Scantronic DET-REXT-PIR30 | Wireless Outdoor Motion Detector | Dual Tech (PIR + MW), 30m Range

FAQs

Why does dual technology detection reduce false alarms compared to single-technology detectors?

The DET-REXT-PIR30’s dual technology approach requires both the passive infrared (PIR) sensor and the 24GHz microwave sensor to detect movement simultaneously before triggering an alarm. PIR sensors detect changes in infrared heat signatures, while microwave sensors detect motion through Doppler shift of reflected microwaves. Environmental factors that commonly cause false alarms in outdoor single-technology detectors—such as moving vegetation blown by wind, small animals, temperature changes, or weather conditions—typically affect only one detection technology. For example, wind-blown branches might create movement detected by microwave but generate no significant heat signature change for PIR. By requiring both technologies to confirm detection, the system dramatically reduces false alarms while maintaining high sensitivity to genuine human intrusion attempts that produce both heat signature and motion characteristics.

How do I select the appropriate detection range setting for my perimeter?

The DET-REXT-PIR30 offers programmable detection ranges of 10m, 20m or 30m to accommodate different perimeter protection scenarios. For smaller areas, confined courtyards, or locations where you want to limit detection to immediate boundaries, the 10m setting provides focused coverage while reducing potential triggers from adjacent areas beyond your property. The 20m setting suits medium-sized perimeters, typical commercial properties, or residential installations requiring balanced coverage. The maximum 30m setting is ideal for large commercial boundaries, industrial sites, or expansive properties requiring maximum detection depth. Selection should consider factors including property size, desired detection zone, potential for nuisance alarms from activity beyond your boundary, and integration with other perimeter protection measures. The programmable range capability allows installers to customize detection patterns precisely for each installation location.

What is the creep mirror feature and why is it important?

The creep mirror is a specialized optical element designed to detect activity immediately below the detector unit, addressing a common vulnerability in perimeter detection systems. Experienced intruders may attempt to avoid standard detection patterns by approaching directly beneath wall-mounted or elevated detectors where traditional PIR and microwave detection zones have limited coverage. The creep mirror redirects detection capability downward, monitoring the area immediately below the unit to detect anyone attempting to bypass the main detection zones through close approach to the mounting location. This feature ensures comprehensive perimeter coverage without blind spots that could be exploited, providing complete protection across the full detection area including approaches that would normally fall outside standard detection patterns.

How does the 500m radio range affect installation flexibility?

The 500-metre radio range in free space provides exceptional installation flexibility for perimeter detection applications where detectors must be positioned far from control panels or at property boundaries distant from buildings. This extended range enables reliable wireless communication across large commercial sites, industrial premises, residential estates, or properties with challenging layouts where perimeter areas are separated from main buildings by significant distances. The robust 868MHz radio transmission maintains signal integrity even across expansive properties, eliminating the need for expensive cable installation through grounds, car parks, or across difficult terrain. Installers can position detectors at optimal perimeter locations for detection coverage without being constrained by cable run distances or the need for intermediate repeater equipment, though real-world range depends on building materials, terrain, and potential radio frequency interference.

Can the DET-REXT-PIR30 be used to trigger video surveillance systems?

Yes, the DET-REXT-PIR30 is specifically designed to integrate with both alarm systems and video monitoring equipment, making it ideal for comprehensive perimeter security solutions. When the detector identifies movement through its dual-technology verification process, it can trigger Scantronic i-on control panels which can then activate video surveillance systems, direct specific cameras to predetermined positions, or initiate video recording. This integration enables automated response to genuine intrusion detection, ensuring security personnel receive both alarm notification and visual verification of perimeter breaches. The dual-technology false alarm reduction is particularly valuable for video surveillance integration, minimizing unnecessary recording and review of false alarm events while ensuring all genuine intrusion attempts are captured. This combination of detection and verification creates efficient security response protocols for monitored premises.

What maintenance does the DET-REXT-PIR30 require?

The DET-REXT-PIR30 is designed as a low-maintenance outdoor detector with approximately 24-month battery life based on 200 activations per day. Primary maintenance requirements include periodic battery replacement using two 3V CR123 lithium batteries, which should be performed according to battery status monitoring from the control panel or when low battery warnings occur. The detector’s IP65 weatherproof rating protects internal electronics, but external housings should be inspected during routine security system maintenance for damage, proper sealing integrity, or accumulation of debris that might affect detection windows. The UV-stabilized materials resist degradation from sunlight exposure, but harsh outdoor environments may accelerate wear. Walk testing should be performed periodically to verify detection range and confirm both PIR and microwave technologies are functioning correctly. Tamper protection should be tested to ensure security integrity is maintained. The wireless design eliminates concerns about cable deterioration common in wired outdoor detectors.