Stopwatches
Stopwatches
Handheld or tabletop timepieces to measure elapsed time between activation and deactivation points; analog or digital; may be shockproof, waterproof, and/or traceable; may have multiple functions; may include a neck cord or other attachment device.
A laboratory stopwatch measures time intervals using specific activation and deactivation points.
Analog or mechanical stopwatches are typically controlled by two buttons. The first button starts the timer and the second stops the measurement, and the elapsed time is displayed. The time can be re-started by pressing the first button again, and the time is reset to zero by pressing the second button again. The second button may also allow for lap times or split times.
Mechanical stopwatches are spring-powered and have to be wound periodically. Digital stopwatches and timers are usually powered by a silver cell or lithium battery.
Digital electronic stopwatches or timers have crystal oscillator timing elements that make them much more accurate than mechanical versions. They may also display the date and time. Some stopwatches count by centiseconds (1/100 of a second), which is not to be confused with milliseconds.
Digital timers are now available with a number of useful features. Some have more than one timing channel and can be used to simultaneously measure the time for more than a single activity.
All stopwatches and timers can be calibrated and certified based on standards traceable to the National Institute of Standards and Testing (NIST). Certified timepieces can then be used to calibrate other devices for everyday use.
Large digital stopwatches found in sports stadiums and that can be seen from a distance are called stopclocks. Stopwatch functions may also be available on wristwatches, cell phones, computers, and other electronic devices.
Fisherbrand™ 3-Channel Countdown Timer
Runs three separate timers simultaneously. Fisherbrand™ 3-Channel Countdown Timer counts down from a maximum of 99 hours, 59 minutes, 59 seconds on each clock. Provides both audible and visual alarm.
Fisherbrand™ Traceable™ Waterproof/Shockproof Stopwatches
Digital Stopwatch. Choose from a waterproof/shockproof model or a water-/shock-resistant model.
Fisherbrand™ Traceable™ 24-Hour Stopwatches
Digital, handheld
Fisherbrand™ Water-Resistant, Shock-Resistant Stopwatch
NIST traceability assures quality and accuracy. Fisherbrand Water-Resistant, Shock-Resistant Stopwatch is a general-purpose, quartz LCD digital stopwatch with O-ring-sealed ABS plastic case and is ideal for rough use.
Traceable™ Big-Digit Stopwatch with Calibration
The jumbo digits and high accuracy of the Traceable Big-Digit Stopwatch with Calibration make it the perfect stopwatch for the lab or field. Display time of day, date and day of week. The ABS plastic case is water-, dust- and shock-resistant, with a handy clip and hoop and loop fasteners allows you to mount the stopwatch to various surfaces.
Fisherbrand™ Traceable™ Jumbo-Digit Stopwatch
Traceable™ Jumbo-Digit Stopwatch with the largest digits (1/2 in. high) provide ease in reading.
Fisherbrand™ 300 Memory Water-Resistant Stopwatch
Memory storage for 300 lap times. Water-Resistant Stopwatch has an O-ring-sealed and shock-resistant ABS plastic case with nonslip rubber sides.
Fisherbrand™ Traceable™ Kaleidoscope Stopwatches
Digital stopwatches with choice of six translucent colors—color code to a specific test or instrument. Traceable Kaleidoscope Stopwatch displays time of day in hour, minute, and second, AM/PM, date, and day of the week.
Fisherbrand™ Traceable™ Dual-Display Digital Stopwatch
Engineered for ease of operation, accuracy, and reliability. Fisherbrand Traceable Dual-Display Digital Stopwatches provide precise, Traceable timing for enzyme tests, viscosity measurements, animal studies, and all timed lab tests. They are made for scientists in industrial, educational, hospital, and governmental labs.
H-B Instrument™ DURAC™ Digital Stopwatches
Supplied with multi-language (English, French, German, Italian, Portuguese and Spanish) instructions, these electronic stopwatches include a calendar and a clock.
TFA Dostmann Mechanical Stopwatch
This mechanical stopwatch made of metal is particularly sturdy and always ready for use. The stopwatch is wound up by hand and then runs for up to 30 minutes. After the stop, you can read the time to 1/5 second. Carry bag and neck strap are included.
Brannan™ Water Resistant Stopwatch
1/100 second water resistant stopwatch to IP65.
TFA Dostmann Digital Stopwatch
This small and compact digital stopwatch is the ideal companion for leisure and work. It reliably measures the time to 1/100 second accuracy and can show split times. The stopwatch has useful additional functions, such as an hourly chime or an alarm with snooze function.
Heathrow Scientific™ Multi-Function Stopwatch / Clock
Counts up to 60 minutes with one button quick start and stop. heathrow Scientific™ Multi-Function Stopwatch / Clock also features time, split, hourly chime, calendar, alarm and includes 100cm neck cord.
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