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Ammonia  (NH3)
Item Item Details
(Price is for domestic US market only)
Ammonia  (NH3)
Item Name:
Ammonia (NH3)
Item #:
GAS-3M

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Ammonia NH3 NO.3M


Performance

Measuring Range

10 to 50 ppm

50 to 500 ppm

500 to 1000 ppm

Number of Pump Strokes

2 to 5

1

1/2

Correction Factor

1/2 to 1/5

1

2

Sampling Time

45 seconds per pump stroke

Detecting Limit

2 ppm (n=5)

Color Change

Purple Yellow

Reaction Principle

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

Coefficient of Variation 5% (for 50 to 500 ppm)
Shelf Life 3 Years
Corrections for
temperature & humidity
Unnecessary
Store the tubes in dark and cool place.


Possible coexisting substances and their interferences (NOTE)

Substance

Concentration

Interference

Change color by itself

Diamines

1/8

Plus error

Produce yellow stain

Monoamines

1/15

Plus error

Produce yellow stain

Carbon dioxide

1%

Minus error

No discoloration


Other substance measurable with this detector tube

Substance

CorrectionFactor

Pump Strokes

Measuring Range

Trimethylamine

0.5

1

25 to 250 ppm


Calibration gas generation Permeation tube method


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

Range 10-1000


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