PIR & Motion Sensor
PIR & Motion Sensor
Introduction Ceiling-mounted PIR sensors are common in offices and commercial spaces. However, they often have a dead zone directly below the sensor – you can stand right under it and not be detected. Why the Dead Zone Exists The Fresnel…
Overview A 200,000 square foot manufacturing plant in Ohio was spending $180,000 annually on lighting energy. The plant operated two shifts (6 AM to 10 PM) but many areas were only occupied intermittently. Forklift traffic was heavy in some zones…
Overview A regional retail chain with 25 stores specializing in home goods was struggling with staffing inefficiency. Store managers reported that busy periods were often understaffed, while slow periods had too many employees. The chain lacked accurate data on customer…
Introduction Power surges, lightning strikes, or accidental application of high voltage can damage PIR sensors. This guide helps you assess the damage and possibly recover the sensor. Symptoms of Surge Damage Sensor completely dead (no output, no LED if present)…
Overview A suburban school district with 25 elementary schools, 500 classrooms, and 10,000 students was facing budget cuts and rising energy costs. The district’s energy bill was $2.5 million annually, with schools consuming 60% of that during unoccupied hours (evenings,…
Overview A mid-sized hotel chain with 1,500 guest rooms across 10 properties was spending $2 million annually on energy costs. Guest rooms accounted for 60% of this total, with HVAC systems running 24/7 regardless of occupancy. The chain’s energy audit…
Introduction High-power radio transmitters like ham radio rigs (100W+) or CB radios can cause PIR sensors to false-trigger. The strong RF field can be rectified by the sensor’s electronics, creating false signals. How RF Interference Happens The high-gain amplifiers in…
Overview A 50,000 square foot office building in Chicago, Illinois, was struggling with high energy costs from lighting and HVAC systems that operated on fixed schedules. The building was occupied from 8 AM to 6 PM weekdays, but many areas…
Introduction Construction sites present extreme challenges for PIR sensors: dust, vibration, temperature swings, and no power. This guide covers the best options for equipment security and site monitoring. Key Requirements for Construction Sensors 1. Ruggedness IP65 or higher rating for…
Introduction High humidity environments like bathrooms, greenhouses, and tropical locations can cause PIR sensors to malfunction. Moisture in the air and on the lens interferes with infrared transmission. How Humidity Affects PIR Sensors Water Vapor Absorption Water vapor absorbs infrared…