河南省鑫屬實(shí)業(yè)有限公司

甲醛檢測(cè)管91

甲醛檢測(cè)管91 Formaldehyde HCHO，Measuring Range 2 to 20ppm 20 to 50ppm 50 to 100ppm Number of Pump Strokes 2 1 1/2 Correction Factor 1 2.5 5 Sampling Time 1 minute per，甲醛檢測(cè)管價(jià)格甲醛檢測(cè)管91 Formaldehyde HCHO的詳細(xì)介紹甲醛檢測(cè)管91 Formaldehyde HCHO Formaldehyde No.91 HCHO Performance Measuring Range 2 to 20ppm 20 to 50ppm 50 to 100ppm Number of Pump Strokes 2 1 1/2 Correction Factor 1 2.5 5 Sampling Time 1 minute per pump stroke Detecting Limit 0.5 ppm (n=2) Color Change White → Brown Reaction Principle HCHO + C6H4(CH3)2 + H2S2O7 → Condensation Polymer Coefficient of Variation 15% (for 2 to 6 ppm), 10% (for 6 to 20 ppm) Shelf Life 3 Years Corrections for temperature & humidity Unnecessary Store the tubes at cool and dark place. Possible coexisting substances and their interferences (NOTE) Substance Concentration Interference Change color by itself Aldehydes 1/2 time Plus error Produce brown stain Esters, Ethers 1000 ppm Plus error No discoloration Ketones 1000 ppm Plus error No discoloration Styrene 500 ppm Plus error Yellow at 500 ppm Other substance measurable with this detector tube Calibration gas generation Diffusion tube method TLV-TWA TLV-STEL Explosive range - C 0.3ppm 7.0 to 73%

河南省鑫屬實(shí)業(yè)有限公司

周娜