Energy-efficient data acquisition by adaptive sampling for wireless sensor networks

A pressurized or forced circulation electrolysis cell comprising a cell housing containing at least one pair of electrodes which is a cathode and an anode, a current collector and an ion exchange membrane having a surface area of at least about 40 ft2 having the improvement which comprises an electrically conductive, hydraulically permeable resilient mattress substantially coplanar with and contacting on one side the current collector and coplanar with and contacting on the other side an electrode. The mattress comprises at least six non-aligned layers of woven and crimped metal fibers having a resiliency product of greater than 100 (inches)2/psi according to the formula:RP=10,000xNSxCHwherein RP represents the resiliency product in (inches)2/psi, NS is the negative slope of the mattress height versus compressive load of the mattress, and CH is the compressive height over the range that the mattress will be compressed in millimeters.