ZMJ80XDR Density Monitor
ZMJ80XDR Density Monitors are used to monitor SF6 gas density in sealed tanks. They are applied to indicate the gas density and to provide signal outputs when the density reaches the set values. Furthermore, it can transmit the real-time SF6 gas density data remotely, to achieve online remote monitoring function. They are designed to monitor High Voltage systems. They can provide multiple solutions to support new substations and the renovation and upgrading of existing substations.
Application of ZMJ80XDR Density Monitor
SF6 Gas Insulated Swithchgear (GIS)
SF6 Insulated Circuit Breaker
SF6 Insulated Pole-Mounted Switch
SF6 Insulated Transformer
SF6 Insulation Current Transformers or Voltage Transformers
SF6 Insulated Bus System
Features of ZMJ80XDR Density Monitor
Higher accuracy from reference chamber temperature compensation technology.
Suitable for indoor or outdoor installation
Micro-switch that can switch freely between normally open and normally closed points
Up to 3 set of contacts, multiple options such as double alarm and double lock, safer and more reliable monitoring
High shock resistance. No need to fill oil, no potential oil leakage
Normally closed contact will not false alarm due to vibration
RS485 bus interface, easy to expand current system for telemetry and remote control functions.
Strong EMC capability
±1%FS display in full range, higher remote transmission module accuracy, higher indication and remote data consistency accuracy
More accurate gauge indication values and contact switching values throughout the temperature range
Technical Data of ZMJ80XDR Density Monitor
| Scale range: | -0.1 ~ 0.9MPa |
| Accuracy of set pressure point: | ±1.0%FS（+20±1℃） ±1.6%FS（-30℃～+60℃）（gas） |
| Accuracy of indication: | ±1.0%FS（+20±1℃） ±1.8%FS（-20℃～+60℃） ±2.3%FS（-30℃～-20℃） |
| Pressure： | ±0.5%FS |
| Temperature： | ±1℃ |
| Pressure at 20℃： | ±1.0%FS |
| Degree of protection: | IP65 |
| Ambient condition: | -30℃ ~ +60℃, relative humidity： ≤95%RH |
| Leakage rate: | ≤1 x 10-9Pa·m3/s (Helium leak detection) |
| Process connection: | M20 x 1.5 (customizable) |
| Installation method: | Radial or axial |
| Contact connection: | pluggable connector, wire diameter 0.2 ~ 2.5 mm2 |
| Remote connection: | pluggable connector, wire diameter 0.2 ~ 1.5 mm2 |
| Insulation resistance: | >100MΩ (DC500V) |
| Withstand voltage: | 2kV, 50/60Hz, 1min |
| Contact type: | Microswitch |
| Impact rating: | 50g |
| Contact electrical parameters: | 10(1.5)A, 250V AC 0.1(0.05)A, 250V DC |
| Window glass: | Laminated safety glass |
| Weight: | ≈1.4kg |
| Pressure sensitive components: | Bellow and Bourdon Tube |
Technical Parameters for Remote Module
Operating voltage: 10~30VDC
Power consumption :<0.5W
Communication mode :RS485
Communication protocol: Modbus RTU
Baud rate: 9600bps
EMC tests:
IEC61000-4-2: Level 4
IEC61000-4-3: Level 3
IEC61000-4-4: Level 4
IEC61000-4-5: Level 4
IEC61000-4-6: Level 3
IEC61000-4-8: Level 5
IEC61000-4-9: Level 5
IEC61000-4-10: Level 5
Options of ZMJ80XDR Density Monitor
Different measuring range
Measuring Medium: SF6, Air, N2, SF6+N2 and other gases
Operating temperature: Optional -40℃ ~ +60℃
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