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  • Easy, Flexible Operation

    View data on both the large backlit LCD display and from iOS® or Android™ mobile devices using the ExView app via Bluetooth.

  • Standalone Capture and Display

    Take non-contact RPM measurements of rotating objects up to 500 mm (1.64 ft) and count up to 99,000; freeze the display with ‘data hold’ feature.

  • Portable Collection, Analysis, and Reporting

    Export .CSV data; create and send PDF reports including photos of the measurement location taken with a connected smartphone or tablet camera.

General Specifications
Measurement Angle
±30° from perpendicular
Measurement Distance
50 to 500 mm
Revolution Count (Photo)
0 to 99999
Revolution Count (Photo) Basic Accuracy
±2 digits
Revolution Count (Photo) Max Resolution
Rotation Speed [Photo]
10 to 99999 rpm
Rotation Speed [Photo] Basic Accuracy
Rotation Speed [Photo] Max Resolution
0.1 rpm (<9999.9 rpm), 1 rpm (≥10000 rpm)
Sampling Time (Photo)
1 s (>120 rpm)
Sensor Type
Photodiode and laser tube
Wireless Connectivity
Bluetooth® (via ExView iOS/Android mobile app)
Wireless Transmission Range
up to 90 m line of sight
Additional Details
CE, FCC, UKCA, IEC60825-1:2014 CLASS 3R
4.7 × 2.1 × 1.1 in (120 × 53 × 28 mm)
5-digit (99999-count) backlit segment LCD display
Operating Conditions
32 to 104°F (0 to 40°C),≤80% RH
3 × AAA (1.5V) batteries
2 years
2.9 oz (81.6 g)
Related Documents
Export Restrictions

Export Restrictions

The information contained in this page pertains to products that may be subject to the International Traffic in Arms Regulations (ITAR) (22 C.F.R. Sections 120-130) or the Export Administration Regulations (EAR) (15 C.F.R. Sections 730-774) depending upon specifications for the final product; jurisdiction and classification will be provided upon request.

Extech RPM250W