An ammeter is a measuring instrument used to measure the flow of electric current in a circuit. Electric currents are measured in amperes, hence the name. The word ammeter is commonly misspelled or mispronounced as ampmeter by some.The earliest design is the D'Arsonval galvanometer or moving coil ammeter. It uses magnetic deflection, where current passing through a coil causes the coil to move in a magnetic field. The voltage drop across the coil is kept to a minimum to minimize resistance across the ammeter in any circuit into which the it is inserted.To measure larger currents, a resistor called a shunt is placed in parallel with the meter. Most of the current flows through the shunt, and only a small fraction flows through the meter. This allows the meter to measure large currents. Traditionally, the meter used with a shunt has a full-scale deflection (FSD) of 50mV, so shunts are typically designed to produce a voltage drop of 50mV when carrying their full rated current.

Ammonia (NH3) monitors is a microprocessor-based analyzer. It is used as an ammonia ion-selective probe. This compact, self-contained analyzer provides effective measurements of ammonia in sewage treatment, rivers, potable water treatment, boiler feed water and industrial effluents. It is a ammonia measurement device. It achieves better than 1 ppb detection of ammonia in ambient air. It advances detection limit and measurement speed to enable real-time monitoring of airborne ammonia in lithography areas.

Ammonia Flares are of two general types. They are emergency and process. Operation of the flare only occurs in the event of refrigeration failure or power failure.

Ammonia handling equipments include unloading stations, storage tanks & accessories, ammonia feed forward pumps, ammonia process control unit, ammonia distribution manifolds, and ammonia injection grid.

Ammonia injection grid offers a plurality of air foils across a flue conveying flue gas. It is located in the flue leading to the SCR catalyst at a point far enough upstream to ensure optimal flue gas and reagent distribution across section of the catalyst. The primary design parameters for the ammonia injection grid involves total ammonia delivery capacity, header velocity, nozzle area concentration and injection velocity.

High Level controllers monitor, regulate, and control liquid or solid levels in a process. There are three basic types of control functions that high-level controllers can use. The limit control works by interrupting power through a load circuit when the level exceeds or falls below the limit set point. A limit controller can protect equipment and people when it is correctly installed with its own power supply, power lines, switch and sensor.

Ammonia plants are used to produce ammonia. The primary purpose of the ammonia plants is to supply liquid ammonia to the di-ammonium phosphate (DAP) plant, for the production of DAP/MAP fertilizer. These plants comprise of several units that include natural gas compression and desulfurization, reforming, waste heat recovery and boilers, CO shift conversion, CO2 removal and methanation, syngas compression, ammonia synthesis, refrigeration, ammonia and hydrogen recovery, ammonia storage, and shipping facilities.