Pneumatic means include a detector or an amplifier. The mechanical means of signal transmission include movement of a pen, indicator, float or cable. Electronic means include voltage, current, pulse duration, etc.

The most widely used metal is iron (usually as steel). The term corrosion is sometimes also applied to degradation of plastics, concrete and wood, but generally refers to metals.

If an anodic inhibitor is not present at a concentration level sufficient to block off all anodic sites, localised attack such as pitting corrosion can become a serious problem.

Ultrasonic level technology has been uncontested as standard for level and OCM applications in water industry.

Water process analyser consists of single and dual Channels with a one step, push button calibration which displays DO and temperature for each channel.

By removal of oxygen from water systems in pH range 6.5-8.5 one of components required for corrosion would be absent.

The corroding piece of metal is described as a ?mixed electrode? since simultaneous anodic and cathodic reactions are proceeding on its surface.

The most common type of read out devices is indicators, recorders and totalizer on panels of computer screens. The display is placed locally, close to equipment site or at a central operating room for whole family.

This process called cathodic protection and can only be applied if re is a suitable conducting medium such as earth or water through which a 9 [CORROSION&PROTECTION/BM] current can flow.

There are three types are time control systems present in wastewater engineering. They are digital, analog and automatic control systems.