Optris LS Lasersight infrared thermometer in hand

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Optris LS Lasersight infrared thermometer front view

Optris LS LT Portable Infrared Thermometer

The Optris LS infrared thermometer supports the professional non-contact temperature measurement of objects as small as 1 mm in a temperature range between -35°C and +900°C. This thermometer can be used in many applications such as preventive maintenance, quality management, research and development and electronic design.

The precision of the cross hair laser sighting indicates the actual spot size at any distance with absolute accuracy. The thermometer has an innovative feature in that the optical resolution is selectable between a standard focus and a close focus mode. In both cases the laser sighting facility adjusts to suit. The high quality optical performance is the distinguishing feature of the LaserSight.

This hand held infrared pyrometer comes with a USB port making it very simple to connect to a PC and utilise the Optris Connect Report Software  that gives you graphical data in real time.


The new performance standard of infrared thermometers with spot sizes as small as 1 mm
Crosshair laser sighting marks the actual spot size at any distance
Temperature range from -35° to +900°C
Optical resolution 75:1
Thermocouple input
USB interface and graphic software with oscilloscope function
Thermocouple input

General Specifications

Ambient temperature: 0°C – 50°C
Storage temperature: -30°C – 65°C
Relative humidity: 10 – 95%, non condensing
Vibration: IEC 68-2-6: 3 G, 11-200 Hz, any axis
Shock: IEC 68-2-27: 50 G, 11 ms, any axis
Weight: 420g

Measurement Specifications

Temperature range: -35° to +900°C (-30°F to 1650°F)
Spectral range: 8-14μm
System accuracy: ±0.75°C or ±0.75% of reading (1) (at ambient temperature 23 ±5°C and 20-900°C range)
Repeatability: ±0.5°C or ±0.5% of reading
Temperature resolution: 0.1°C
Response time (90%) (3): 150ms (95 %)
Optical resolution: 75:1 16 mm @ 1200 mm switchable to focus: 1 mm @ 62 mm
Minimum spot size: 1mm
Emissivity/Gain : 0.100 – 1.100 (adjustable)
Measurement Options: MAX/MIN/HOLD/DIF/ AVG/°C/°F
Software: OptrisConnect, 20 readings per second
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 reading

1) whichever is greater

Display Specifications

Display: LCD 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
Alarm functions: audible and visible HIGH/LOW alarm
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)

Data/Other Specifications

Interface, data output: USB
Data memory: 100 measurement protocols with time stamps, customisable 4 digit location and material names
Software: OptrisConnect oscilloscope software with 20 readings per second
Power: Battery 2 x AA 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 software t/c type K insertion probe carrying case, padded pouch, wrist strap, batteries

Optical Resolution

Optris LS lasersight sf optical specification Optris LS CF optical specification

OptrisConnect Software

Optris LS connect software