We carry out resource tests on water wells. For the tests we need to record the speed at which the water drops within a borehole at a certain flow rate. We would look to attach a pressure transducer just above a submersible pump at around 180m, with a data logger at the surface to record the continuous change in water pressure, and therefore determine the water depth. We would also need a flow rate monitor with continuous display, so we could record the amount of water being pumped out of the hole. Ideally we would like to plug both of these into a laptop that would work best. We would need a submersible pressure transducer capable of measuring over 0 to 20kg/cm2 and small enough to fit down a borehole, say with a diameter of 3cm or less. We would also require up to 200m of cabling to take the signal from the transducer down the hole to the logger at the surface.
We would suggest the MultiCon CMC-99 data logger installed inside a transport case and powered by an internal rechargeable battery. The transport case has the connections on the side to connect sensors and also recharge the device.
The MultiCon CMC-99 can display both flow and level / pressure. It will data log the instruments and also display them on the screen. You can apply a whole host of maths to the device to display the results. You can download the data either by RJ45 ethernet or by the USB flash drive on the front of the device. Data analysis software is also provided for installing on a PC.
For the submersible pressure transducer we would suggest the ATM/N submersible pressure transducer with 200m cable which has a diameter of 24mm, and this can be connected to a Peli case which incorporates the CMC-99 data logger with colour touchscreen display.
If you only need a few hours of monitoring at a time then you can use the internal battery version so you simply plug in the submersible level sensor via the connector at the side and away you go. If you need more power for longer periods then another peli case can be supplied with batteries fitted for longer use. You can also connect to the device via an ethernet connector on the side of the case to link up to a laptop computer.