... analyzing & measuring the content & concentration of elements (K, Na, Li, Ca, Ba). It can be widely applied to agriculture ( ... and be able to detect K, Na, Li, Ca, Ba 5 elements. With K, Na, Li, Ca, Ba five filters, which ... 0-100ppm;Na: 0-100ppm;Li: 0-100ppm;Ca: 0-1000ppm;K: 0-100ppm;Na: 0-100ppm;Li: 0-100ppm ... Na: 0-100ppm;Li: 0-100ppm;K: 0-100ppm;Na: 0-100ppm;Ca: 0-1000ppm;K: 0-100ppm;Na: 0-100ppm; ...