The H-B Instruments DURAC Analog Stopwatch accurately measures spans of time, is RoHS compliant, and comes with a certificate of traceability to NIST and DAkkS. It has a crown stopper to activate, stop, and reset the clock. Above the crown is a ring that accepts a lanyard (sold separately) to free a user’s hands while keeping the stopwatch within reach. The watch is made of chromium-plated copper and is accurate to 0.2 seconds. Overall dimensions are 2.5 x 3.3 inches/63 x 83 mm (W x H). (W is width, the horizontal distance from left to right; H is height, the vertical distance from the lowest to highest point.)
H-B Instrument Company manufactures power controls, and time, temperature, density, and weather-related instruments. Founded in 1903, H-B Instrument Company is a division of Bel-Art Products, and is headquartered in Collegeville, PA.