If you need a portable, handheld tachometer, take a look at the HT-4100 from Ono Sokki Technology. This completely ergonomic device weighs less than 4 oz, so it slips right into your pocket. Setup is ...

The SE-1100 noncontact engine tachometer features an ignitionspark-detection method that makes it safe and easy to use. The handheld tach weighs about 110 gm including batteries. Rpm updates every ...