Portable hand-held COD meter designed to provide measurements for the most critical water quality parameter.
手持式COD仪表用于测试最重要的水质参数。
2
Portable hand-held dissolved oxygen meter designed to provide measurements for the most critical water quality parameter.
便携式手持溶解氧仪设计提供了最重要的水质参数的测量。
3
Often a handheld integrating sound level meter such as the Model 30 would be mounted on a tripod at a boundary position and, for example, a 15 minute measurement made.