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Mercury Breakthrough Indicator (BTI-AFT) with auxiliary filter trap detects mercury & mercury II compounds

Mercury Breakthrough Indicator with Auxiliary Filter Trap (BTI AFT)

Mercury Filter Change Indicator with Auxiliary Filter Trap. Detects mercury & mercury II compounds

Item No. 665

Product Features
Minimum detectable limit: 0.5mg/m3
Color Change: Off white to peach
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


Mercury Breakthrough Indicator (BTI-AFT) is filter change indicator with auxiliary filter trap designed to provide real time indication of the breakthrough of mercury and mercury II compounds. 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?

  • Remove bottom protective red plug from the bottom of the breakthrough indicator.
  • Screw in the male NPT threading at the bottom of the indicator into same female threading at the outlet of your filter.
  • 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 665

Product Specifications

a Weight: 118g (4.2oz)
b Dimensions: Part A: 89.9mm (3.5in), diameter 24.5mm (1.0in

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

c Inlet dimensions: ¾” MNPT
d Operating temperature: 4oC to 32oC (39oF to 89.6oF)
e Operating humidity: 5% RH to 85%RH
f Minimum detectable limit: 0.5mg/m3 at 30 cm/sec face velocity
g Color change: Off white to peach
h Storage temperature: 4oC to 25oC, (39oF to 77oF)
i Shelf life: 1 year at 4oC to 25oC, (39oF to 77oF)
j Service life: 1 year

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

Useful Link

Mercury Breakthrough Indicator (BTI-AFT)

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