As an enhanced version of the FX-40 model, the FX-40D offers Patented Double Conductive Shielding of Pyro Electric Element, which lets infrared energy pass through, but blocks and grounds out the RFI and light sources via a special conductive filter that covers the element window. A conventional metal shielded pyro electric element has an open window for infrared energy to enter. This allows RFI and light to enter and does much less to protect against many types of interference.
In addition, the FX-40D features
The FX-40 Series' multi-focus optics, spherical lens design and superior optical technology provide precise detection capability and durability for unbeatable performance. OPTEX's unique sensors satisfy your everyday needs - simplified installation combined with innovations like easy wire knockouts and invaluable wiring guide convenience.
A highly accurate and reliable detection pattern maintains sensitivity throughout the entire detection area even in high temperature or low contrast environments. Multi-Focus Optics create an extremely high vertical zone density, two or three times the size of conventional PIRs. These taller zones capture the entire body mass and enable detection of even the smallest temperature contrast against the temperature of the background. In addition, the vertical detection density has been improved to take into account dead zones created by furniture or partitions.
Sealed optics prevent drafts and small insects from getting on to the pyroelectric element. This practically eliminates the chance of false alarm due to these causes since the pyro is sealed with the inside molding of the housing cover.
Spherical lens design reduces distortion caused by conventional flat lenses, which create sensitivity distortion problems when they are bent to fit a curved housing. OPTEX's spherically designed lens automatically produces sharp detection because no bending is required.
FX-40D features ECO Technology (Environmental Compensation), which increase the sensor's resistance to all kinds of environmental disturbances. Logic built into the chip allows the sensor to recognize, discriminate and adjust for temperature changes within the sensor's environment. This technology also makes the unit less susceptible to false alarms due to RFI disturbances.
A Temperature Compensation Circuit increases detection capability under high temperature conditions where the background temperature is similar to that of the human body. It maintains a high level of false alarm protection while providing accurate detection by automatically adjusting its sensitivity according to the environmental temperature.
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