氮氧化物NO+NO2气体测毒管175U NITROGEN OXIDES 0.5-30ppm

Tube 75U

1. PERFORMANCE
1） Measuring range ：1.0-30 ppm 0.5-15 ppm
Number of pump strokes 1/2（50ml） 1（100ml）
2） Sampling time ：1 minute/1 pump stroke
3） Detectable limit ：0.2 ppm（100ml）
4） Shelf life ：3 years（Necessary to store in a refrigerated place ; 0～10℃）
5） Operating temperature ：0～40℃
6） Reading ：Direct reading from the scale calibrated by 1 pump stroke
7） Colour change ：White→Pale purple
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：5％　RSD-high：5％
3. CHEMICAL REACTION
NO ; By reacting with an Oxidizer, NO2 is produced.
NO＋CrO3＋H2SO4→NO2
NO2＋3, 3’-Dimethylnaphthidine→Nitroso-compound
NO2 ; By reacting with 3, 3’-Dimethylnaphthidine, Nitroso-compound is produced.
NO2＋3, 3’-Dimethylnaphthidine→Nitroso-compound
4. CALIBRATION OF THE TUBE
NO ; STANDARD GAS CYLINDER METHOD
NO2 ; PERMEATION TUBE METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
0.5
1
2
3
5
10
15
ppm
100ml
GAS To pump
PRETREAT REAGENT
（Reddish brown）
Substance Interference ppm Coexistence
Chlorine Similar stain is produced. The accurecy of reading is not
affected.
Hydrogen chloride 〃〃
Sulphur dioxide Tafhfeec atecdc.uracy of reading is not 500 Lower readings are given.
Hydrogen sulphide 〃5 〃
Ozone 〃
Hexane 〃
Laughing gas 〃
（NOTE）
In case of 1 / 2 pump strokes, following formula is available for the actual concentration.
Actual concentration＝2×Reading value
175U NITROGEN OXIDES