emin

Gastec 91LL Quick-measuring Detector tubes Formaldehyde HCHO (0.05-1ppm)

  • Manufacturer: Gastec
    Model: 91LL
    Origin: Japan
    • Request a Quotation Request a Quotation
  • Price (exclude tax) 940,000 VND
    Price (include tax) 1,034,000 VND
  •  Call for best price

    Hotline: (+84) 867820758

    Phone+84 (24)62923267

  • Quality Engagement
  • Easy change and return
  • Delivery Avaliable
  • Favorable payment

Manufacture: Gastec
Model: 91LL
Origin: Japan

Indicator: 0.05-1ppm
Measuring Range: 0.05-1ppm, Number of Pump Strokes 5
Sampling Time: 1.5 minute per pump stroke
Colour 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)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

manual tube

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)
Colour 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 colour by itself to
Ammonia   Yellow
(Unclear demarcation)
Nitrogen dioxide   No Pale pink
Aldehydes 1/3 time +
(Unclear demarcation)
Reddish brown
Ketones 1:1 +
(Unclear demarcation)
Reddish brown
Toluene 10 ppm No No
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
- C 0.3 ppm 7.0 to 73%


Apply your mail to get promotion information