Fluke 820-2 LED Stroboscope

Fits mechanical maintenance and speed checks where you need a quartz-controlled LED strobe from 30–300,000 FPM with adjustable pulse duration/delay and an optional external trigger — not a vibration analyzer.

Key advantages

• 30–300,000 FPM flash — quartz-controlled LED strobe covering 0.5–5,000 Hz with 0.02% (±1 digit) accuracy.
• Bright 7-LED array — ~6500 K; 4,800 lx @ 6,000 FPM at 30 cm with adjustable pulse duration/delay.
• External trigger ready — 3–32 V high / <1 V low input; minimum pulse 50 μs for machine sync.
• Pocket field kit — 3× AA alkaline; 0.24 kg; multi-line LCD in FPM or Hz with 2× / ÷2 shortcuts.

Typical applications

• Mechanical maintenance speed and alignment checks on rotating equipment.
• Freeze-frame inspection of fans, belts, and rollers without contact probes.
• Machine builds that need an external-trigger strobe synced to a process pulse.

Selection guide

• Flash frequency — 30–300,000 FPM (0.5–5,000 Hz).
• Accuracy — 0.02% (±1 digit).
• Light output — 7-LED array flash; ~6500 K; 4,800 lx @ 6,000 FPM at 30 cm; adjustable pulse duration/delay (μs or degrees).
• Controls — Quartz-accuracy control; 2× and ÷2 buttons; multi-line LCD (FPM or Hz).
• External trigger — Input 3–32 V high / <1 V low; minimum pulse 50 μs.
• Supply — 3× AA alkaline LR6 (per OEM users manual).
• Ambient — Operating 0…+45 °C; storage −10…+50 °C; operating altitude 2,000 m.
• Mounting — Handheld portable stroboscope.
• Weight / size — 0.24 kg; 5.71 × 6.09 × 19.05 cm.
• Approvals — CE; Class III (SELV) Pollution Degree 2; EN61326-1:2006; MIL-PRF-28800F Class 2 vibration; 1 m drop.

Common mistakes

• Treating lux figures as constant — OEM documentation quotes 4,800 lx @ 6,000 FPM at 30 cm; intensity changes with FPM and distance.
• Ignoring external-trigger levels (3–32 V high / <1 V low; min 50 μs) when syncing to machine sensors.
• Expecting a published IP rating from this page — not present in the OEM extract; state enclosure duty in the RFQ if critical.
• Using outside 0…+45 °C operating ambient without checking storage/operating limits.
• Assuming vibration analysis spectra — 820-2 is a stroboscope for visual freeze/speed checks.
• Test & measurement instruments · Test & measurement buying guide

When to RFQ / what to tell us

1. Target flash frequency band (FPM or Hz) and whether 2× / ÷2 workflow is primary.
2. Need for adjustable pulse duration/delay (μs or degrees).
3. External trigger source voltage and pulse width (must meet 3–32 V / 50 μs min if used).
4. Viewing distance / ambient light (relates to the 4,800 lx @ 30 cm reference point).
5. Quantity, ship-to country, spare battery preference (3× AA).

Request a Quote · Get selection help

Specs

Documents

• Fluke 820-2 datasheet (PDF)

FAQ

Q: What flash range and accuracy? A: 30–300,000 FPM (0.5–5,000 Hz) at 0.02% (±1 digit). Lock FPM vs Hz display preference in the RFQ.

Q: Can I sync to an external sensor? A: Yes — external trigger input accepts 3–32 V high / <1 V low with minimum pulse 50 μs. Confirm your sensor signal levels.

Q: How bright is the LED array? A: OEM documentation lists ~6500 K and 4,800 lx @ 6,000 FPM at 30 cm; treat that as a reference point, not a constant.

Q: What should I send for a quote? A: Frequency band, trigger need, quantity, ship-to. Compatible with workflows using Fluke 820-2 — we do not claim authorized-dealer status.

Links

• Test & measurement instruments · Test & measurement buying guide
• Request a Quote · Get selection help