The Fluke 561 Multipurpose Thermometer is a portable infrared and contact thermometer for various heating, ventilation and air conditioning monitoring tasks. It provides both non-contact infrared (IR) and contact temperature measurements, replacing the need for multiple test tools. Use the IR thermometer to measure hot, moving, electrically energized surfaces.
This manual introduces the Fluke 561, a combined infrared and contact thermometer designed for HVAC monitoring. It describes the included accessories such as a Velcro pipe probe, K‑type thermocouple, hand‑carrying case, and AA batteries, and explains how to use the IR sensor, laser sighting, and emissivity selector for accurate temperature readings.
Technical specifications are listed, covering temperature range, display resolution, response time, spectral focus, power source, and environmental limits. The document also details optional probe accessories, warranty information, and ordering references for the Fluke 561.
| Temperature range | -40° to 550°C |
|---|---|
| Display resolution | 0.1° of reading |
| Distance‑to‑spot ratio (D:S) | 12:1 |
| Emissivity selector settings | low (0.3), medium (0.7), high (0.95) |
| Display accuracy | ±1.0% of reading or ±1°C (whichever is greater) |
| Spectral focus | 8 µm to 14 µm |
| Laser power class | Class 2, <1 mW, 630‑670 nm |
| Power source | 2 AA batteries (alkaline or NiCD) |
| Weight | 340 g |
| Dimensions (HxLxW) | 176.9 mm × 163.6 mm × 518 mm |
| Operating temperature | 0° to 50°C |
| Storage temperature | -20° to 65°C |
| Battery life (alkaline) | 12 hours |
| Warranty | Two years |
The Fluke 561 can measure temperatures from –40 °C up to 550 °C.
The device has an easy emissivity selector with three preset settings: low (0.3), medium (0.7) and high (0.95).
It is powered by two AA batteries, either alkaline or NiCD.
The package includes a Velcro pipe probe, a K‑type thermocouple, a hand‑carrying case, two AA batteries, and the user manual with a measurement guide.