• 122DL ảnh 1

Ống phát hiện thụ động Ethanol Toluene C6H5CH3 Gastec 122DL (2 ~ 500 ppm)

THÔNG SỐ SẢN PHẨM: Ống phát hiện thụ động Ethanol Toluene C6H5CH3 Gastec 122DL (2 ~ 500 ppm)

Hãng sản xuất: Gastec
Model: 122DL
Xuất xứ: Nhật Bản

Vạch chỉ thị: 20 ~ 500 ppm
Thang đo: 2 ~ 500 ppm
Thời gian lấy mẫu: 1 đến 10 giờ
Chuyển đổi màu: Trắng sang nâu
Hệ số chuyển đổi: 10% (20 ~ 500 ppm-hr)
Số ống trong hộp: 10


Measuring Range2 to 500 ppm
Sampling Hours1 to 10 hours
Detecting Limit1 ppm (10 hours)
Colour ChangeWhite → Brown
Reaction PrincipleToluene react with formaldehyde to form condensation polymer, which is brown in colour.
Coefficient of Variation10% (for 20 to 500 ppm-hr)
Shelf Life2 Years
Corrections for temperature & humidityUnnecessary
Store the tubes at cool and dark place.
Possible coexisting substances and their interferences (NOTE)
SubstanceConcentrationInterferenceChange colour by itself to
Aromatic hydrocarbons +Brown
Alcohols, Ketones, Esters 30ppm NoNo
Other substance measurable with this detector tube
SubstanceCorrection FactorSampling TimeMeasuring Range
XyleneFactor: 1.71 to 103.4 to 850 ppm
Ethyl benzeneFactor: 1.41 to 102.8 to 700 ppm
CumeneFactor: 1.71 to 103.4 to 850 ppm
BenzeneFactor: 1.21 to 102.4 to 600 ppm
StyleneFactor: 13 1 to 1026 to 6500 ppm
Calibration gas generationDiffusion tube method
TLV-TWATLV-STELExplosive range
20 ppm(2014)-1.4 to 6.7%