The Pet 2100 and the 2500 have the same internal components, and are the best option. They sample at 20 times per second, compared to T-tach at 2 times per second. The 2500 is bulletproof, but more compicated than the 2100
Most customers choose the 2100, unless you are a professional tuner. The tach will check Rpm on anything from a weedwacker to a V-12 Diesel.
Is there a sampling rate difference for the PT2100DXR? There's no way this is 20 times/second. It's only updating slightly faster than my tiny tach. Still better, but nothing close to the hype. Definitely easier to use with the detachable lead.
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