Fluke 561

Fluke 561 – Overview

The Fluke 561 combines non-contact infrared temperature measurement with contact measurement using Type K thermocouples. It enables technicians to measure both from a distance (IR) and directly via thermocouple probes, making it ideal for HVAC, electrical, industrial maintenance, refrigeration work, and situations where safety and access are important. It comes with a Velcro pipe probe for superheat / sub-cooling, a laser pointer for aiming, and has selectable emissivity for shiny or reflective surfaces.

Key Features

• Dual mode: infrared (non-contact) plus Type K contact thermocouple input

• Measures superheat and sub-cooling with included Velcro pipe probe

• Single-point laser sighting for targeting IR measurement spot

• Adjustable emissivity with three settings (low, medium, high) for accuracy on different surfaces

• MIN / MAX / DIF functions for identifying temperature extremes and differences

• Display hold & backlit LCD with dual readout (current & Max/Min/Dif/K-TC)

• Lightweight and portable (~340 grams)

• Operates on 2 AA batteries with approx. 12-hour battery life

Technical Specifications

• Temperature Range: −40 °C to +550 °C (−40 °F to +1022 °F)

• Display Resolution: 0.1 °C / 0.1 °F

• Distance-to-Spot Ratio (D:S): 12:1

• Emissivity Settings: low (0.30), medium (0.70), high (0.95)

• Display Accuracy: ±1.0 % of reading ±1° (°C/°F), whichever is greater; below 0 °C / 32 °F includes additional ±0.1°/°F per degree below

• Response Time: 500 ms (95 % of reading)

• Spectral Response: 8-14 µm

• Laser Sighting: Single-point laser; turns off above ambient temperature of approx. 40 °C (104 °F)

• Relative Humidity: 10-90 % RH non-condensing (at < 30 °C / 86 °F)

• Display Hold Time: 7 seconds

• Backlight: Yes (LCD with dual temperatures + mode indicator)

• Operating Temperature: 0 … +50 °C (32 … 120 °F)

• Storage Temperature: -20 … +65 °C (-25 … +150 °F)

• Power: 2 × AA batteries (alkaline or NiCD)

• Battery Life: Approx. 12 hours of active use

Applications

• HVAC/R diagnostics (superheat, sub-cooling, duct / pipe temperature)

• Electrical maintenance (checking hot spots, connections, insulation)

• Industrial & manufacturing processes needing both IR scanning and probe measurements

• Situations where measuring unreachable or energized surfaces safely matters

Why Choose Fluke 561

• Offers IR and contact thermometry in one tool, reducing need to carry separate instruments

• Adjustable emissivity helps improve accuracy on different surface types

• Pipe probe included, which adds versatility for HVAC and piping work

• Strong durability, user-friendly display, and built-in functions to simplify problem detection

Order Now

The Fluke 561 HVAC Infrared & Contact Thermometer is available for purchase. Ships worldwide.

Original Manufacturer Packaging

These products are industrial surplus items preserved in the original manufacturer box. Learn More

DDPARTSSOLUTION Packaging

These products are industrial surplus items shipped in secure DDPARTSSOLUTION protective packaging. Learn More

Refurbished

These products have been previously installed or may show cosmetic signs of prior handling. Learn More