HOBO* Bluetooth Low Energy Water Level Data Logger, with titanium sensor, Integrated barometric pressure sensor enables direct water level readout, logger and sensor add 0.39 meters to the length of the cable, Size: 9 m
Determining the gravitational constant, with the gravitation torsion balance after Cavendish- Measuring the excursion with a light pointer, Required but not included: Laser light pointer
Digital Counter For event counting, a fixed counting period can be programmed in a range from 0.1 ms to 99999 s. Counter events (e.g. start or stop) can either be triggered by a signal to the input sockets or manually via switches. The unit includes a plug-in power supply.
Nexpensive, compact counter for measuring milliseconds. Each count is started and stopped by a signal at the input sockets. The device is automatically reset to zero each time it is restarted.