The standard Ø100 mm density relay for SF6-insulated equipment — temperature-compensated on-site indication with alarm and lockout contacts.
Standard · Ø100 mm
The MJ100 continuously indicates SF6 gas density referenced to 20 °C and trips up to three contact pairs at preset set-points to protect GIS, circuit breakers and switchgear as gas is lost.
Technical Specifications
| Shell diameter | 100 mm |
|---|---|
| Measurement range | −0.1 ~ 0.9 MPa (customizable) |
| Accuracy @ 20 °C | Grade 1.0 or 1.5 |
| Accuracy @ −40 ~ +60 °C | Level 2.5 |
| Working temperature | −40 ~ +60 °C; relative humidity ≤ 95 % RH |
| Contact output | Up to 3 pairs (alarm + lockout), 30 W / 50 VA, 1 A max; 220 VDC / 380 V 50/60 Hz |
| Contact type | Magnetic-assisted electric contact; 80 % silver, 20 % nickel, 10 µm gold plating |
| Insulation | > 100 MΩ (DC 500 V); withstand 2 kV 50/60 Hz 1 min |
| Process connection | M20 × 1.5 (customizable) |
| Leakage rate | ≤ 1×10⁻⁸ Pa·m³/s (helium leak detection) |
| Protection level | IP65 |
| Pressure sensing element | Imported Bourdon tube |
| Weight | approx. 1.0 kg |
| Optional | Oil-filled; MJ100L ultra-low temperature (−60 °C), nitrogen-filled, 3 kV withstand |
All parameters are typical values and can be customized to your specification. Contact us for a model-specific datasheet.
Customization & ordering
Measurement range, alarm and lockout set-points, process connection, output and labeling are configured to your equipment. OEM and ODM welcome.
Rated density plus alarm (P1) and lockout (P2) points set for your SF6 equipment.
M20×1.5 standard, or specify thread, self-sealing valve and adapter.
Oil-filled damping; MJ100L ultra-low-temperature version to −60 °C.
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Send us your quantity, rated density, set-points and connection details — we reply within 24 hours.