Serviceline Industrial Sensors
Serviceline Explosion Protection

Passive infrared motion sensor PIR20/31 sw

PIR20/31 sw
  • Door activation sensor
  • One of the smallest sensors for person detection
  • Reliable detection through change in the thermal image from +/- 0.5 °C
  • Accurate and seamless field adjustment through aperture and zoom function
  • Function only in case of movement

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH or Pepperl+Fuchs AG, also apply to Pepperl+Fuchs SE.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of  PIR20/31 sw

Product Description
Presence detector using infrared heat radiation for detecting people, detection range 1.8 m x 2.6 m, max. installation height 5 m, black housing, relay contact output, screw terminals
General specifications
Effective detection rangemax. 12 m (frontal)
Detection fieldmax. 1800 mm x 2600 mm for a mounting height of 2500 mm
Functional safety related parameters
MTTFdRelay load 12 V/10 mA: 500 a*
Relay load 24 V/10 mA: 350 a*
Relay load 6 V/100 mA: 100 a*
Relay load 30 V/1 A: 0.1 a*

*For 200,000 switching cycles/year in each case
Indicators/operating means
Operation indicatorLED green
Function indicatorLED red: illuminates upon detection
Control elementsZoom screw for adjusting the detection field , sensitivity adjustment , changeover switch, active/passive
Electrical specifications
Operating voltage12 ... 24 V AC / 12 ... 30 V DC
No-load supply currentapprox. 15 mA
Power consumptionapprox. 350 mW at 24 V
Switching typeOutput active/passive, programmable
Signal outputRelay, 1 alternator
Switching voltage48 V AC/DC
Switching current1 A
Switching powermax. 30 W / 60 VA
De-energized delay0.5 s (preset)
Compliance with standards and directives
Standard conformity
Standards89/336 EWG
Approvals and certificates
CE conformityyes
Ambient conditions
Ambient temperature-20 ... 60 °C (-4 ... 140 °F)
Mechanical specifications
Mounting heightrecommended: max. 3.5 m
Degree of protectionIP52
Connectionscrew terminals, removable
Housingblack ABS
Optical faceplastic lens
Massapprox. 40 g
Height23 mm
Width56 mm
Depth45 mm


ECLASS 13.027270913
ECLASS 12.027270913
ECLASS 11.027270913
ECLASS 10.0.127270913
ECLASS 9.027270913
ECLASS 8.027270913
ECLASS 5.127270903
ETIM 9.0EC002550
ETIM 8.0EC002550
ETIM 7.0EC002550
ETIM 6.0EC002550
ETIM 5.0EC001821
UNSPSC 12.139121528

Details: PIR20/31 sw


The PIR20 passive infrared scanner enables problem-free detection of people. It detects movement as soon as the temperature differential between an object and its environment is greater than ± 0.5°C. The detection range can be accurately set by means of zoom adjustment and lens apertures. The PIR20 detects people approaching as a door.

Informative Literature: PIR20/31 sw

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Product Documentation: PIR20/31 sw

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Brief InstructionsLanguageFile TypeFile Size
Instruction leaflet / BeipackzettelALLPDF1074 KB

Design / Simulation: PIR20/31 sw

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CADLanguageFile TypeFile Size
CAD Portal / CAD PortalALLLINK---

Approvals: PIR20/31 sw

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Declaration of ConformityCertificate No.LanguageFile TypeFile Size
EU Declaration of Conformity (P+F) / EU-Konformitäterklärung (P+F)DOC-2323AALLPDF128 KB

Associated Products: PIR20/31 sw

Protection from adverse effects of weather such as rain, snow, etc., Material: black ABSfa
Flush-mounted frame for sensors in the PIR20fa