Timers
Timers can be clocks, stopwatches or any mechanical or electronic device used for accurate timekeeping. Stopwatches count up from zero whilst timers count down. The display can be analogue or digital and for laboratory or fieldwork, they are usually shockproof and water-resistant. Stopwatches can be manually operated or fully-automated, in which the start and stop is controlled by sensors. Often double or triple display timers are used since they can measure more then one experiment or procedure simultaneously. Some devices include a timer, stopwatch and clock in one device. Controlled power strips can be plugged into a device and can be programmed to turn on and off at specific intervals over a day or even a week. Some devices contain an alarm system which can be audible or bright flashing LED. Digital timers with a crystal oscillator timing element contain a microchip which can be connected to external sensors or triggered by external events. Atomic wall clocks are accurate to one hundred billionth of a second. Timers are extremely important in all laboratories to measure the duration of an experiment or a procedure. Precision is vital because the findings or effects may vary after one millisecond and so quartz-powered devices are chosen.
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H-B INSTRUMENT DURAC 3-CHANNEL ELECTRONIC TIMER AND CLOCK (1 Supplier)
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Heathrow Scientific Colony Counter ECOUNT PEN HS120000 - Colony counter eCount (1 Supplier)
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Heathrow Scientific Four Channel Timer Lab Alert HS24670 - General Lab (1 Supplier)
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Heathrow Scientific LLC Lab Alert Pocket Timer/HS24490D - General Lab (1 Supplier)
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Heidolph EKT Hei-Con G Glass Coated Sensor 5098810000 - General Lab (1 Supplier)
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Heidolph EKT Hei-Con Stainless Steel Sensor 5098800000 - General Lab (1 Supplier)
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Heidolph LCD Display with angle 1100801479 - General Lab (1 Supplier)
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Heidolph Pcb Digital Display Smg 13225002390 - General Lab (1 Supplier)
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Heidolph Timer clock 14-001-006-21 - General Lab (1 Supplier)
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Helix Strobe Alarm with 105 db siren (1 Supplier)
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HELLMA Cuvets Quartz Glass 12.5 x 45mm 100-10-40 - UV Cuvettes (1 Supplier)
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Hellma Cuvets Quartz Glass 12.5 x 45mm 100-20-40 - UV Cuvettes (1 Supplier)
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Hellma Cuvets Quartz Glass 12.5 x 45mm 104-10-40 - UV Cuvettes (1 Supplier)
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Hellma Cuvets Quartz Glass 12.5 x 45mm 104-B-10-40 - UV Cuvettes (1 Supplier)
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Hellma Cuvets Quartz Glass 12.5 x 45mm 110-10-40 - UV Cuvettes (1 Supplier)
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Hellma Cuvets Quartz Glass 12.5 x 45mm 6040-UV-10-531 - UV Cuvettes (1 Supplier)
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Hellma Flow-through cuvette 178.710-QS, 50mm thickness 1787101550-40 - General Lab (1 Supplier)
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Hellma Fluorescence Macro-Cuvets 12.5X45mm 101-10-K-40 - General Lab (1 Supplier)
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Hellma Half-micro-cuvette 104-QX, 10mm thickness 104-10-46 - General Lab (1 Supplier)
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Hellma Half-micro-cuvette 109.004-QS, 10mm thickness 109-004-10-40 - General Lab (1 Supplier)
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Hellma Half-micro-cuvette 109.004-QS, 10x4mm thickness 109004F-10-40 - General Lab (1 Supplier)
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HELLMA Macro-Cuvette 100-QS 50mm Quartz Glass 100-50-40 - UV Cuvettes (1 Supplier)
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Hellma Macro-cuvette 100-QX, 2mm thickness 100-2-46 - Macro cells for absorption measurement, UV- Range, quarz glass SUPRASIL® 300 (1 Supplier)
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Hellma Macro-cuvette 100-QX, 40mm thickness 100-40-46 - Macro cells for absorption measurement, UV- Range, quarz glass SUPRASIL® 300 (1 Supplier)
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Hellma Macro-cuvette 100-QX, 50mm thickness 100-50-46 - Macro cells for absorption measurement, UV- Range, quarz glass SUPRASIL® 300 (1 Supplier)
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