Scantronic DET-2R-DT Wireless PIR Detector | Dual Tech with Microwave Sensor | Grade 2

FAQs

What is dual technology detection and why is it better for certain environments?

Dual technology detection combines two different sensing methods – passive infrared (PIR) and K-band microwave – and requires both sensors to detect movement before triggering an alarm. PIR detects changes in heat signature, while microwave detects physical movement. This dual verification dramatically reduces false alarms caused by environmental factors. In areas with temperature fluctuations (warehouses, garages), direct sunlight (conservatories), or repetitive movements (ceiling fans), standard PIR detectors may trigger falsely. The DET-2R-DT’s microwave sensor verifies that genuine movement is occurring, not just environmental changes, making it significantly more reliable in challenging conditions.

When should I choose the DET-2R-DT instead of the DET-2R-PIR?

Choose the DET-2R-DT for challenging environments including warehouses, sheds, garages, conservatories, and rooms with ceiling fans or air conditioning where temperature fluctuations, direct sunlight, or repetitive movements could cause false alarms with standard PIR detectors. The DET-2R-PIR is suitable for most standard indoor residential applications with stable temperatures and no direct sunlight. While the DET-2R-DT is heavier (190g vs 150g) and requires 3 batteries instead of 2, both offer the same 5-year battery life and identical detection range. The dual technology approach provides superior false alarm rejection in difficult environments.

How does pet tolerance work with dual technology detection?

The DET-2R-DT includes pet tolerance up to 25kg that works with both the PIR and microwave sensors. Specialized detection algorithms distinguish between human movement and smaller animals moving at floor level. The pet tolerance feature can be enabled or disabled wirelessly via the control panel’s two-way radio communication, providing flexibility without requiring physical access to the detector. This allows households with cats, small dogs, and other pets to maintain security in challenging environments like conservatories or rooms with large windows without false alarms.

What is the battery life and how many batteries are required?

The DET-2R-DT requires 3 x AA alkaline batteries and provides a typical battery life of 5 years. Despite using dual sensing technologies, the same 5-year life as the PIR-only model is achieved through SSR transmission acknowledgement functionality, which extends battery life by up to 66% compared to legacy mode operation. The detector uses standard AA alkaline batteries available from any retailer. The control panel will provide low battery warnings well in advance of depletion, allowing proactive battery replacement to maintain continuous protection.

What is the detection range of the DET-2R-DT?

The DET-2R-DT has a detection range of 12 metres in radius, creating a fan-shaped coverage pattern. Both the PIR and microwave sensors must detect movement within this range for the alarm to activate. The detector should be positioned to maximize coverage of entry points and walkways within the protected area. For optimal performance, mount the detector at the recommended height (typically 2-2.4 metres) and angle it to cover the desired detection zone while avoiding direct exposure to heat sources, windows, or air conditioning vents that could affect the PIR sensor.

Why does the DET-2R-DT have lower humidity tolerance than the DET-2R-PIR?

The DET-2R-DT is rated for humidity up to 93%, while the DET-2R-PIR tolerates up to 95%. This slight difference is due to the additional microwave circuitry in the dual technology detector. However, 93% humidity tolerance is still suitable for virtually all indoor applications including high-humidity environments like bathrooms, kitchens, and indoor pool areas. Both detectors maintain the same operating temperature range of -10°C to +55°C and Environmental Class II rating.

Can the DET-2R-DT be used in conservatories with full glass walls?

Yes, the DET-2R-DT is specifically recommended for conservatories and areas with direct sunlight exposure. Standard PIR detectors can be triggered by solar heating of surfaces or objects in the detection zone, causing false alarms. The DET-2R-DT’s microwave sensor provides verification that actual physical movement is occurring, not just heat changes from sunlight. This makes it ideal for conservatories, sun rooms, and spaces with large windows or skylights where direct sunlight creates challenging conditions for PIR-only detectors.

Is the DET-2R-DT compatible with my existing Scantronic panel?

The DET-2R-DT is compatible with all current Scantronic control panels including the 80HE, 100WE, 200WE, and 400WE models when operating in SSR mode. It also offers Legacy mode support at 868.6625MHz for backward compatibility with older Scantronic radio systems. The ability to switch between SSR and Legacy modes ensures the detector can be used across a wide range of Scantronic installations. Check your specific control panel model documentation to confirm compatibility and determine which mode to use for optimal performance.