Editor’s note: Originally published December 2020. Reviewed and updated November 2026. Some models mentioned here may have been updated or discontinued since; check current availability and specifications before buying.
Quick answer
- The Fluke 59 Max is the more affordable option, with an 8:1 distance-to-spot ratio (10:1 on the 59 Max Plus), and it is best suited to close-range readings.
- The Fluke 62 Max adds a 10:1 ratio, tighter listed accuracy (±1.5°C vs ±2°C), IP54 dust and splash protection and a 3-meter drop rating.
- The Fluke 62 Max Plus has the longest reach (12:1) and the highest top temperature (650°C / 1202°F), but shorter listed battery life.
- Pick the 59 Max for occasional home or workshop use; pick a 62 for tougher job-site conditions.
The Fluke 59 Max and 62 Max are non-contact infrared thermometers for checking surface temperatures you can’t easily reach or touch, from engines and electrical panels to HVAC vents. The 59 Max is the budget-friendly choice for close-range readings, while the 62 Max is tougher, more accurate and reads from farther away.
Each series also comes in a “Max Plus” version with a higher distance-to-spot ratio. This comparison is based on Fluke’s listed specifications at the time of writing. If you are new to IR thermometers, start with our explainer on infrared vs probe thermometers.
Fluke 59 Max vs 62 Max at a glance
| Feature | 59 Max | 59 Max Plus | 62 Max | 62 Max Plus |
|---|---|---|---|---|
| Distance-to-spot ratio | 8:1 | 10:1 | 10:1 | 12:1 |
| Temperature range | -22°F to 932°F (-30°C to 500°C) | Same as 59 Max | -22°F to 932°F (-30°C to 500°C) | Up to 1202°F (650°C) |
| Listed accuracy | ±2°C | ±2°C | ±1.5°C | Not listed separately |
| Protection | IP40 | IP40 | IP54, 3 m drop | IP54, 3 m drop |
| Listed battery life | Not listed | Not listed | 10 hours | 8 hours |
What is distance-to-spot ratio?
An IR thermometer measures the average temperature of a circular spot. The distance-to-spot (D:S) ratio tells you how big that spot is at a given distance. At 8:1, standing 8 inches away measures a 1-inch spot; at 12:1, you can stand 12 inches away for the same spot size. A higher ratio lets you measure smaller or more distant targets without picking up the surroundings.
Fluke 59 Max
The 59 Max is the more affordable of the two series. It uses laser sighting to show where you’re aiming, has a large backlit LCD and is light and compact enough to fit in a toolbox. Its IP40 rating gives basic protection against solid objects, but it isn’t weatherproofed or drop tested like the 62.
With an 8:1 ratio, the 59 Max works best for close-range measurements. The 59 Max Plus raises the ratio to 10:1 for readings at a greater distance, while keeping the same weight, features and accuracy.
Listed specifications:
- Distance-to-spot ratio: 8:1 (10:1 on the 59 Max Plus)
- Temperature range: -22°F to 932°F (-30°C to 500°C)
- Accuracy: ±2°C
- Display: large backlit LCD
- Protection: IP40
Pros
- Lower price than the 62 series
- Lightweight and compact for a toolbox
- Wide temperature range
Cons
- Not weatherproofed or drop tested like the 62 series
- Single laser makes the measurement area less precise to target
- Lower D:S ratio limits longer-distance readings
Fluke 62 Max
The 62 Max is aimed at mechanical, electrical, automotive and HVAC work. It has a 10:1 D:S ratio, laser sighting to pinpoint the measurement area, and a display that shows minimum, maximum, average and difference readings. Listed accuracy is ±1.5°C.
It is built for rough conditions: the IP54 rating means protection against dust and splashing liquid, and Fluke rates it to survive a 3-meter drop. It is small enough to clip to a tool belt, and the backlit display is easy to read in the dark.
The 62 Max Plus adds a 12:1 ratio for slightly longer distances and extends the top of the range to 650°C (1202°F). The trade-off is listed battery life of 8 hours, compared with 10 hours for the 62 Max.
Listed specifications:
- Distance-to-spot ratio: 10:1 (12:1 on the 62 Max Plus)
- Temperature range: -22°F to 932°F (-30°C to 500°C); up to 1202°F (650°C) on the 62 Max Plus
- Accuracy: ±1.5°C
- Display: backlit, with min, max, average and difference readings
- Protection: IP54, 3-meter drop rating
- Battery life: 10 hours (8 hours on the 62 Max Plus)
Pros
- Laser targeting with dual lasers in the 62 series (per the original listing)
- Dust and water resistant and drop rated to 3 meters
- Compact, ergonomic design that clips to a belt
- Min/max/average/difference readings
Cons
- Costs more than the 59, especially the 62 Max Plus
- Shorter battery life on the Max Plus
Which should you choose?
- Choose the Fluke 59 Max if you want an affordable, accurate IR thermometer for close-range checks at home or in the workshop and don’t need weather or drop protection.
- Choose the Fluke 59 Max Plus if you want the 59’s price bracket with a bit more reach (10:1).
- Choose the Fluke 62 Max for job-site use where dust, splashes and drops are likely, or if you want tighter listed accuracy.
- Choose the Fluke 62 Max Plus if you need the longest reach (12:1) or readings above 932°F, and can live with shorter battery life.
Bottom line
The Fluke 59 Max covers basic non-contact measurement for less, while the 62 Max is the more rugged, more accurate tool for professional settings. If you need a full heat map rather than spot readings, look at Fluke thermal imaging cameras, and if you are on a tighter budget, see our guide to infrared thermometers under $100.
FAQ
Is the Fluke 62 Max more accurate than the 59 Max?
According to the listed specifications, yes: ±1.5°C for the 62 Max versus ±2°C for the 59 Max.
Is the Fluke 59 Max waterproof?
No. It has an IP40 rating and is not weatherproofed. The 62 Max is IP54 rated for dust and splashing liquid.
What does Max Plus add?
A higher distance-to-spot ratio: 10:1 instead of 8:1 on the 59, and 12:1 instead of 10:1 on the 62. The 62 Max Plus also reads up to 650°C (1202°F).
