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
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
Switching typeOutput active/passive, programmable
Ambient conditions
Ambient temperature-20 ... 60 °C (-4 ... 140 °F)
Mechanical specifications
Degree of protectionIP52
Connectionscrew terminals, removable
Housingblack ABS
Optical faceplastic lens

Documents: PIR20/31 sw

Instruction leafletsLanguageFile TypeFile Size
Instruction leaflet / Beipackzettel ALLPDF1074 KB
Product information
Product information - Invisible Protection - Sensors for automated accesses to protect and assist people and vehiclesENGPDF18622 KB
Opuscolo - Sensori per porte, cancelli e ascensoriITAPDF1891 KB

Approvals+Certificates: PIR20/31 sw

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-2323APDF128 KB

Associated Products: PIR20/31 sw

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

Function: 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.