Extech Infrared Thermometers Selection Guide

Model Range Basic Accuracy
(whichever is greater)
Max. Resolution Emissivity Field of View
(Distance to Target)

IR201
-58 to 518°F
-50 to 270°C
±2.5% of reading
or ±3°F/±2°C
1°F/°C 0.95 Fixed 6:1

42500
-4 to 500°F
-20 to 260°C
±3% of reading
or ±6°F/±3°C
1°F/°C 0.95 Fixed 6:1

42529
0 to 600°F
-20 to 320°C
±2% of reading
or ±4°F/±2°C
1°F/°C 0.95 Fixed 6:1

42509
-4 to 950°F
-20 to 510°C
±1% of reading
or ±2°F/±1°C
0.1°F/°C 0.10 to 1.00
Adjustable
6:1

42510A
-58 to 1000°F
-50 to 538°C
±1% of reading
or ±2°F/C
0.1°F/°C, 1°F/°C 0.1 to 1.00
Adjustable
12:1

IR-200
32 to 140°F
(0 to 60°C)
±0.5°F/0.3°C 0.1°C/°F - 1.9 to 5.9"
(5 to 15cm)

42512
58 to 1832°F
(-50 to 1000°C)
±(1% of reading +
2°F/1°C)
0.1°F/°C 0.10 to 1.00
Adjustable
30:1

42515
IR: -58 to 472°F
(-50 to 800°C)
Type K: -58 to 2498°F
(-50 to 1370°C)
IR: (±2% Reading or 4°F / 2°C) <932°F/500°C±(2.5%rdg +5°) > 932ºF/500°C
Type K: (±1.5% Reading +5°F or 3°C)
0.1°F/°C Adjustable
0.10 to 1.00
13:1

42530
-58 to 1000°F
-50 to 538°C
±2% of reading
or ±4°F/±2°C
0.1°F/°C,
1°F/°C
0.95 Fixed 8:1

EZ20
-58 to 1100°F
-50 to 600°C
±2% of reading or
±4°F/2°C
0.1° up to 200° 0.95 Fixed 8:1

RH101
IR: -58 to 932°F (-50 to 500°C), Air Temp: -4 to 140°F (-20 to 60°C) ±3.5% (RH), ±2% or ±4°F/2°C (IR), ±3°F/°C (Air Temp) 0.1% 0.1° 0.95 Fixed 8:1

42540
-58 to 1400°F -50 to 760°C ±2%+2°< 932°F (500°C) ±2.5%+5° > 932°F (500°C) 0.1°F/°C 0.95 adjustable 16:1

42542
-58°to 1832°F (-50 to 1000°C) ±2% of rdg or 4°F/ 2°C whichever is greater <932°F (500°C); ±(2.5%rdg + 5°)>932°F (500°C) 0.1°F/°C 0.1 to 1.00 adjustable 30:1

42545
-58 to 1832°F -50 to 1000°C ±2%+2°< 932°F (500°C) ±2.5%+5° > 932°F (500°C) 0.1°F/°C 0.1 to 1 adjustable 50:1

42560
-58 to 1022°F / -50 to 1050°C IR: ±2% or ±4°F/2°C Type K: ±1.5% ±5°F/3°C 0.1°F/°C 0.1 to 1.00 Adjustable 30:1

42570
-58 to 3992°F / -50 to 2200°C IR: ±1% or ±2°F/1°C 0.1°F/°C 0.10 to 1.00 Adjustable 50:1

42570
-58 to 3992°F / -50 to 2200°C IR: ±1% or ±2°F/1°C 0.1°F/°C 0.10 to 1.00 Adjustable 50:1

42582
-40 to 932°F (-40 to 500°C) Thermistor: -4 to 300°F (-20 to 150°C) ±2% of rdg or ±4°F/2°C Thermistor: ±1.4°F/0.8°C 0.1°F/°C (<100°) 1°F/°C 0.3 to 1.0 Adjustable 8:1
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