Protech SDI-77XL-DIR-LT Ladder and Tower Sensors Narrow Angle Ladder Power Sensor

Protect ladder climbs and tower access points with the Protech SDI-77XL-DIR-LT, a purpose-built intrusion accessory that delivers dependable perimeter detection and minimizes false alarms. This ladder and tower sensor combines Stereo Doppler Microwave and Passive Infrared technologies, requiring both to trigger before an alarm — giving security and surveillance teams higher confidence in every alert. An approaching-target field setting focuses detection on inbound movement only, avoiding nuisance activations from wind, birds, or site vibrations. Digital Range Control provides installers with easy adjustment of detection distance so the sensor performs optimally on different tower heights and ladder configurations. Designed for outdoor use and built in the US, the SDI-77XL-DIR-LT is ideal for critical infrastructure, telecom sites, utilities, and any application where accurate monitoring of vertical access is essential. Integrate it into your intrusion monitoring or access-control system to reduce false positives and speed incident response. Order the Protech ladder and tower sensor today for reliable perimeter security and improved operational efficiency.

• Precision dual-technology detection reduces false alarms for reliable perimeter security
• Narrow-angle design targets ladder and tower access points to protect critical infrastructure
• Field setting to detect only approaching targets, eliminating nuisance triggers from vibrations and wildlife
• Stereo Doppler microwave + Passive Infrared requirement ensures high-confidence alarms for monitoring and response teams
• Digital Range Control lets installers tailor detection distance for different heights and site conditions
• US-made build and rugged design for long-term outdoor performance in harsh weather