The Orbis LX Base has two slots for fixing screws at a spacing of 51mm to 69mm. Detectors fit into the base one way only and require clockwise rotation without force to be plugged in.
Approvals: AS 7240

| Operating Temperature | -40°C to +70°C |
| Humidity | 0 to 98% |
| IP Rating | IP23D (indoor use) |
| Size | 100mm Dia x 15mm H |
| Weight | 60 grams |
| 201-0545 | Orbis LX Base |