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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.3H


Measuring Range

0.2 to 1%

1 to 16%

16 to 32%

Number of Pump Strokes

5 - 2



Correction Factor

1/5 to 1/2



Sampling Time

1 minute per pump stroke

Detecting Limit

0.05% (n=5)

Color Change

Purple Yellow

Reaction Principle

Ammonia neutralizes acids to discolor the indicator to yellow.

Coefficient of Variation 10% (for 1 to 4 %), 5% (for 6 to 16 %)
Shelf Life 3 Years
Corrections for
temperature & humidity
Store the tubes at cool and dark place.

Possible coexisting substances and their interferences (NOTE)




Change color by itself



Plus error

Discolor to yellow stain

Carbon dioxide

1% or higher

Minus error

No discoloration

Amines other than aromatic amines


Plus error

Discolor to yellow stain

Other substance measurable with this detector tube


Correction Factor

Pump Strokes

Measuring Range




1.2 to 19.2%

Calibration gas generation High pressure gas cylinder method

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

Range 0.2-32%

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