Mechanical Testing Tachometers Contact & non-contact RPM measurement. TachometerContact / LaserTM-5210Dual-mode contact & non-contact tachometer up to 200,000 RPM with ±0.05% accuracy. View Product Quick view — Mechanical Testing Quick Reference Model Comparison ModelTypeMeasurement ModesRangesAccuracy / Resolution TM-5210Digital tachometerContact & Non-contactSurface wheel / cone tip; laser/photoContact 2–20,000 RPM; Non-contact 2–200,000 RPM±0.05% + 1 digit; to 0.001 RPMView