Calibration Range: 0.01 -0.20 ppm
Measuring Range: 0.01-0.80 ppm
Sampling (flow) Rate: 200mL/min
Sampling Volume: 6000mL, 2000mL
Sampling Time: 30min, 10min.
Colour Change: Pale yellow → Pink
Nr. of tests: 10
Automatic Gas Sampler: GSP-300FT-2
|Calibration Range||(0.01)-0.20 ppm|
|Measuring range||0.01-0.80 ppm|
|Sampling (flow) Rate||200mL/min|
|Sampling Volume||6000mL, 2000mL|
|Sampling Time||30min, 10min.|
|Detecting Limit||0.005 ppm|
|Colour Change||Pale yellow → Pink|
|Corrections for temperature/humidity||Temperature|
|Shelf life||1 year (in the refrigerator)|
(CV: Coefficient of variation = σ: standard deviation / mean value x 100)
|Substance(s)||Interference||Colour change by itself|
|Ammonia||max. 2 ppm||No||No|
|Nitrogen dioxide||max. 1 ppm||No||No|
|produces pinkish discolouration|
|Acetone||max. 0.3 ppm||No||Produces pinkish stain around tube opening (inlet)|
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)|
|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)
|-- --||C0.3ppm(2014)||7.0 to 73%|