Fluke 566 Infrared & Contact Thermometer

The Fluke 566 Infrared & Contact Thermometer is a versatile handheld temperature measurement instrument designed for demanding industrial environments. It combines infrared measurement with a K-type thermocouple input, allowing users to select either non-contact or contact measurement depending on the application.

Its rugged ergonomic design, simple three-button interface and graphical display make the Fluke 566 suitable for technicians who need reliable temperature measurements during routine inspection, troubleshooting and maintenance.

Two Measurement Methods in One Instrument

The Fluke 566 provides an infrared measurement range of -40 °C to 650 °C, allowing technicians to measure hot, moving or difficult-to-access surfaces without physical contact.

For applications requiring direct contact measurement, the instrument accepts K-type thermocouples with an input range of -270 °C to 1372 °C. A K-type bead probe is included with the standard instrument.

Long-Distance Measurement with 30:1 Targeting

The 30:1 distance-to-spot ratio allows the Fluke 566 to measure smaller targets from a greater distance than many general-purpose infrared thermometers.

The minimum measurement spot size is 19 mm, while the single-point Class II laser helps users identify the measurement area quickly.

This is particularly useful when inspecting:

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  Electrical connections
  
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  Motors and bearings
  
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  Pumps and compressors
  
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  Pipes and process equipment
  
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  Mechanical components
  
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  Heating equipment
  
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  Industrial machinery
  

Adjustable Emissivity for Different Materials

The Fluke 566 provides digitally adjustable emissivity from 0.10 to 1.00 in 0.01 increments and includes a built-in table of common materials.

Adjustable emissivity helps users compensate for differences in surface characteristics when measuring metals, painted surfaces, plastics and other materials.

Key Specifications

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  Infrared temperature range: -40 °C to 650 °C
  
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  K-type thermocouple input: -270 °C to 1372 °C
  
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  IR accuracy above 0 °C: ±1% or ±1 °C, whichever is greater
  
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  IR accuracy below 0 °C: ±(1.0 °C + 0.1 °C/°C)
  
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  Distance-to-spot ratio: 30:1
  
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  Minimum spot size: 19 mm
  
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  Spectral response: 8 μm to 14 μm
  
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  IR response time: <500 ms
  
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  Display resolution: 0.1 °C / 0.1 °F
  
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  Emissivity: 0.10 to 1.00, digitally adjustable
  
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  Data storage: 20 time-stamped measurement points
  
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  Laser: Single-point Class II laser
  
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  Temperature functions: MAX, MIN, AVG and DIF
  
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  Alarms: Audible and two-color visual high/low alarms
  
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  Power: 2 AA batteries
  
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  Operating temperature: 0 °C to 50 °C
  
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  Weight: Approximately 0.322 kg
  

Temperature Alarms and Measurement Functions

The Fluke 566 provides high and low temperature alarms with both audible and two-color visual indications. Technicians can set temperature limits and quickly identify measurements outside the acceptable range.

Additional measurement functions include:

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  Maximum temperature
  
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  Minimum temperature
  
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  Average temperature
  
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  Differential temperature
  
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  Hold function
  
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  Trigger lock
  
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  Celsius/Fahrenheit selection
  

These functions make the instrument useful for both individual measurements and repeated equipment inspection.

Data Logging for Field Inspection

The Fluke 566 can store up to 20 measurement points with date and time stamps, allowing technicians to record important temperature readings during inspection routes and review them later.

The two-level backlight also provides improved visibility when working in darker industrial environments.

Industrial Applications

The Fluke 566 is suitable for temperature measurement and troubleshooting across a range of industrial environments, including:

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  Electrical maintenance
  
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  Mechanical maintenance
  
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  Industrial equipment inspection
  
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  Motor and pump inspection
  
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  Bearing temperature checks
  
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  HVAC and mechanical systems
  
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  Process equipment
  
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  Heating systems
  
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  Machinery troubleshooting
  
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  Preventive maintenance
  
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  General temperature inspection
  

Rugged Handheld Design

The Fluke 566 is designed for use in demanding industrial, electrical and mechanical environments. Its ergonomic housing and straightforward graphical interface provide practical operation for technicians performing repeated measurements in the field.

The instrument operates on two AA batteries, with typical battery life of approximately 12 hours when the laser and backlight are continuously active, or up to 100 hours with the laser and backlight off.

Included Accessories

The standard Fluke 566 package includes:

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  K-type thermocouple bead probe
  
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  Durable hard carrying case
  
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  2 AA batteries
  
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  Getting Started guide
  
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  User manual
  
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  2-year warranty
  

FAQ

What is the temperature range of the Fluke 566?

The Fluke 566 measures infrared temperatures from -40 °C to 650 °C. Its K-type thermocouple input supports a much wider range of -270 °C to 1372 °C.

What is the distance-to-spot ratio of the Fluke 566?

The Fluke 566 has a 30:1 distance-to-spot ratio, allowing measurements of smaller targets from greater distances.

Does the Fluke 566 support contact temperature measurement?

Yes. The Fluke 566 accepts K-type thermocouples and includes a K-type bead probe as standard.

Can the emissivity be adjusted?

Yes. Emissivity can be digitally adjusted from 0.10 to 1.00 in 0.01 increments, or selected from the built-in table of common materials.

How many measurements can the Fluke 566 store?

The Fluke 566 can store up to 20 time-stamped measurement points.

Does the Fluke 566 have temperature alarms?

Yes. It provides audible and two-color visual high/low alarms that can alert users when measured temperatures exceed configured limits.