Presence Detectors Are Important Electrical Components That Are Used In Various Buildings. These Come Mainly In Two Forms, I.E. Microwave Sensors, And PIR Sensors. Both These Two Types Of Detectors Have The Basic Function: To Detect If There Is A Presence Of Any Individual In The Room Or Not And If There Is Not, Then Switch Of The Electric Lights Of That Room.

With Electricity Prices Constantly On The Rise, It Has Become Necessary For People To Come Up With Ways In Which Power Consumption Can Be Controlled. Presence Detectors Are Designed In A Way That They Reduce The Duration Of Time That The Lights In A Room Or A Building Are Kept On. They Also Detect And Measure The Presence Of Sufficient Natural Light And Help In Deciding Whether The Electric Lights Need To Be Kept On Or Not. The System Is Nowadays Widely Used In Various Commercial And Domestic Building For Reducing The Monthly Power Consumption.

Presence Detectors Monitor A Detection Zone To Check For Occupancy. In Case There Is A Person Who Is Present In The Room Or The Zone, The Detector Is Going To Automatically Turn The Lights On. Once The Area Is Left Vacant By The Occupants, The Lighting Is Going To Be Switched Off After The Passage Of A Preset Time. Most Microwave Motion Sensors And PIR Sensors Come With A Built-In Light Level (Lux) Sensor That Helps To Keep The Lights Off In Case There Is The Presence Of Enough Natural Light. Using A Presence Detector To Control Lighting Can Help Us To Save Up To 60% Electricity, Depending On Availability Of Natural Light And Occupancy Behavior. Many Models Of Microwave Sensors And PIR Sensors Also Come With The Additional Features Of Heating And Ventilation Control.

Choosing To Use Absence And Presence Detection Units For Both Large And Small Spaces Is A Highly Effective And User-Friendly Way To Save Energy And Associated Power Costs. Once Installed, The Detectors Are Going To Detect The Presence Of A Person As He Or She Enters The Room And Then Switch On The Lights Automatically. These Same Sensors Switch Off The Lights Automatically If No Movement Gets Detected In The Room.

There Are Certain Specific Differences Between The Microwave Sensors And The PIR Sensors:

  • Generally, microwave sensors have much better sensibility compared to the PIR sensors.
  • Microwave sensors can also perform well if there is any metalloid barrier, which the PIR sensors cannot.
  • Moreover, the sensibility of PIR sensors is also compromised if the ambient temperature is more than 35? Celsius.