Residual chlorine test paper 15-30 seconds 100 sheets 5148 1 roll (100 sheets)

Residual chlorine concentration can be easily checked. After immersing the sample in the solution, the color change can be checked within 15 to 30 seconds. Measurement range and scale (ppm): 0-25-50-100-200-300 Quantity: 1 bottle (100 sheets) Measurement time: 15 to 30 seconds Color sample displayed on the container body