| Technical specifications |
| Range (for extended distances, use a target plate) |
| Fluke 411D | 0.1 m to 30 m |
| (0.33 ft to 100 ft) | | Fluke 416D | 0.05 m to 60 m |
| (0.16 ft to 200 ft) | | Fluke 421D | 0.05 m to 100 m |
| (0.16 ft to 330 ft) |
|
| Measuring accuracy |
| Fluke 411D* | ± 3 mm (0.118 in) | | Fluke 416D** | ± 1.5 mm (± 0.059 in) | | Fluke 421D | ± 1.5 mm (± 0.059 in) |
|
| Laser class |
| Fluke 411D | Class II | | Fluke 416D | Class II | | Fluke 421D | Class II |
|
| Laser type |
| Fluke 411D | 635 nm, < 1 mW | | Fluke 416D | 635 nm, < 1 mW | | Fluke 421D | 635 nm, < 1 mW |
|
| Automatic power off |
| Fluke 411D | after 180 seconds | | Fluke 416D | after 180 seconds | | Fluke 421D | after 180 seconds |
|
| Continuous measurement |
| Fluke 411D | Yes | | Fluke 416D | Yes | | Fluke 421D | Yes |
|
| Addition/subtraction |
| Fluke 411D | Yes | | Fluke 416D | Yes | | Fluke 421D | Yes |
|
| Battery life |
| Fluke 411D | up to 3,000 measurements | | Fluke 416D | up to 5,000 measurements | | Fluke 421D | up to 5,000 measurements |
|
| LCD illumination |
| Fluke 411D | No | | Fluke 416D | Yes | | Fluke 421D | Yes |
|
| Data locations |
| Fluke 411D | No | | Fluke 416D | 10 | | Fluke 421D | 20 |
|
| Min/Max |
| Fluke 411D | No | | Fluke 416D | Yes | | Fluke 421D | Yes |
|
| Audible feedback |
| Fluke 411D | No | | Fluke 416D | Yes | | Fluke 421D | Yes |
|
| Pythagoras (Indirect measurement) |
| Fluke 411D | Simple | | Fluke 416D | Full | | Fluke 421D | Full |
|
| Ingress protection |
| Fluke 411D | IP40 | | Fluke 416D | IP54 | | Fluke 421D | IP54 |
|
| Dimensions |
| Fluke 411D | 123 mm x 50 mm x 26 mm |
| (4.84 in x 1.97 in x 1.02 in) | | Fluke 416D | 135 mm x 46 mm x 31 mm |
| (5.31 in x 1.81 in x 1.22 in) | | Fluke 421D | 127 mm x 52 mm x 29 mm |
| (5.00 in x 2.06 in x 1.13 in) |
|
| Weight |
| Fluke 411D | 150 g (5.29 oz) | | Fluke 416D | 110 g (3.88 oz) | | Fluke 421D | 125 g (4.40 oz) |
|
| Temperature range |
| Fluke 411D | Storage: -25 °C to 70 °C (-13 °F to 158 °F)
|
| Operation: 0 °C to 40 °C (32 °F to 104 °F) | | Fluke 416D | Storage: -25 °C to 70 °C (-13 °F to 158 °F)
|
| Operation: 0 °C to 40 °C (32 °F to 104 °F) |
Fluke 421D |
-25 °C to 70 °C (-13 °F to 158 °F)
|
| 0 °C to 40 °C (32 °F to 104 °F) |
|
Operating altitude
(ISO 9022) |
| Fluke 411D | up to 3500 m | | Fluke 416D | up to 3500 m | | Fluke 421D | up to 3500 m |
|
Storage humidity
(at 35 °C) |
| Fluke 411D | maximum 85 % for 24 h | | Fluke 416D | maximum 85 % for 24 h | | Fluke 421D | maximum 85 % for 24 h |
|
| Batteries |
| Fluke 411D | AAA (2) | | Fluke 416D | AAA (2) | | Fluke 421D | AAA (2) |
|
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