Abstract: A portable, anchored sensor module for collecting fresh water environmental data over a range of depths, is supported relative to a buoy having a power supply and control circuitry. A depth control housing supports the underwater sensor module. The depth control housing can be controlled as to its buoyancy for supporting the sensor module at selected depths and collecting data at such depths. The control circuitry includes capabilities for transmitting data on suitable frequencies, such as those for a cellular phone, and has a computer with memory for storing the sensor signal for remote call up. Periodically the sensor information may be transmitted to a remote station used for control. The remote station also can control the depth from which the sensors are taking data.