PASPORT Infrared Light Sensor - PS-2148



The Infrared Sensor uses a Nitrogen-filled Thermopile with a Thallium Bromide-Iodide (KRS-5) window to sense wavelengths from 580 to 40,000 nm. This allows students to measure a variety of phenomena including the infrared radiation emitted from their own hand.

Typical Applications

  • Measure blackbody radiance
  • Perform Leslie's Cube experiments
  • Measure Solar radiance
  • Evaluate heat flow into or out of the sensor
  • Simulate a non-contact temperature sensor

Special Features

  • Measure intensity in Watts/Meter2 (W/m2).
  • Built in thermistor to measure temperature of the "cold" side of the thermopile in °C, °F or K.


  • Shutter with thumbscrew and washer
  • Sensor Handles (4 Pack) (CI-9874)
  • Specifications

    Active Area Size
    • 1.5 x 1.5 mm
    Element Area
    • 2.25 mm2
    Number of Thermocouple Junctions
    • 120
    Field of View
    • 48 °C or 92 °C (see manual page 4 for detail)
    Intensity Range
    • -500 to 4,500 W/m2 max.
    Spectral Response
    • flat from 0.7 to 30 μm
    Window Material
    • KRS-5
    Encapsulating Gas
    • nitrogen
    • 31 ±7 V/W

    Buying Guide

    PASPORT Light Sensor
    Expand Your Set
    PASPORT Light Sensor   PS-2106A

    Interface Required

    To use this product you need a PASCO interface. 

    New to probeware or have questions about  sensors or interfaces? Contact Teacher and Technical Support.  We're here to help!

    Software Required

    SPARKvue software or PASCO Capstone software may be used. PASCO Capstone is available for Mac and Windows. SPARKvue is available for Mac, Windows, iOS, Android and Chromebooks.

    Learn more about Bluetooth Compatibility.