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ENO Scientific Well Watch 670
The Well Watch 670 is a simple to use self-contained acoustic ranging instrument designed specifically to find the distance through a closed pipe (well casing or sounding tube as small as 1/2”) from one closed end to the to the other.
The Well Watch works by sending a low frequency sound pulse into the pipe, then measuring the time it takes for the echo to return from the opposite end, which could be a plug or water surface. The distance is calculated using the sound speed and the time.
The low frequency sound can follow the pipe around corners and in any direction up/down or horizontally. It can be used to measure any closed pipe, straight or crooked with a constant diameter.
The Well Watch 670 consists of a control unit and a probe which are connected by a latching hinge. The control unit contains the driver electronics, processor, display, and keypad, while the probe contains a speaker, a microphone and a threaded spout to connect to the test pipe. When the unit powers, it immediately begins sending sound pulses into the well and attempts to characterise the well. After a few seconds, the depth is calculated and output for the user.