Gastec 9L 快速气体检测管NO2（0.5~125ppm）

制造商: Gastec
Model: 9L
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技术规格
制造商消息

Indicator:
Measuring Range:
+ 0.5 to 30 ppm, Number of Pump Strokes 2
+ 30 to 125 ppm, Number of Pump Strokes 1
Sampling Time: per pump stroke
Colour Change: White → Yellowish Orange
Reaction Principle: NO2 + o-Tolidine → Yellowish orange product
Coefficient of Variation: 10% (for 0.5 to 3 ppm), 5% (for 3 to 30 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Details

Performance

Measuring Range

0.5 to 30 ppm

30 to 125 ppm

Number of Pump Strokes

Correction Factor

By Scale

Sampling Time

30 seconds per pump stroke

Detecting Limit

0.1 ppm (n=2)

Colour Change

White → Yellowish Orange

Reaction Principle

NO2 + o-Tolidine → Yellowish orange product

Coefficient of Variation

10% (for 0.5 to 3 ppm), 5% (for 3 to 30 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 colour by itself to

Ammonia		No	No
Carbon monoxide		No	No
Carbon dioxide		No	No
Nitric oxide	50 ppm	Unclear demarcation	Pale red
Bromine, Chlorine	1/5 times	+	Yellowish orange
sulphur dioxide	10 ppm	(Bleaching)	No
Organic solvents		No	No