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Halogens Filter Change Indicator (BTI-AFT) with auxiliary filter trap

Halogens Breakthrough Indicator with Auxiliary Filter Trap (BTI AFT)

Halogens Filter Change Indicator with Auxiliary Filter Trap. Detects bromine chlorine & iodine.

Item No. 660

Product Features
Minimum detectable limit:
Color Change: Yellow to red or purple
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


Halogens Breakthrough Indicator (BTI-AFT) is filter change indicator with auxiliary filter trap designed to provide real time indication of the breakthrough of bromine, chlorine, and iodine. 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 660

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:Yellow to red or purple
hStorage temperature:4oC to 25oC, (39oF to 77oF)
iShelf life:1 year at 4oC to 25oC, (39oF to 77oF)
jService life:1 year

Halogens BTI. Drum type filter change indicator Useful Link
Halogens BTIS. for ductless hood and fume extractor filters.

Useful Link

Halogens Breakthrough Indicator (BTI-AFT)