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Ammonia  (NH3)
Item Item Details
(Price is for domestic US market only)
Ammonia  (NH3)
Item Name:
Ammonia (NH3)
Item #:

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Ammonia NH3 NO.3LA


Measuring Range

2.5 to 5ppm

5 to 100 ppm

100 to 200ppm

Number of Pump Strokes




Correction Factor




Sampling Time

30 seconds per pump stroke

Detecting Limit

0.5ppm (n=2)

Color Change

Purple Yellow

Reaction Principle

Ammonia react with phosphoric acid to change
the color of pH indicator to yellow.

Coefficient of Variation 10% (for 5 to 20 ppm), 5% (for 20 to 100 ppm)
Shelf Life 3 Years
Corrections for
temperature & humidity
Temperature correction is necessary
Store the tubes at cool and dark place.

Possible coexisting substances and their interferences (NOTE)




Change color by itself

Carbon dioxide


Minus error(20%)




Plus error

Produce yellow discoloration



Plus error

Discolors at 5 ppm(Yellow)

Calibration gas generation Permeation tube method

TLV-TWA TLV-STEL Explosive range
25ppm 35ppm 15 to 28%

Range 2.5-200

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