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Formaldehyde Breakthrough Indicator Auxiliary-Filter-Trap. Reliable and cost effect for protection from toxic gases and vapors.

Formaldehyde Breakthrough Indicator with Auxiliary Filter Trap (BTI AFT)

Formaldehyde Filter Change Indicator with Auxiliary Filter Trap.

Item No. 659

Product Features
Minimum detectable limit:
Color Change: Brown to dark blue
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


Formaldehyde Breakthrough Indicator Auxiliary-Filter-Trap

Formaldehyde Breakthrough Indicator (BTI-AFT) is filter change indicator with auxiliary filter trap designed to provide real time indication of the breakthrough of formaldehyde 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 →
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PN 659

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 at 30 cm/sec face velocity
gColor change:Brown to dark blue
hStorage temperature:4oC to 25oC, (39oF to 77oF)
iShelf life:1 year at 4oC to 25oC, (39oF to 77oF)
jService life:1 year

Formaldehyde Breakthrough Indicator Auxiliary-Filter-Trap

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