four pairs of nodes, multiple options such as double alarms and double locks can be realized, making monitoring more secure and reliable
High shock resistance
No need to fill oil, no oil leakage hazard
Normally closed contacts will not falsely alarm due to vibration
RS485 bus interface, facilitating system expansion, realizing telemetering and remote control. High anti-electromagnetic interference capability
Technical Data of ZMJ80XDR Series Density Monitors
| Scale range: | -0.1 to 0.9MPa (customizable) |
| Set point Accuracy: | –30~+50 ℃，±1.0%FS（±10KPa）（gas phase） |
| Indication accuracy: | +20±1℃，±1.0%FS（±10KPa,0~0.9MPa abs.） |
| +20±1℃，±1.5%FS（±15KPa,1.0MPa abs.） |
| Sensor accuracy: | calibration point: +20±1℃，±0.8%FS（±8KPa） |
| –30~+50 °C，±1.0%FS（±10KPa） |
| Degree of protection: | IP65 |
| Ambient conditions: | -40°C to 60°C |
| Leakage rate: | < 1 × 10-9 Pa·m3/s , Relative humidity ≤ 95%RH |
| Pressure connection: | M20 × 1.5, (customizable) |
| Location: | Bottom or back |
| Electrical connection: | Connect the plug when plugging, wire diameter 0.2...2.5 mm2 |
| Insulation properties: | Insulation resistance: >100 MW (500 V DC) |
| Withstand voltage: 2kV, 50/60 Hz 1 min (to case) |
| Contact type: | Micro Switch |
| Impact rating: | 50g |
| Contact ratings: | 10(1.5)A,250V AC |
| 0.1 (0.05)A,250V DC |
| Window: | Laminated safety glass |
| Weight: | 1.2kg |
| Pressure sensitive components: | bellows and Bowden tubes |
Main electrical performance indicators and specifications of the remote transmission part
| Power supply: | 24V DC |
| Power consumption: | < 2W |
| Communication mode: | RS485 |
| Protocol: | ModBus RTU |
| Baud rate: | 9600bps |
Anti-electromagnetic interference
| IEC61000-4-2: | level 4 (15kV) |
| IEC61000-4-3: | level 3 (10V / m) |
| IEC61000-4-4: | level 4 (4kV) |
| IEC61000-4-5: | level 4 (+/- 2kV) |
| IEC61000-4-6: | level 3 (10V) |
| IEC61000-4-8: | level 5 (100A / m) |
| IEC61000-4-9： | level 5（1000A/m） |
| IEC61000-4-10： | level 4（30A/m） |
Options of ZMJ80XDR Series Density Monitors
Different measuring ranges
Can detect SF6, Air, N2, SF6+N2 and other gases
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Pressure Instruments Inquiry
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