Custom Breakthrough Indicators (BTI)

(Filter Replacement Indicators)

Our custom and OEM indicators are validated for complete customer satisfaction. With our own on-site fully equipped chemical laboratory and machine shop, and highly experienced chemists and engineering team, we are able to assist in any product development or R&D project.

Custom Filters Change Indicators
Safety and Industrial Hygiene Products

Breakthrough Indicators for Carbon Adsorbers and Ductless Hood filters

We manufacture custom breakthrough indicators (BTI), saturation indicators, for a wide variety of toxic chemical vapors in the air. These BTI are most suited for use with carbon absorbers and carbon scrubbers as well as ductless hood filters or any sorbent media.

Features:


  • Irreversible color change
  • Real-time and direct-read
  • Detection sensitivity at or below OSHA permissible exposure limits
  • Accurate and reproducible (overall accuracy, better than ±25% at the 95% confidence level)
  • Selective to target chemical
  • Stabilized for long service and shelf life

List of available breakthrough indicator applications

 

Chemical Name

Minimum detectable limit (ppm•hr)

Color change

Cross interferences

1

Acids

0.05

Yellow to red

Bases impair the indicator

2

Aromatic Amines

0.015

orange to maroon

See attached document

3

Aromatic diisocyanates

0.005

White to red

None known

4

Bases

0.5

Yellow to blue

Acids impair the indicator

5

Carbon monoxide

8

Brown to black

Acetylene, Ethylene, H2S and H2

6

Halogens

0.2

yellow to pink

HCl impair the indicator

7

Formaldehyde

0.4

brown to blue

See attached document

8

Aliphatic & Aromatic Hydrazines

0.005

orange to maroon

Aromatic amines

9

Hydrogen sulfide

0.3

Blue to brown

None known

10

Mercury

0.3mg/m3•hr

Off white to orange

Hydrides

11

Phosgene and chloroformates

0.015

Yellow to red

Benzoyl chloride, cyanuric chloride and carbonyl bromide

Breakthrough Indicators for Waste Container Filters

These saturation and breakthrough indicators are most suited for waste container filters used in hplc and dry cleaning applications. It can also be used in any application where a filter is connected to a waste container.

Features:


  • Irreversible color change

  • Real-time and direct-read

  • Stabilized for longer service and shelf life


 

Indicator Name

Chemicals detected

Performance Specification

1

HPLC Solvents

Acetone, Acetonitrile, Chloroform, Ethanol, Ethyl acetate, Methanol, Methylene chloride and Tetrahydrofuran (THF)

See attached document

2

Hydrocarbons

Aliphatic hydrocarbons (e.g. hexane), Aromatic hydrocarbons (e.g. benzene and xylenes), Gasoline, Halogenated hydrocarbons (e.g. Chloroform and Methylene chloride) and Naphtha

See attached document

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