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383 Non-Contact IR Thermometer with Laser Sighting

Measure -31 to +999°F (-35 to 537°C), non-contact (IR) thermometer with laser sighting. Same great features of the 381a with a wider temperature range.

  • Repeatable measurements, 0.1° resolution readings
  • Temperature compensated for accurate readings
  • Hold function
  • Easy-to-use one button operation
  • °C and °F selectable
  • Distance to spot ratio 9:1
  • Laser sighting
  • Easy to read LCD with backlight
  • Auto off

Product Documentationpdf-icon1

Click below to view or download product documentation PDFs:

383a Manual

383a Data Sheet

£80.00 RRP exc. VAT 

Where to Buy TPI Products

Frequently Asked Questions

  1. What does “distance to spot ratio” mean?
    The laser spot needs to be showing inside the target area. An 8:1 “distance to spot ratio” means you are measuring a 1” diameter area at a distance of 8”.
  2. How far can I measure?
    Distance is unlimited. The size of the target area sets the limit on distance for accurate measurements. Example: If the area you wish to measure is 1 foot in diameter, then you will need to be within 8 feet to record an accurate temperature.
  3. What is the smallest target I can read?
    Approximately one-half inch in diameter.
  4. What is emmisivity?
    This is a ratio of an object’s infrared emission compared to a theoretical black body considered 1. Emissivity is always less than 1. Adjustable emissivity allows your non-contact thermometer to be adjusted to the surface you are checking to make readings more accurate.


 Model 383a Specifications
 Non-Contact (IR) Range  -31°F to 999°F
 -35°C to 560°C
 Accuracy  +/-2% of reading or +/-3.5°F whichever is greater
 Contact (K-Type) Range  N/A
 Non-Contact Accuracy  N/A
 Distance to Target Ratio  9.5:1
 Response Time  500mS
 Spectral Response  7 to 14um
 Emissivity  0.95 Fixed
 Laser Sighting  Yes
 Min/Max Record  No
 Display Resolution  0.1° / 1° (Automatic)
 Backlight Display  Yes
 Operating Temperature  32°F to 120°F (0°C to 50°C)
 Battery Type  9V

TPI 380 Series Demonstration Video

383a Applications

  • Vent air and return temperature measurements
  • Tubing, piping, and sheet metal temperature
  • Leaks around cooler or freezer doors

Distance to Spot Ratios (D:S) for TPI IR (Non-contact) Thermometers:

Models 375 / 376 / 377 (11.5:1):








Models 380 / 381 / 383 / 384 (9:1):


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