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Extech
Extech 461825 Photo Tachometer / Stroboscope
Quote on request
No online payment · add lines to RFQ BOM
Photo 0.5–20,000 RPM; strobe to 99,999; ±(0.1%+2d). RFQ + selection help.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Accuracy
±(0.1% + 2 digits)
Display
5-digit LCD 0.4"; characters reverse by mode
Photo Tach Range
0.5 to 20,000 RPM
Strobe Range
5 to 99,999 RPM / FPM class
Surface Speed
0.2 to 6560 ft/min (photo/contact literature)
Resolution
0.1 RPM (<1000); 1 RPM (≥1000); strobe 0.1/1 FPM bands
Fits combined photo RPM and strobe inspection where you need an Extech 461825 covering photo 0.5–20,000 RPM and strobe to 99,999 RPM/FPM with Last/Max/Min memory.
Key advantages
- Photo tach — 0.5 to 20,000 RPM
- Strobe — 5 to 99,999 RPM/FPM class
- Accuracy — ±(0.1% + 2 digits)
- Surface speed — 0.2 to 6560 ft/min (literature)
- Kit — Reflective tape, carrying case, 4× AA
Typical applications
- Noncontact RPM with reflective tape.
- Strobe freeze-motion inspection.
- Maintenance kits needing both modes.
Selection guide
- Mode — Photo vs strobe
- Resolution bands — 0.1 vs 1 RPM/FPM
- Memory — Last/Max/Min
- Accessories — Tape/case
Common mistakes
- Using strobe as precision tach without understanding flash sync.
- Missing reflective tape in photo mode.
- Exceeding sampling-time assumptions at very low RPM.
When to RFQ / what to tell us
- Accessories; quantity; ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 23897 |
| Brand | Extech |
| Model | 461825 |
| Product type | Tachometer / Stroboscope |
| Photo tach range | 0.5 to 20,000 RPM |
| Strobe range | 5 to 99,999 RPM / FPM class |
| Accuracy | ±(0.1% + 2 digits) |
| Surface speed | 0.2 to 6560 ft/min (photo/contact literature) |
| Resolution | 0.1 RPM (<1000); 1 RPM (≥1000); strobe 0.1/1 FPM bands |
| Sampling time | 1 s (>6 RPM photo; ≥60 RPM strobe) |
| Display | 5-digit LCD 0.4"; characters reverse by mode |
| Memory | Last / Max / Min |
| Power | 4 × 1.5 V AA |
| Dimensions | 215 × 65 × 38 mm (8.5 × 2.6 × 1.5 in) |
| Weight | 300 g (10.6 oz) |
| Included | Reflective tape, carrying case, batteries |
Documents
FAQ
Q: Photo range? A: 0.5 to 20,000 RPM.
Q: Includes? A: Reflective tape, carrying case, batteries.
Q: What should I send for a quote? A: Accessories, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Accuracy | ±(0.1% + 2 digits) |
| Display | 5-digit LCD 0.4"; characters reverse by mode |
| Photo Tach Range | 0.5 to 20,000 RPM |
| Strobe Range | 5 to 99,999 RPM / FPM class |
| Surface Speed | 0.2 to 6560 ft/min (photo/contact literature) |
| Resolution | 0.1 RPM (<1000); 1 RPM (≥1000); strobe 0.1/1 FPM bands |
| Sampling Time | 1 s (>6 RPM photo; ≥60 RPM strobe) |
| Memory | Last / Max / Min |
| Power | 4 × 1.5 V AA |
| Dimensions | 215 × 65 × 38 mm (8.5 × 2.6 × 1.5 in) |
| Weight | 300 g (10.6 oz) |
| Included | Reflective tape, carrying case, batteries |
| Form Factor | Combination photo tachometer + stroboscope |