Device Type: Triple-Tech Wired PIR Motion Detector with Pet Immunity (Indoor)
Model / SKU: LH-928BC (also listed as DH-LH928BC)
Brand: Dahua
Detection Technology: Triple-Tech — Passive Infrared (PIR) + Microwave (X-Band Patch Antenna) combined in a single housing for high detection stability and false alarm immunity
Detection Range / Angle: 12 m / 90°
Microwave Frequency: 10.525 GHz (X-Band Patch Antenna)
Logic Modes: AND/OR Function — AND mode triggers alarm only when both Microwave and PIR sensors detect simultaneously (high false alarm immunity); OR mode triggers alarm when either Microwave or PIR detects (higher detection sensitivity)
Pet Immunity: 20 kg (up to 20 kg for the Turkey specification) / 25–35 kg (per regional datasheets)
White Light Immunity: 20,000 Lux — Maintains stable performance even under strong direct light sources
Installation:- Mounting Type: Wall Mount
- Recommended Installation Height: 2.2 m
Electrical:- Working Voltage: DC 9–16V
- Operation Current: <30 mA
Output:- Relay Output: N.C./N.O. Optional (Selectable Normally Closed / Normally Open)
- Tamper Switch: N.C. (Normally Closed) — External tamper protection
Physical:- Dimensions (L×W×H): 130 mm × 63 mm × 51 mm (Turkey official) / 120 mm × 60 mm × 40.6 mm (Russia regional)
- Material: ABS Plastic
Environmental:- Operating Temperature: -10°C to +50°C
Key Features:- Triple-Tech Detection: Combines PIR (passive infrared) and Microwave (X-Band patch antenna) technologies for superior detection accuracy and reduced false alarms
- AND/OR Logic Modes: Selectable detection logic for flexible installation in different environments (AND for high immunity, OR for high sensitivity)
- SMT Technology: Surface-Mount Technology ensures high EMI/RFI immunity and reliable performance in electrically noisy environments
- Temperature Auto-Compensation: Automatically adjusts detection sensitivity based on ambient temperature to avoid false alarms from heat sources
- Microwave Detection Range Adjustable: Allows fine-tuning of the microwave detection range for the specific installation environment
- Pulse Count Optional: Selectable pulse count for adapting to different installation conditions and reducing false triggers
- Innovative Railway Installation Method: Easy and quick installation design
- External Tamper Protection: N.C. tamper switch for security against housing removal
- White Light Immunity: 20,000 Lux immunity prevents false alarms from direct sunlight or strong lighting
Compatibility: Compatible with Dahua ARC Series Alarm Panels (ARC3000H Series) and other standard wired alarm control panels with N.C./N.O. relay input
Key Specs: Dahua LH-928BC Triple-Tech PIR Detector, PIR + Microwave (X-Band 10.525 GHz), 12m/90° Detection Range, 20kg Pet Immunity, AND/OR Logic Modes, 20,000 Lux White Light Immunity, SMT Technology, Temperature Auto-Compensation, Adjustable Microwave Range, Pulse Count Optional, N.C./N.O. Relay Output, External Tamper Switch, Wall Mount (2.2m Height), DC 9–16V, <30mA, -10°C to +50°C, ABS Plastic
Usage: Residential Intrusion Detection, Commercial & Office Security, Perimeter Protection, Indoor Motion Detection with Pet Immunity, and Integration with Dahua ARC Series and Standard Wired Alarm Systems
