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optris LS LT


Product Program

  • Overview
  • Technical details
  • Applications
  • Datasheets & manuals
  • Software

Portable laser thermometer optris LS LT

The portable laser thermometer optris LS LT is an infrared handheld thermometer equipped with laser sighting, featuring a precise and reliable temperature measurement as well as an especially broad range of functions and equipment.

The portable IR thermometer optris LS LT allows not only selection of close focus and standard focus but is also equipped with innovative sighting systems (double and cross laser) for exact spot size marking at any distance. The innovative flip display automatically adjusts to each viewing position.

Important specifications

  • Temperature range:
    -35°C to 900°C
  • Spectral range: 8 to 14 µm
  • Response time: 150 ms

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Technical Details of the optris LS LT


  • Temperature range: -35° to +900°C (-30°F to 1650°F)
  • Spectral range: 8 to 14 µm
  • Accuracy:  ±0.75°C or ±0.75% of reading1) (at ambient temperatures 23 ±5°C at 20 - 900°C range)

  • Temperature coefficient: 0.05K/K or ±0.05%/K1) (below 20°C and above 30°C ambient temperature)
  • Temperature resolution: 0.1°C
  • Repeatability: ±0.5°C or ±0.5% of reading1)
  • Response time: 150 ms (95% signal)
  • Optics:
    16 mm @ 1200 mm
    switchable to focus: 1 mm @ 62 mm

  • Minimum spot size: 1 mm
  • Laser Class II: 

    standard focus: patented crosshair laser (crosshair size = IR spot size@any distance)
    close focus: two point laser (laser dot size = IR spot size@focus distance)

  • Emissivity / Gain: 0.100 … 1.100; adjustable
  • Configurations: MAX / MIN / HOLD / DIF / AVG /°C / °F
  • Alarm functions: audible and visible HIGH/LOW alarm
  • Display: LC flip display (horizontal and vertical viewing directions controlled by position sensor)
  • Display LCD backlight:  green and alarm colors (red, blue)
  • Bar graph display: auto scaling
  • Ambient temperature: 0°C - 50°C
  • Storage temperature: -30°C - 65°C
  • Relative humidity: 10 - 95% (non condensing)
  • Weight: 420 g
  • EMI: 89 / 336 / EWG
  • Vibration / Shock: 

    IEC 68-2-6: 3 G, 11-200 Hz, any axis
    IEC 68-2-27: 50 G, 11 ms duration, any axis

  • Temperature range t/c probe input: -35°C to 900°C (-30°F to 1650°F)
  • Accuracy t/c probe input: ±0.75°C or ±1% of reading1)
  • Interface, data output: USB
  • Data memory: 100 measurement protocols with time stamps, customizable 4 digit location and material names

  • Software: optris Connect oscilloscope software with 20 readings per second
  • Power: Battery 2xAA Alkaline or via USB
  • Battery life time: 
    5 h with laser on and 50% backlight use
    10 h with laser on and w/o backlight
    25 h w/o laser and backlight

  • Tripod mount: 1/4-20 UNC (optional)
  • Standard accessories: USB cable and softwar, t/c type K insertion probe, carrying case, padded pouch, wrist strap, batteries



Part number: temperature range / spectral range / optics

  • OPTLS: -35-900 °C / 8-14 μm / 16 mm@ 1200 mm (75:1)

1) whichever is greater

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Areas of application for the thermometer optris LS LT

The handheld optris LS LT is perfectly suited for any portable measurement task of non-metallic surfaces. Typical areas of employment for the convenient device are e.g. in preventive maintenance. Since each electricity-driven appliance warms up during an error, defects can be detected reliably and fast.

Of course, the portable laser thermometer is capable of performing every other punctual control process, e.g. in quality assurance, research and development as well as electronic design, in which critical components of machines can be checked for defects. Additionally, detection of thermal bridges on house fronts and in interior rooms poses no problems with the precise handheld thermometer.

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Temperature analysis software optris Connect included

The temperature software optris Connect gives you the opportunity to analyse temperatures in real time as. Furthermore you are able to document and store your measurements.

To use our cost-free analysis software, just connet your handheld infrared thermometer through USB to your computer and access your data logger as well as real time measurements.

Product configurator