河南省鑫屬實(shí)業(yè)有限公司

甲醛檢測(cè)管91M

甲醛檢測(cè)管91M HCHO Formaldehyde，Measuring Range 8 to 20ppm 20 to 2000ppm 2000 to 6400ppm Number of Pump Strokes 2 1 1/2 Correction Factor 0.4 1 3.2 Sampling，甲醛檢測(cè)管價(jià)格甲醛檢測(cè)管91M HCHO Formaldehyde的詳細(xì)介紹甲醛檢測(cè)管91M HCHO Formaldehyde Formaldehyde No.91MHCHO Performance Measuring Range 8 to 20ppm 20 to 2000ppm 2000 to 6400ppm Number of Pump Strokes 2 1 1/2 Correction Factor 0.4 1 3.2 Sampling Time 1.5 minutes per pump stroke Detecting Limit 4 ppm (n=2) Color Change Yellow → Red Reaction Principle 3HCHO + (NH2OH)3H3PO4 → H3PO4 H3PO4 + Base → Phosphate Coefficient of Variation 10% (for 8 to 200 ppm), 5% (for 500 to 2000 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 color by itself Acrolein 5 times Plus error Produces red stain at 20 ppm Acetaldehyde 1/6 time Plus error Produces red stain at 3 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