HT2234N model is a digital portable meter which can perform accurate speed measurements of rotating mechanical elements (rotating disks, motor parts, etc.) with or without contact using a laser emission ray transmitted and received from the object under test. As auxiliary feature HT2234N has an internal event counter which is very important for example on end-of-line factory controls. HOLD and MIN/MAX/AVE features are also performed by this meter. A wide number of accessories are included for speed measurements with direct contact with the object under test.