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Dwyer Model IR3 & IR4 Infrared Thermometers

Detail Dwyer Model IR3 & IR4 Infrared Thermometers

Up To 20:1 Distance-to-Target Size Ratio, Thermocouple Input

The Model IR3 and IR4 Infrared Thermometer utilizes infrared technology for precise, non-contact temperature measurement. For standard applications, the 12:1 distance to target ratio on the IR3 provides accurate measurements within 2% of reading. When measuring smaller objects or at greater distances, the 20:1 distance to target ratio of the IR4 can provide measurements within 1% of reading. Both models have single point laser sighting for aligning the beam to the target. In addition, both models can display maximum, minimum, differential and average temperature measurements. Adjustable emissivity allows the thermometers to measure the temperature of most surfaces without any external calculations. A K-type thermocouple can plug into the handle of the thermometers in order to take surface and internal temperatures simultaneously. Audible alarms can be used for safety checks.

Model IR3 : Infrared temperature thermometer.
Model  IR4 : Infrared temperature thermometer.


  • Measurement Range : -76 to 932°F (-60 to 500°C).
  • Operating Range : Ambient: 32 to 122°F (0 to 50°C).
  • Accuracy : IR3 ±2% of reading or 4°F (2°C), IR4 ±1% of reading or 1.8°F (1°C), whichever is greater.
  • Resolution : 0.1°F/0.1°C.
  • Response Time : 1 second.
  • Distance to Target : 12:1 (IR3), 20:1 (IR4).
  • Emissivity Range : 0.95 adjustable; 0.05-1.0.
  • Additional Input: Type K.
  • Power Requirements: (2) AAA alkaline batteries, included, user replaceable.
  • Battery Life: 180 hours (without laser or LCD backlight).
  • Weight: 6.3 oz (179 g) with batteries.
  • Agency Approvals: CE.

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