Single and dual-technology sensors explained

When it comes to protecting more challenging environments, most installers choose to utilise dual-technology sensors. These sensors possess the strength to keep a stable performance and can handle conditions such as strong sunlight and air currents, while still being capable of detecting small movements. However, there are certain locations where dual-technology sensors are not necessary and situations where single technology sensors (PIR) perform best.

DUAL-TECHNOLOGY SENSORS

Dual-technology sensors typically include a combination of PIR and micro-wave technologies. An alarm is only raised when both technologies simultaneously detect. The purpose of this approach is to ensure that each sensor compensates for the weaknesses of the other, thereby eliminating false alarms. The effectiveness of dual-technology sensors depends on the characteristics of each sensing technology.

Microwaves function differently. They emit a signal that covers an area and then detect variations between the transmitted signal and the reflected one, known as the Doppler shift. Microwave sensor technologies offer strong detection performance, capable of detecting almost any movement.

SINGLE TECHNOLOGY SENSORS

Even if it looks like having dual-technology sensors represents an upgrade in the security system, it isn’t always necessary or the best solution. In every case, it’s essential to evaluate the specific characteristic of the type of installation and of the sensor. Some of the challenges commonly faced by PIR sensors have been addressed by OPTEX developing digital sensors and unique algorithms to ensure reliable detection and best-performance.

CONCLUSION

Ultimately, there is no one-size-fits-all; the decision between single technology sensors and dual-technology sensors depends on the specific needs, budget, and environmental factors. Assess the level of accuracy required, potential false alarm sources, installation complexity, coverage area, power considerations, and weigh them against the benefits of each sensor type to make the right choice for you.