Ajax Motion Protect Plus (8IN) – High-Precision Dual-Tech Wireless Motion Detector

The Ajax Motion Protect Plus (8IN) is a wireless infrared motion detector equipped with an additional microwave sensor for enhanced accuracy. Designed for indoor use, it filters out interference using radio frequency scanning, making it ideal for challenging environments. This dual-technology sensor avoids false alarms even in rooms or warehouses with active air conditioners, fans, or fireplaces, ensuring reliable motion detection where standard PIR sensors may struggle.

Specifications

Specification	Details
Detection Technology	PIR sensor + K‑band microwave sensor (dual‑tech)
Detection Distance	Up to 12 m (≈ 39 ft)
Detection Angles	Horizontal: 88.5° • Vertical: 80°
Pet Immunity	Up to 20 kg / 50 cm (≈ 44 lb / 1.6 ft)
Alarm Response Time	Approx. 0.15 s
Communication Protocol	Jeweller (encrypted, two‑way)
Wireless Range	Up to 1,200 m open‑space
Battery Type & Life	CR123A battery (pre‑installed), up to 5 years
Installation Height	Recommended at 2.4 m
Operating Temp & Humidity	−10 °C to +40 °C, up to 75% RH
Dimensions & Weight	110 × 65 × 50 mm; approx. 96 g
Anti‑Sabotage Features	Tamper detection, jamming detection, encryption, authentication
Apps & Integration	Configured via Ajax apps; integrates with oc Bridge Plus / uart Bridge and CMS

Key Features

 • Dual-Technology Detection: Combines PIR and microwave sensing to validate motion and reduce false positives, ideal for handling thermal interference scenarios. 

 • Smart Detect Algorithm: Processes thermal patterns to distinguish human movement from environmental noise using advanced Fresnel lens design and software filtering.

 • Pet Immunity: Customizable sensitivity levels enable the device to ignore pets up to 20 kg and 50 cm tall.

 • Fast Alerts & Secure Communication: Sends alarm signals in about 0.15 seconds via encrypted Jeweller protocol with range up to 1.2 km.

 • Long Battery Life: Pre-installed battery offers up to 5 years of operation.

 • Ease of Setup: Mounts easily on Smart Bracket and integrates seamlessly with Ajax hubs and third-party systems.

 • Robust Anti-Sabotage Protection: Features tamper detection, jamming alerts, frequency hopping, and authentication to secure the installation.

Applications

 • Homes & Pet-Friendly Spaces: Ideal for residences with pets and environments sensitive to false triggers like living rooms with fans, curtains, or fireplaces.

 • Offices & Commercial Installations: Effective in environments with HVAC systems, varying lighting conditions, and reflective surfaces.

 • Structured Security Networks: Integrates with centralized monitoring via Ajax apps and CMS for large-scale deployments requiring detailed event logs and automation. 

Many users note that the microwave component makes a significant difference in environments prone to thermal interference. > “If you have warm air currents… yes.” 

Summary

The Ajax Motion Protect Plus (8IN) is a premium indoor motion detector that pairs infrared sensing with microwave verification to significantly reduce false alarms. Beyond its 12-meter detection range and wide field of view, it’s pet-friendly, fast in alert response, and offers secure, long-range connectivity. With intelligent algorithms, robust anti-tampering safeguards, and easy integration into Ajax or third-party monitoring systems, it’s a smart, reliable choice for both home and professional security setups. Let me know if you'd like mounting guidelines, sensitivity tips, or integration help!