Specifications

Feature

4180

4181

Temperature range 
(@ 23 °C ambient, 
0.95 emissivity)

–15 °C to 120 °C

35 °C to 500 °C

Total accuracy1

± 0.40 °C at –15 °C
± 0.40 °C at 0 °C
± 0.50 °C at 50 °C
± 0.50 °C at 100 °C
± 0.55 °C at 120 °C

± 0.35 °C at 35 °C
± 0.50 °C at 100 °C
± 0.70 °C at 200 °C
± 1.20 °C at 350 °C
± 1.60 °C at 500 °C

Stability

± 0.10 °C at –15 °C
± 0.05 °C at 0 °C
± 0.10 °C at 120 °C

± 0.05 °C at 35 °C
± 0.20 °C at 200 °C
± 0.40 °C at 500 °C

Uniformity2 
(5.0 in dia of center 
of target)

± 0.15 °C at –15 °C
± 0.10 °C at 0 °C
± 0.25 °C at 120 °C

± 0.10 °C at 35 °C
± 0.50 °C at 200 °C
± 1.00 °C at 500 °C

Uniformity2 
(2.0 in dia of center 
of target)

± 0.10 °C at -15 °C
± 0.10 °C at 0 °C
± 0.20 °C at 120 °C

± 0.10 °C at 35 °C
± 0.25 °C at 200 °C
± 0.50 °C at 500 °C

Heating time

15 min: –15 °C to 120 °C
14 min: 23 °C to 120 °C

20 min: 35 °C to 500 °C

Cooling time

15 min: 120 °C to 23 °C 
20 min: 23 °C to –15 °C

100 min: 500 °C to 35 °C
40 min: 500 °C to 100 °C

Stabilization time

10 minutes

10 minutes

Nominal emissivity3

0.95

0.95

Thermometer emissivity compensation

0.9 to 1.0

Target diameter

152.4 mm (6 in)

Computer interface

RS-232

Power

115 V ac (± 10%), 6.3 A, 
50/60 Hz, 630 W
230 V ac (± 10%), 3.15 A, 
50/60 Hz, 630 W

115 V ac (± 10%), 10 A, 
50/60 Hz, 1000 W
230 V ac (± 10%), 5 A, 
50/60 Hz, 1000 W

Fuse(s)

115 V ac 6.3 A, 250 V, slow blow
230 V ac 3.15 A, 250 V, T

115 V ac 10 A, 250 V, fast blow
230 V ac 5 A, 250 V, F

Size (HxWxD)

356 mm x 241 mm x 216 mm 
(14 in x 9.5 in x 8.5 in)

356 mm x 241 mm x 216 mm 
(14 in x 9.5 in x 8.5 in)

Weight

9.1 kg (20 lb)

9.5 kg (21 lb)

Safety

EN 61010-1:2001, CAN/CSA C22.2 No. 61010.1-04

1For 8 mm to 14 mm spectral band thermometers with emissivity set between 0.9 and 1.0. Includes stability, uniformity, emissivity, calibration and drift.
2The uniformity specification refers to how IR thermometers with different spot sizes both focused at the center of the target will measure the same temperature.
3The target has a nominal emissivity of 0.95, however it is radiometrically calibrated to minimize 
emissivity related uncertainties.