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Ammonia Analyzer AT-2000

Ammonia Analyzer AT-2000

Eco-friendly and easy-to-use ammonia meter “Quick Ammonia”


Coulometric titration method ammonia analyzer (NH4-N) Model AT-2000 is a unique and unparalleled ammonia meter based on the coulometric titration technology for the water & environmental water market. It can measure ammonia (NH4-N) swiftly, accurately and easily without any special skills.

Main Specifications
Measurement principle : coulometric titration method

Measurement items : ammonium-nitrogen (NH4-N) ammonium ion (NH4+)

Measurement range : 0.00 – 2.00mg/L (sample volume 10.0mL)
0.00 – 20.00mg/L (sample volume 1.0mL)
0.00 – 200.0mg/L (sample volume 0.1mL)
Precision : < CV3%

Data storage : 50 data points

Data output : RS-232C x 1 port
Power supply : AC90V – 240V, 50/60Hz, 50VA
Dimension & weight : 310W x 270D x 250H mm, 5Kg (without printer)

Standard Accessories
AT-2000 main unit, plug adapter, dedicated printer, Printer mount, electrolyte (reagent) 500mL x
2, plastic beakers (50mL x 2, 100mL x 1), RS-232C cable

Main Features
􀂄 Specially developed environmental-minded reagent 
􀂄 Wide measurement range from low to high end
􀂄 Accurate measurements not affected by turbidity or color of the sample
􀂄 Short measurement time, typically 1 minute (in the case of the range 0 – 20mg/L)
􀂄 Calibration is not required
􀂄 Very small volume of the sample is required (0.1mL, 1mL or 10mL)
􀂄 Long life and stain resistant electrode compared to the ion selective electrode, also quite low
influence by temperature change
􀂄 Only one type of reagent (dedicated electrolyte) used to allow low running cost
􀂄 Measurement data can be read out to PC or printer through RS-232C port.

Result data of the standard solution measurement in mg/ml
 Conc.(mg/ml)  Display (mg/ml)
 0.2  0.21
 1  1.02
 2  2.02
 10  9.94
 20  19.9
 
Average of 3 repetitions is shown in the table above for each concentration. Average CV was 0.78%.

Note the easy steps for a sample measurement (for a range 0 – 20 mg/L)

Fill 10mL electrolyte, 10mL distilled water and 1mL of the sample into the beaker provided
Set the beaker to the beaker guide of the AT-2000
Press “MEAS” button to start the measurement
Measurement automatically starts and stops to display the results!

Measurement principle (coulometric titration method)


The AT-2000 adopts the coulometric titration method for measurement. This method electrochemically
determines the endpoint of the reaction between the measuring object (ammonia and ammonium)
and the component generated by electrolysis of the reagent that rapidly and quantitatively reacts
with the measuring object. The concentration of the measuring object component can be calculated
from the electric charge (current x time) consumed until the end point of the reaction is reached.
In the electrolytic process (electrolyte added containing potassium bromide), BrO- is generated at the
anode and reacts with ammonia in the sample quantitatively and instantaneously. At the end of
the reaction, unreacted BrO- begins to appear in the sample solution. This reaction end point is detected
with the BrO- electrode to stop the electrolysis. Finally the concentration of ammonia-nitrogen (mg/L) is
calculated from the consumed electric charge.
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Chlorine Checker CD-2000

Chlorine Checker CD-2000

Chlorine Checker Model CD-2000

In the past, the amount of chlorine to be added to water was determined by measurement of residual chlorine in water. JM Science introduces the CD-2000 which measures the amount of chlorine consumed by ammonia, iron, manganese and other organic materials and providing advance information as “Chlorine Demand” in raw water. A corresponding amount of chlorine is added for clean water with a consistent level of residual chlorine. The unit may be used for daily control and research purposes.

The CD-2000 measures chlorine demand in drinking water, waste water, rivers, lakes, dams, wells and sea water quickly and easily. It has accurate measurement without interference by turbidity or color of the water and allows determination of volume of chlorine to be added (correct volume of chlorine can be determined in advance).



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