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TIMERS: Digital 4-modes, Mechanical (Smith’s NS-2 Equivalent), Multi-Timer ‘Event’ | Excellent for scientific demonstration

$ 37.80$ 325.50 excl. GST

Timers

A variety of Timers for use in the science laboratory.

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SKU: TIMERS-Digital-Mechanical-Event Categories: , Brand:

Description

[Wikipedia excerpt:   ‘….A ‘T’ is a specialized type of clock used for measuring specific time intervals. ‘T’ can be categorized into two main types. A ‘T’ which counts upwards from zero for measuring elapsed time is often called a stopwatch, while a device which counts down from a specified time interval is more usually called a ‘T’ . A simple example of this type is an hourglass. Working method ‘T’ have two main groups: Hardware and Software ‘T’ . Most ‘T’ give an indication that the time interval that had been set has expired. ‘T’ switches, timing mechanisms which activate a switch, are sometimes also called ‘T’ ….Mechanical ‘T’ use clockwork to measure time. Manual ‘T’ are typically set by turning a dial to the time interval desired; turning the dial stores energy in a mainspring to run the mechanism. They function similarly to a mechanical alarm clock; the energy in the mainspring causes a balance wheel to rotate back and forth. Each swing of the wheel releases the gear train to move forward by a small fixed amount, causing the dial to move steadily backward until it reaches zero when a lever arm strikes a bell. The mechanical kitchen timer was invented in 1926 called a fan fly that spins against air resistance; low-precision mechanical egg-timers are sometimes of this type…..The simplest and oldest type of mechanical timer is the hourglass – which is also known as “the glass of the hour” – in which a fixed amount of sand drains through a narrow opening from one chamber to another to measure a time interval…….’] 

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