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GAS91LL Formaldehyde Gastec Detector Tubes 0.05 - 1ppm


GAS91LL Formaldehyde

Why Buy Gastec Tubes from a1-cbiss?

Next Working Day Delivery - 95% of our Gastec Detector Tubes are held in refrigerated storage, so when ordering from a1-cbiss, you can expect fast delivery

Gastec Price Promise - We'll better any like for like competitors' offer. Provide us with a valid quote and we will beat it.

Low Price Gas Detection - Each pack of standard detector tubes is priced as low as £28.50


Excl. VAT: £28.50 Incl. VAT: £34.20
Excl. VAT: £28.50 Incl. VAT: £34.20

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Product Description


GAS91LL Formaldehyde Standard Gastec Detector Tubes


Gas detector tubes are glass tubes that are filled with a chemical reagent that absorbs and reacts with the target gas or vapour being measured. Gastec tubes do not contain hazardous substances


A colorimetric stain (a colour change) is created. For most tubes, the concentration is read directly from the pinpoint accurate measurement scale on each tube.


The Gastec detector tube system is comprised of a handheld Gastec air sampling pump and Gastec detector tubes


Shelf Life - a1-cbiss will never dispatch detector tubes with less than 3 months remaining before expiry. a1-cbiss employ a stock rotation policy of first in, first out. Specific shelf life requirements must be identified at the point of order placement (use the comment box in the checkout process). The expiry date is printed clearly on the front of the detector tube packet.


To view the product specification, download product datasheet from the Product Downloads section

Special Note 

Nitrogen Dioxide is trapped in the pre-treatment (white) layer. If the pre-treatment layer is entirely consumed, the detecting layer turns colour to pale pink at around zero point, but that does not affect the accuracy of measurement. 

Product Downloads

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