乙醛气体检测管92 CH3CHO
Acetaldehyde                         No.92

CH3CHO

 

Performance
Measuring Range		5 to10 ppm	10 to 300 ppm		300 to 750 ppm
Number of Pump Strokes		4	2		1
Correction Factor		0.5	1		2.5
Sampling Time		2 minutes per pump stroke
Detecting Limit		2 ppm (n=4)
Colour Change		Yellow → Red
Reaction Principle		3CH3CHO + (NH2OH)3H3PO4 → H3PO4 H3PO4 + Base → Phosphate
Coefficient of Variation		10% (for 10 to 100 ppm), 5% (for 100 to 300 ppm)
Shelf Life		2 Years
Corrections for temperature & humidity		Temperature correction is necessary
Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.
Possible coexisting substances and their interferences (NOTE)
Substance	Concentration		Interference	Change colour by itself to
Ammonia			-	No
Acrolein	3/5 times		+	Red
Acetone	2 times		+	Red
Methyl ethyl ketone	6 times		+	Red
MIBK	10 times		+	Red
Other substance measurable with this detector tube
Substance	Correction Factor		No.of pump strokes		Measuring Range
Diacetyl	by scale		3		25 to 1500 ppm
Calibration gas generation  Diffusion tube method
TLV-TWA	TLV-STEL		Explosive range
-	C 25 ppm		4 to 60%

 

Acetaldehyde                         No.92

CH3CHO

 

Performance
Measuring Range		5 to10 ppm	10 to 300 ppm		300 to 750 ppm
Number of Pump Strokes		4	2		1
Correction Factor		0.5	1		2.5
Sampling Time		2 minutes per pump stroke
Detecting Limit		2 ppm (n=4)
Colour Change		Yellow → Red
Reaction Principle		3CH3CHO + (NH2OH)3H3PO4 → H3PO4 H3PO4 + Base → Phosphate
Coefficient of Variation		10% (for 10 to 100 ppm), 5% (for 100 to 300 ppm)
Shelf Life		2 Years
Corrections for temperature & humidity		Temperature correction is necessary
Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.
Possible coexisting substances and their interferences (NOTE)
Substance	Concentration		Interference	Change colour by itself to
Ammonia			-	No
Acrolein	3/5 times		+	Red
Acetone	2 times		+	Red
Methyl ethyl ketone	6 times		+	Red
MIBK	10 times		+	Red
Other substance measurable with this detector tube
Substance	Correction Factor		No.of pump strokes		Measuring Range
Diacetyl	by scale		3		25 to 1500 ppm
Calibration gas generation  Diffusion tube method
TLV-TWA	TLV-STEL		Explosive range
-	C 25 ppm		4 to 60%