General-purpose stopwatch times to 24 hours. Timing resolution is 1/100 of a second for the first 30 minutes, then continues timing to 23 hours, 59 minutes, 59 seconds, with a 1-second resolution. Accuracy is always 0.01%. Digits are 1/4-inch-high. O-ring-sealed and shock-proof ABS plastic case is ideal for lab and plant use. Unit is Water-Resistant to three atmospheres. Tactile-feel, click switches provide a positive action. 

An individually-numbered Traceable Certificate provided with each unit, assures accuracy from our ISO/IEC 17025:2005 (1750.01) calibration laboratory accredited by A2LA.  It indicates traceability of measurements to the SI units through NIST or other recognized national measurement institutes (NMI) that are signatories to the CIPM Mutual Recognition Agreement.

Supplied with Traceable Certificate, battery and lanyard.