Portable Digital Chlorine Meter with Large LCD DisplayThis compact, battery operated meter is easily portable for field or lab use. Follows EPA method 330. 5 for waste water, and standard method 4500 CI G for drinking water. This compact chlorine meter features push button automatic 3 point calibration, hold and min max recall. It's perfect for testing swimming pools, municipal water, food and beverage water or other aqueous solutions where fluid clarity is important. The meter measures the free and