河南省鑫屬實業(yè)有限公司

甲醛氣體檢知管91LL

甲醛氣體檢知管91LL Formaldehyde，Measuring Range 0.05 to 1.0 ppm Number of Pump Strokes 5 Correction Factor 1 Sampling Time 1.5 minutes per pump stroke Detecting Limit 0.03 ppm (n=5)甲醛氣體檢知管價格甲醛氣體檢知管91LL Formaldehyde的詳細介紹甲醛氣體檢知管91LL Formaldehyde Formaldehyde No.91LLHCHO Performance Measuring Range 0.05 to 1.0 ppm Number of Pump Strokes 5 Correction Factor 1 Sampling Time 1.5 minutes per pump stroke Detecting Limit 0.03 ppm (n=5) Color Change Yellowish Brown → Reddish Brown Reaction Principle 3HCHO + (NH2OH)3H3PO4 → H3PO4 H3PO4 + Base → Phosphate Coefficient of Variation 10% (for 0.05 to 0.3 ppm), 5% (for 0.5 to 1.0 ppm) Shelf Life 1 Year 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 Ammonia - Minus error Faint dull yellow color to whole layer Nitrogen dioxide - No effect Pale pink discoloration around zero Aldehydes 1/3 time Plus error (Unclear demarcation) Faint reddish brown to whole layer Ketones 1:1 Plus error (Unclear demarcation) Faint reddish brown to whole layer Toluene 10ppm No effect No discoloration 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%

河南省鑫屬實業(yè)有限公司

周娜