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Aromatic Diisocyanate detector

Aromatic Diisocyanates Breakthrough Indicator with Auxiliary Filter Trap (BTI AFT)

Aromatic Diisocyanates Filter Change Indicator with Auxiliary Filter Trap.

Item No. 656

Product Features
Minimum detectable limit: Aromatic Diisocyanates,
Color Change: off white to brownish pink
Dimensions: Part A: 89.9mm (3.5in), diameter 24.5mm (1.0in)
Part B: 41mm (1.6in), diameter 81mm (3.2in)
Service life: 1 year


Aromatic Diisocyanates Breakthrough Indicator (BTI AFT) is filter change indicator with auxiliary filter trap designed to provide real time indication of the breakthrough of aromatic diisocyanates. Indicator is equipped with auxiliary filter trap to ensure no gases or vapors escape to the outside environment while the indicator changing color.

How the BTI AFT works?

When filter is consumed, toxic gases and vapors breakthrough it. The contaminated air then enters the BTI AFT and chemically reacts with the indicating sensor. Producing vivid color change, alerting the user to change the filter.

How to use the BTI AFT?
  1. Remove bottom protective red plug from the bottom of the breakthrough indicator.
  2. Screw in the male NPT threading at the bottom of the indicator into same female threading at the outlet of your filter.
  3. Replace filter when the breakthrough indicator changes Color.

why is it essential to use filter change indicator & how to install it into your filter →
Learn more

PN 656

Product Specifications

aWeight:118g (4.2oz)
bDimensions:Part A: 89.9mm (3.5in), diameter 24.5mm (1.0in

Part B: 41mm (1.6in), diameter 81mm (3.2in)

cInlet dimensions:¾” MNPT
dOperating temperature:4oC to 32oC (39oF to 89.6oF)
eOperating humidity:5% RH to 85%RH
fMinimum detectable limit:Aromatic Diisocyanates, at 30 cm/sec face velocity
gColor change:Aromatic Diisocyanates, off white to brownish pink
hStorage temperature:4oC to 25oC, (39oF to 77oF)
iShelf life:1 year at 4oC to 25oC, (39oF to 77oF)
jService life:1 year

Related Products
Organic Vapors BTI. Drum type filter change indicator
Aromatic Diisocyanates BTIS. for ductless hood and fume extractor filters.

Useful Link

Aromatic Diisocyanates Breakthrough Indicator (BTI AFT)