SAC24 System - One-Piece Device

It is a system composed of a single device to be worn around the ankle of the sentenced individual. Easy to use, with highly secure transmission and storage of information, robust and in compact size. It meets both national and international standards and its costs is consistent with the Brazilian needs.

Dispositivo de peça única
Fully developed by Spacecom, it is the only system in this area with 100% national technology and features geared to the Brazilian reality.

How it Works

While being monitored, the convicted must wear the device on his/her ankle. The location (GPS) and alarms information are transmitted to Spacecom´s servers via cellular network (GPRS) and available via web interface. With this, the institution has access to monitoring data from any terminal connected to the Internet in real time.

Dispositivo de peça única


The device is equipped with various anti-fraud mechanisms that ensure system integrity. In addition to the information from various positions and status, the system monitors the possible fraud:

+ Fastening strip breaking of the anklet fixation of ankle;

+ Violation of anklet enclosure;

+ Detection of movement without GPS signal.

Coverage Area

Spacecom monitoring devices are the only ones that fit 2 simcards. This means that the coverage area is at least equal to the sum of the coverage area of two mobile operators.

Besides a much broader coverage area, redundancy in communication greatly enhances the system's ability to continue operating normally if a telecom service provider has a problem in the transmission or if the monitored individual is in a shady area.

The equipments do not depend on the operator. For the system to transmit data using a new carrier, simply make the change in one of the simcards, just as with an ordinary phone (the exchange can not be made directly by the sentenced individual because the devices are tightly sealed and can not be opened by them).


1. Physical characteristics:
+ Material: injected ABS of high impact;
+ Fixing strap with embedded fiber optics, adjustable size and hypoallergenic;
+ Waterproof (IP-68);
+ Weight: less than 200 grams;
+ Temperature: -10 °C to 55 °C.

2. Location system:
+ Super sensitivity GPS (Super sensing);
+ Acquisition time of configurable coordinations;
+ 1-5 meters of accurancy;
+ Assisted GPS (AGPS).

3. GPRS communication:
+ Use of 2 telephony operators for data transmission (redundancy);
+ Encrypted communication using proprietary protocol;
+ Adjustable Transmission time.

4. Memory:
+ 50,000 points of continuous data storage.

5. Battery:
+ Li-Ion;
+ Minimum durability battery recharges estimated at 1,000 (depending on usage conditions).

6. Transmitter:
+ Transmitting frequency of 915 MHz;
+ Encrypted communication using proprietary and bidirectional protocol.

7. LED display:
+ Indication of GPRS miscommunication;
+ Absence of GPS signal;
+ Indication of supervisor´s incoming call;
+ Low battery level.

8. Sound alerts:
+ Movement without GPS;
+ Low battery level;
+ Breach of inclusion and exclusion areas rules;
+ Indication of supervisor´s incoming call.

A Spacecom se reserva ao direto de atualizar as informações acima para refletir a evolução de seus produtos.