产品描述
The PHW-70 and PHW-71 Waterproof pH Meters have been developed for use in damp and dirty environments and are housed in chemically resistant polycarbonate cases waterproofed to IP54 standard. All inputs and outputs from the units are through waterproof compression glands and access to the instrument controls is via a hinged clear front panel. In addition, the Model PHW-71 has two independent alarm points each having its own relay and front panel LED indicator. The relay contacts are rated at 240V/2A. Both models measure pH and millivolts, and in the pH mode automatic temperature compensation is provided. The PHPM Series of panel mounted pH meters offer user selectable pH or millivolt readouts enabling them to be used for a wide variety of pH and redox measurements. The units are housed in rugged steel panel mounting DIN sized case and are installable from the front to allow fitting in limited access areas. To prevent accidental adjustment of the buffer and slope controls, they are recessed on the front panel. The instruments have automatic temperature compensation from 0 to 100°C. In addition, the PHPM-71 features a Hi/Lo alarm system that consists of two totally independent alarm points, each having its own relay and front panel LED indicator. The relay contacts are rated at 240 V/2 A.
