The 101D Water Level Draw Down Meter, has all of the same features as our Model 101P7 Water Level Meter, with the added benefit of the new Drawdown Mode, all in one unit. When in DrawDown mode the probe signals in air instead of water. This is a great feature if you need to know when levels in a well are dropping. The 101D Water Level DrawDown Meter also uses our Laser Marked Flat Tape, with standard lengths of 1000 ft (300m).
About Model 101D Water Level Draw Down Meter
The 101D Water Level DrawDown Meter has all of the same qualities as our well-known 101 P7 Water Level Meter, with the added feature of a drawdown mode. One simple toggle switches between static water level and drawdown measurements.
Water level mode allows accurate depth-to-water measurements in wells, boreholes, standpipes, and tanks. The drawdown function is used to monitor falling hydraulic heads during low flow sampling, pumping, and other aquifer/well tests. It also ensures a pump’s intake remains submerged during purging or well development.
Water Level DrawDown Meter 2 Products in 1
- Both static water level and drawdown modes in one meter
- One convenient toggle makes it easy to switch between the two functions
- Tape lengths up to 5000 ft. (1500 m)
Applications of Mode 101D Water Level DrawDown Meter
- Depth to water in wells, boreholes, standpipes and tanks
- Drawdown monitoring during: Low flow groundwater sampling; Well development and purging; Dewatering applications; Pumping, slug, hydraulic conductivity, step and other aquifer/well tests.
Operating Principles
The 101D Water Level DrawDown Meter uses a corrosion resistant stainless steel probe connected to clearly marked flat tape, fitted on a well-designed reel. It is powered by a standard 9 volt battery.
In water level mode, when the zero point on the probe enters water, an electronic circuit is completed, activating the buzzer and light. The depth to water is then read off the tape. In drawdown mode, the circuit is reversed— the buzzer and light are triggered when the probe is in air.
The battery test button can check the circuit in both water level and drawdown modes. The on/off sensitivity control allows the buzzer to be turned down in cascading water and ensures a clear signal in high and low conductivity conditions.
Source: www.solinst.com
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