Amprobe TACH-10

Accurate up to 0.1%, 0.0001 to 1 RPM Resolution, Contact and Noncontact Tachometer

Extech 461825

Accurate up to 0.1%, 0.1 (5 to 999.9) and 1 (1,000 to 99,999) RPM Resolution, Contact Tachometer

Extech 461895

Accurate up to 0.05%, 0.1 (5 to 999.9) and 1 (1,000 to 99,999) RPM Resolution, Contact Tachometer

Extech 461950

Accurate up to 0.05%, 0.1 and 0.1 (5 to 1,000) and 1 (1,000 to 9,999) and 10 (10,000 to 99,990) RPM Resolution, Noncontact Tachometer