Use this tachometer from Testo to measure the rotational speed of an object. The device has contact and non-contact dual functionality for use in a variety of applications. The contact tachometer mode uses one of the contact wheels provided to physically measure rotation, while the non-contact tachometer mode uses the self-reflective adhesive stickers to optically measure an object's rotation. Readings are displayed on the backlit LCD (liquid-crystal display) screen, which is easy to read even in dark or poorly lit work areas.

• Compact dimensions of 175 (length) x 60 (width) x 28mm (depth) for handheld use
• Broad operating temperature range of 0°C to +50°C for use in a variety of environments
• Measures rotational speeds of up to 99,999rpm for use in high-speed applications
• High accuracy of ±0.02% gives you precise readings
• Supplied with AA batteries, soft protective case and a set of reflective markers for convenient use

• Marine engineering
• Haemodynamics
• Laser instruments
• Laboratories

This tachometer runs on AA batteries that have a lifespan of 40 operating hours for long-lasting use.