The CTX4H is a miniature wireless magnet detector designed for use in alarm and monitoring systems. Powered by a 9V alkaline battery, it offers up to 200 meters operating range in open field and up to three years of autonomy without battery replacement. The detector supports both one-way and two-way operating modes, selectable by the user.
When used in two-way mode with dedicated Elmes Electronic receivers such as U4HR, CH8HR, or CH20HR, the detector enables real-time bistable (on-off) relay output, reflecting the open or closed state of the monitored door or window. This feature ensures comprehensive monitoring, preventing any doors or windows from being left open when the system is armed. When paired with the Elmes Electronic CB32 wireless control panel, the detector not only signals the open or closed state but also sends repeated presence identification transmissions for enhanced security.
The CTX4H uses KEELOQ® dynamic code encryption for the highest level of signal security. Additional features include a low battery warning, anti-sabotage TAMPER switch, and user-selectable LED indication. The device is available in white (CTX4H) or brown (CTX4HB) housing options.
| Model | CTX4H |
| Power Supply | 9V alkaline battery (up to 3 years operating life) |
| Operating Frequency Band | 433.92 MHz |
| Operating Range | Up to 200 meters (open field) |
| Operating Modes | User-selectable one-way or two-way |
| Detection | Open/close detection signaled by corresponding receiver relay output |
| Encryption | KEELOQ® dynamic code |
| Low Battery Warning | Yes |
| TAMPER Switch | Yes |
| LED Indication | User-selectable on/off |
| Housing Color | White (CTX4H) or Brown (CTX4HB) |
| Dimensions (L/W/H) | 104 x 30 x 24 mm |
CTX4H, CTX3H - manual (PDF)
Declaration of Conformity (PDF)
CTX4H - catalogue card (PDF)
CTX4HB - catalogue card (PDF)