甲醛检测管NO.91P

甲醛检测管NO.91P

简单介绍
甲醛检测管NO. 91P，GASTEC甲醛检测管NO. 91P气体检测管，甲醛HCHO检测管NO. 91P,GASTEC甲醛检测管NO. 91P电泵用气体检测管检测范围0.02-1.44ppm。
甲醛检测管NO. 91P的详细介绍
甲醛检测管NO. 91P
甲醛检测管NO. 91P，GASTEC甲醛检测管NO. 91P气体检测管，甲醛HCHO检测管NO. 91P,GASTEC甲醛检测管NO. 91P电泵用气体检测管检测范围0.02-1.44ppm。
GASTEC为了满足用户在气体检测方面的需要，而开发出了电子自动采气泵。用传统的电子吸气泵几乎不能进行有效的采气，因为检测管里的填充试剂密度很高。而GASTEC开发的GSP电泵系列能提供强劲吸力，能满足特定的检测管的取样要求。电泵和检测管组成的新的检测系统能适用于作业环境的检测。

Formaldehyde

NO.91P

HCHO

Specifications

Calibration Range	0.02-0.4 ppm
Measuring range	0.02-1.44 ppm
Sampling (flow) Rate	200mL/min
Sampling Volume	6000mL, 2000mL
Sampling Time	30min, 10min.
Detecting Limit	0.01 ppm
Colour Change	Yellow → pink
Corrections for temperature/humidity	Temperature
Shelf life	1 year (in the refrigerator)
Accuracy	CV=5-10% (CV: Coefficient of variation = σ: standard deviation / mean value x 100)

Possibly coexisting substances and their interferences

Substance(s)

Interference

Colour change by itself

Ammonia	2 ppm (or less)	No	No
Nitrogen dioxide	1 ppm (or less)	No	No
Acetaldehyde		"+" error (higher reading)	produces pinkish discolouration
Acetone	0.3 ppm (or less)	No	Produces pinkish stain around tube opening (inlet)
Ethanol		No	No
Ethyl acetate		No	No
p-dichlorobenzene		No	No
Toluene		No	No
Scrubber 1 (black): removes acetone Scrubber 2 (purple): Ammonia and nitrogen dioxide are removed. The presence of ammonia causes the purple scrubber 2 to turn yellow. The presence of nitrogen dioxide causes scrubber 2 to turn a darker shade of purple

Calibration gas generation

Diffusion tube method (analysis: by absorptiometry, acetylacetone method)

Miscellaneous

Electric sampling pump
This detector tube is suited for measuring formaldehyde in indoor environments. The GSP-200 / GSP-300FT series automatic gas samplers (or comparable sampling devices/pumps) should always be used for optimal performance.
A deviation of +/-10% in the sampling flowrate (i.e. amount of air flowing through the tube at a given moment) or the sampling amount (total sampled amount of target substance) causes an average margin of error of approx. +/-10% (maximum +/-20%) in the indicated value.
Formaldehyde indoor concentration threshold: 0.08 ppm (mean value during 30 minutes)

TLV-TWA	TLV-STEL	Explosive range
-- --	C0.3ppm	7.0×73%