Image unavailable
Image unavailable
Extech
Extech RPM33 Contact/Laser Photo Tachometer
Quote on request
No online payment · add lines to RFQ BOM
RPM33: contact 2–20k / laser 2–99,999 rpm; 0.05%+1d; surface speed. RFQ.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Accuracy
0.05% of reading + 1 digit (photo and contact)
Display
5-digit backlit LCD
Photo Rpm Range
2 to 99,999 rpm (laser photo / strobe mode)
Contact Rpm Range
2 to 20,000 rpm
Resolution
0.1 rpm (<10,000 rpm); 1 rpm (>10,000 rpm)
Surface Speed
0 to 78,720 in/min; 0 to 6,560 ft/min; 0 to 2,186 yards/min; 0 to 2,000 m/min
Fits RPM and surface-speed checks where you need an Extech RPM33—contact 2–20,000 rpm and laser 2–99,999 rpm (to about 500 mm) with 0.05% of reading + 1 digit accuracy and a contact wheel for linear speed.
Key advantages
- Contact RPM — 2–20,000 rpm
- Laser RPM — 2–99,999 rpm; ~500 mm standoff
- Accuracy — 0.05% of reading + 1 digit
- Surface speed — 0–2000 m/min (0–6560 ft/min)
- Memory — 10 sets with max/min/avg; 9 V
Typical applications
- Motor / fan RPM.
- Conveyor surface speed.
- Safe laser RPM at distance.
Selection guide
- Reflective tape stock
- NIST option
- Wheel accessories
Common mistakes
- Laser beyond 500 mm.
- Wrong contact tip for surface.
- Missing tape reflectivity.
When to RFQ / what to tell us
- NIST option, quantity.
- Ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 39108 |
| Brand | Extech |
| Model | RPM33 |
| Product type | Tachometer |
| Type | Contact / laser photo tachometer (Extech RPM33) |
| Contact rpm | 2–20,000 rpm |
| Laser rpm | 2–99,999 rpm; up to ~500 mm |
| Accuracy | 0.05% of reading + 1 digit |
| Surface speed | 0–2000 m/min (0–6560 ft/min) contact wheel |
| Memory | 10 data sets (meas/max/min/avg); 9 V |
Documents
FAQ
Q: Laser max RPM? A: 99,999 rpm.
Q: Accuracy? A: 0.05% of reading + 1 digit.
Q: What should I send for a quote? A: Options/quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Accuracy | 0.05% of reading + 1 digit (photo and contact) |
| Display | 5-digit backlit LCD |
| Photo Rpm Range | 2 to 99,999 rpm (laser photo / strobe mode) |
| Contact Rpm Range | 2 to 20,000 rpm |
| Resolution | 0.1 rpm (<10,000 rpm); 1 rpm (>10,000 rpm) |
| Surface Speed | 0 to 78,720 in/min; 0 to 6,560 ft/min; 0 to 2,186 yards/min; 0 to 2,000 m/min |
| Surface Length | 3.9 to 39,370 in; 0.3 to 3,280 ft; 0.1 to 1,093 yards; 0.1 to 1,000 m |
| Sampling Time Photo | 0.5 s (>120 rpm) |
| Laser Distance | Up to 1.6 ft / 500 mm non-contact |
| Memory | Store/recall 10 data sets with measurement, max, min, average |
| Power | 1 × 9V battery |
| Dimensions | 6.2 × 2.3 × 1.6 in (160 × 60 × 42 mm) |
| Weight | 5.3 oz (151 g) |
| Certifications | CE; NIST option (RPM33-NIST) |