Digital Laboratory Timer
....
The unit activated by with an easy accessible button.
Activated by pressing the center of the front-side of the device.
By pressing the start button:
1. Produce an audible beep to indicate the countdown has started;
2. After 60 seconds a double audible beep produced indicating the 60 seconds’ period has passed and the visual indicator should cease indicting the unit has stopped counting down.
3. Provide red visual indicator informing the user that the device has been activated and is counting down (For example a flashing LED could indicate the unit is currently counting down.)
4. Pressing the button during an ongoing countdown reset the unit which means: stop the countdown and the visual indicator.
One audible signal (beep) at start and tow audible signal (Beep, Beep) at the end of the cycle.
Visual indication (red LED flashing) during operation and progress during the cycle. (Each second flashing, till the timer is stopped or when it completes the one minute count)
A provision included to ensure that the battery is not connected to the internal circuit at the time of delivery. This to avoid unwanted activation, leakage or accidental short-circuit of the unit.
The unit not make any sounds during the countdown (to avoid causing confusion for the person counting the breaths) .
Accuracy should be ± 0.1 second.
The unit battery powered and full batteries allow the unit to support 10 ,000 cycles of 60 seconds as a minimum.
The indicator LED integrated in the casing and not protruding.
Countdown timer.
Plastic outer casing.
Robust design.
Loud sound to indicating set time has elapsed.
Easily readable dial with large numbers.
Smooth surface which allows for easy cleaning.
Mechanical, spring driven.
Range: 0 - 60 minutes.
Size allows for easy transporting.
The product is a set of mechanical demonstration experiment, the time is measured by digital timer, air cushion guide is used for small gas source, and the products can be used in many kinds of mechanical experiments such as average speed, acceleration and elastic collision.
....
-lab-80258948.jpg "Electric Spark Timer (Multi Frequency)")
The product is composed of a host machine, hammer, edge clamp, recording tape, toner paper plate etc. Products using the power supply voltage: AC220V±22V, frequency: 50Hz±0.5Hz; product can output 20Hz, 50Hz, 100Hz high voltage pulse EDM, discharge time, the corresponding interval is 0.05s, 0.02s, 0.01s, the size of the output of the electric spark track adjustable. Quality: 50 RBI RBI continuous leak point, clear ideas, the diameter is not greater than 0.8mm. The main engine size is not less than 150 * 60 * 55mm, the size of the control point trace, the output frequency selector switch, the power switch and the indicator light are all on the main board, and can be adjusted according to the experiment.
....
It is a digital metrical instrument for high precision measurement (microsecond level) of intervals of time with storage function. It can be used for counting and timing.
....
It is used to measure time and count up in middle school physics teaching demonstration experiment and is common used with oblique trough orbit.
It adopts infrared transmitting and receiving device and IC internal device.
The instrument record the movement of the objects in the paper,and we can see the regulation of the movement of objects from the paper, then can simply calculate the distance, speed?acceleration of the objects.
Power Supply: AC 6V
