📢 We will be closed on 1-2 December for national day holidays
Related Product
Product Detail View

PRODUCT SPECIFICATION
Description
- Door contact sensor detects when doors and windows are open or closed.
- It is a peripheral security sensor that sends alerts to Syscall receivers.
- Able to detect open state of doors only or both open and close.
- It can be used when access to restricted area is detected or when guest visit notification is required.
Specification
| Dimension | Main: W70 x L40 x H26mm Magnet: W70 x L16 x H20mm |
| Net Weight | 55g/15g |
| Frequency Range | FSK/433.42MHz |
| Power Source | Battery(CR123A) |
| Compatibility | All Syscall receivers |
Features
- External antenna improves wireless range
- LED indicator blink when the door is open or closed
- LED will blink continuously for low battery notification
- 3 types available
- A type: Detects when door is open (call)
- B type: Detects when door is open (call) and closed (clear)
- C type: Detects when door is open (clear) and closed (call)
Benefits
- Enhance Security
- Maintain the Safety
- Real-time Monitoring System
- Keep the Criminals Away
System Map
- When the door is open or closed, it sends alerts to Syscall receiver.
- Available Receivers: SR-A series, Direct pagers and Light indicator





![[SLL-400] LIGHT INDICATOR](https://syscalluae.com/wp-content/uploads/2025/06/SLL-400.png)

![[SB-700] DIRECT PAGER](https://syscalluae.com/wp-content/uploads/2025/05/SB-700.png)
