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Acids Vapors Detector and Indicator

Acids Breakthrough Indicator with Auxiliary Filter Trap (BTI AFT)

Acids Filter Change Indicator with Auxiliary Filter Trap.

Item No. 651

Product Features
Minimum detectable limit: 4.ppm•min ammonia at 30 cm/sec face velocity
Color Change: Orange to red
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


Acids Indicator (BTI AFT) is filter change indicator with auxiliary filter trap designed to provide real time indication of the breakthrough of Acids. 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 651

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: 4ppm.min at 30 cm/sec face velocity
g Color change: Orange to red
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

Related Products
Acids BTI. Drum type filter change indicator
Acids BTIS. for ductless hood and fume extractor filters.

Useful Link

Acids Breakthrough Indicator (BTI AFT)

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