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首页>产品中心>日本光明北川式气体检测管>气体快速检测管>171SA甲醛HCHO气体检测管171SA FORMALDEHYDE 20-1500ppm

甲醛HCHO气体检测管171SA FORMALDEHYDE 20-1500ppm

简要描述:

甲醛HCHO气体检测管171SA FORMALDEHYDE 20-1500ppm,甲醛是一种无色,有强烈刺激型气味的气体。易溶于水、醇和醚。甲醛在常温下是气态,通常以水溶液形式出现。易溶于水和乙醇,35~40%的甲醛水溶液叫做福尔马林。甲醛分子中有醛基生缩聚反应,得到酚醛树脂(电木)。甲醛是一种重要的有机原料,主要用于塑料工业(如制酚醛树脂、脲醛塑料—电玉)、合成纤维(如合成维尼纶—聚乙烯醇缩甲醛)、皮革工业、医药、染料等。

更新时间:2017-07-15

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甲醛HCHO气体检测管171SA FORMALDEHYDE 20-1500ppm

甲醛HCHO气体检测管171SA FORMALDEHYDE 20-1500ppm

Tube No.171SA

1. PERFORMANCE
1) Measuring range :20-1,500 ppm
Number of pump strokes 1(100ml)
2) Sampling time :1.5 minutes /1 pump stroke
3) Detectable limit :5 ppm
4) Shelf life :2 years(Necessary to store in a refrigerated place ; 0~10℃)
5) Operating temperature :0~40℃
6) Temperature compensation :Necessary(See "TEMPERATURE CORRECTION TABLE")
7) Reading :Direct reading from the scale calibrated by 1 pump stroke
8) Colour change :Yellow→Pink
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:10% RSD-high:10%
3. CHEMICAL REACTION
By reacting with Hydroxylamine phosphate, Phosphoric acid is liberated and PH indicator is discoloured.
HCHO+(NH2OH)3・H3PO4→H3PO4+HCH=NOH+H2O
4. CALIBRATION OF THE TUBE
COLOURIMETRY METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
􀀀􀀀􀀀 􀀀
GAS To pump
DETECTOR TUBE
(white)
DEHUMIDIFIER TUBE
1500
1000
800
600
400
200
100
50
20
ppm
171SA FORMALDEHYDE
Substance Interference ppm Coexistence
Other Aldehydes Similar stain is produced. Higher readings are given.
Ketones 〃〃
Formal-
Methanol dcoenhcy.de Lower readings are given.
×1/2
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 0℃ 10℃ 20℃ 25℃ 30℃ 35℃ 40℃
(ppm) (32°F) (50°F) (68°F) (77°F) (86°F) (95°F) (104°F)
1,500 - - 1,500 900 690 530 410
1,000 - - 1,000 700 550 430 340
800 - 1,300 800 600 490 390 300
600 1,200 900 600 490 410 330 250
400 600 520 400 350 290 230 180
200 240 230 200 180 150 130 100
130 100 100 100 90 80 70 60
50 50 50 50 45 40 35 30
20 20 20 20 20 20 20 20

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