The Fluke 4180/4181 Series precision infrared calibrators are designed for calibrating infrared thermometers and thermal imagers. The 4180 covers -15°C to 120°C while the 4181 covers 35°C to 500°C, providing solutions for a wide range of IR temperature measurement devices.

The 152 mm (6-inch) target accommodates the field-of-view requirements of most common infrared thermometers that cannot be accurately tested with smaller targets. Uniformity across the target ensures that variations cannot be detected with a thermal imager at the proper calibration distance.

With accuracy as good as ±0.35°C, the 4180/4181 Series meets its specifications without additional emissivity-related corrections, achieving test uncertainty ratios (TUR) of 4:1. The target has a nominal emissivity of 0.95 and is radiometrically calibrated to minimize emissivity-related uncertainties.

The LCD display continuously shows current temperature and includes a safety feature indicating when the target exceeds 50°C. The indicator remains illuminated when powered and above 50°C, and flashes after power removal until the target cools below 50°C.

Heating time for the 4181 is 45 minutes to 500°C, with stabilization in 10 minutes. The unit includes RS-232 interface and comes with an NVLAP-accredited radiometric calibration report, target cover, user guide, and serial cable.

Features

• Two models cover -15°C to 500°C total range
• Display accuracy up to ±0.35°C
• Stability up to ±0.05°C
• Uniformity up to ±0.10°C within 2-inch target area
• 152 mm (6 inch) target accommodates most thermometers
• Radiometrically calibrated for traceable results
• Safety indicator for temperatures above 50°C
• Rapid heating and cooling
• RS-232 interface included
• NVLAP accredited calibration report included
• Lightweight and portable: 9.5 kg
• Thermometer emissivity compensation range: 0.9 to 1.0