Not all enviornmental testing instrumentation has to be high tech electronincs, in fact our Level Tapes series of dip meter
s is inexpensive, easy to use and ships on a next day basis. If you need occassional water level measurements this is a great tool.
Please select a journal that you would like to view papers from during the time period that you have selected.
Int J Epidemiol
Trans R Soc Trop Med Hyg