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PYD Series Dual-element Pyrodetectors PIR

Product information "PYD Series Dual-element Pyrodetectors PIR"

Analog Output; Responsivity 4.2 kV/W Typ.; Max. Match 10%; Max. Noise 50 µVpp; FoV Horizontal 71°-110°; FoV Vertical 71°-110°; Operating Voltage 2.0-10 VDC

Excelitas PYD Series of dual-element pyrodetectors are well established as the performance standard in motion detection.

This series’ design features two sensing elements connected to each other in reverse polarity (opposed series connection) with a FET in-source follower circuit to provide an AC-signal with motion and common mode rejection for non-moving radiation. Users can specify various window sizes to meet desired fields-of-view.

Integrated into a TO-5 metal housing with a small optical window, the Excelitas PYD 1378 dual-element pyrodetector (replacement to the LHi 778) delivers exceptional economy and value for high-volume motion detection applications without sacrificing performance.

PYD 1388 (replacement to LHi 878) and PYD 1398 (replacement to LHi 968) dual-element pyrodetectors represent Excelitas’ standard analog pyrodetector offering. They are integrated into a robust TO-5 metal housing with an optical window. The PYD 1388 is the base model, while the PYD 1398 is equipped with additional features such as a larger window to reduce white light sensitivity and a gate resistor for better low-temperature performance.

Both sensors are available in two EMI versions. The standard version features one RC-filter at drain and source pin. For applications in heavy EMI conditions (5G and antennas close to the sensor), a version with an additional RC-filtering stage is available to further reduce interference effects of electromagnetic disturbances.

PYD 1384 (replacement to LHi 874) and PYD 1394 (replacement to LHi 944) dual-element pyrodetectors are the low-profile variants of the PYD 1388/1398 standard analog PIRs in a low-profile TO-39 metal housing with optical window. The PYD 1384 is the standard base model of the low-profile series, while the PYD 1394 is equipped with a larger window that provides a wider field-of-view.

An additional drain resistor and output capacitor further reduce interference effects of electromagnetic disturbances for EMI sensitive applications. Ideally suited for motion detection, the low-profile design permits two pyros to be space-efficiently integrated together to enable a 180° field-of-view.

Applications: Optimal for Cost-effective Designs; Long-distance Human Motion Detection (With Lens); Energy-saving Applications; Intrusion Alarms; Horizontal Mounting Applications


Please note that Excelitas products are available from us only in Denmark, Finland, Iceland, Norway, and Sweden. 

Manufacturer "Excelitas Technologies"

Excelitas’ thermal infrared sensors like thermopiles or pyroelectric IR detectors (PIR) are used for motion detection, presence monitoring, temperature measurement and gas detection. Excelitas’ broad portfolio of sensors, detectors and emitters also includes phototransistors, photodiodes, PIN photodiodes, avalanche photodiodes (APD), ambient light sensors, single photon detectors and many more.


The products can be found in a vast array of applications across automotive, consumer products, defense and aerospace, industrial, medical, safety and security and sciences sectors.


Please note that Excelitas products are available from us only in Denmark, Finland, Iceland, Norway, and Sweden. 

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PYQ Series Four-element Pyrodetectors PIR
Analog or Digital Output; Responsivity 4.5-8 kV/W Typ.; Max. Match 10%, 15%; Max. Noise 75-140 µVpp; FoV Horizontal 95°-148°; FoV Vertical 87°-124°; ADC Resolution 14, 15 bit; ADC Sensitivity 6.5 µV/Count; Operating Voltage 1.8-10 VDCExcelitas’ PYQ Series of four-element pyrodetectors provides quad PIR designs in single- and dual-channel outputs, with analog outputs or with the enhanced function and streamlined integration of Excelitas’ DigiPyro product line with digital output.Pyrodetectors having four sensing elements may be configured in various geometrical forms. The most prominent design today is referenced as “quad”, which is two pairs of elements in a square form layout. With the spacing and polarity of the elements, different variations are available. Most of the applications for such detectors are ceiling-mount sensing devices.Latest versions of PYQ Series quad pyros include the enhanced functionality as known of the dual-element, low-power DigiPyro PIRs PYD 1588 and PYD 1598 , so offering a dual-channel quad DigiPyro with sleep mode, sensitivity adjust, bandwidth selection and window time.PYQ 1398, PYQ 1348 Single-Output Quad PyrosExcelitas' PYQ 1348 and PYQ 1398 single-output quad pyrodetectors provide four sensing elements in a geometric square placement. Electrically, all PIR elements are electrically connected in series to one FET in source follower connection, forming one common analog output signal.The two versions vary from each other by different window size (rectangular window or square window size) and element spacings. Different geometrical placements are available on request. When being applied with suitable lens or mirror optics, these detectors are used in ceiling mount devices.The Excelitas PYQ 2498 dual-output quad pyrodetector provides four elements separated into two pairs of two elements in a geometric square placement. Two PIR elements per pair are electrically connected in series to one FET in source follower connection forming one individual analog output signal for each pair. The TO-5 housing includes an optical window in rectangular shape. Geometrically the two pairs have a narrow spacing. For better EMI protection, the detector includes an internal RC circuit.The PYQ 1548 low-power quad-element DigiPyro pyrodetector configures all four PIR elements combined to one digital output with exceptional energy-efficiency. The user selects and sets individual functions. A single-wire connection with separate input pin allows setting of sensitivity, bandpass selection, pulse count and wake up. This provides full functionality of a complete PIR sensing device when all following circuitry is in sleep mode. PYQ 1548 PIRs are also available with smaller elements of 0.8 mm x 0.8 mm - suitable for compact lenses and short detection distances. The PYQ 1748 quad-element DigiPyro pyrodetector provides economical quad configuration with all four elements combined to one common output. This enables ceiling-mount applications when applied with suitable lens optics. TO-5 housing is provided with rectangular window to accommodate wider field-of-view. Standard geometrical element layout offers equal distance and spacing with cross polarity.PYQ 2898 and PYQ 5848 quad-element DigiPyro pyrodetectors are distinguished by two pairs of PIR sensing elements with digitized signals for each pair. Together with the signal of an internal reference diode, the output via digital link forms a 3x14 bit stream. As to the spacing of the sensing elements, various designs are available. The TO-5 housing is provided with suitable window size to accommodate the field-of-view of the element configuration.Applications: Ceiling- and Wall-mount Sensing Applications; Long- and Mid-distance Motion Detection (With Lens); Energy Saving Applications (Light Management/Smart Home); Intrusion Alarms; Improved Pet Immunity Solutions (With Proper Lens)Please note that Excelitas products are available from us only in Denmark, Finland, Iceland, Norway, and Sweden. 
Product number: SW11545
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