MI-1 : Moisture Indicator

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Product Overview

This low cost moisture indicator will quickly display the quality of process air being used by the ozone generator. These handy air quality indicators are used between air dryers, or oxygen concentrators, and the ozone generator to give an inexpensive visual indication of the quality of the process air entering your ozone generator. Description of color indications below.

As all of these contaminations in the air may destroy Air Dyers, Oxygen Concentrators, Ozone Generators, and other sensitive equipment this indicator can have a variety of uses.

  • Bright Blue - Air is below -40-deg C Dew Point
  • Light Blue to Purple - Air is above -40-deg C Dew Point
  • White - Air is at or above 0-deg C Dew Point
  • Black - Contaminated by high Ozone levels
  • Yellow - Contaminated by Oil Vapors
  • Red/Pink - Contaminated by Acid Vapors
  • Green - Contaminated by Acid Vapors


  • Indicates moisture in process air
  • Easy to install
  • Low cost
  • Changes from blue to pink when air is wet

More Information

Ozone/Oxygen Connections 1/4-inch Barb Connections
Weight 0.50 lbs (0.23 kg)
Electrical 120 VAC 60 Hz
Dimensions Length: 6 in (15.2 cm) Diameter: 1 in (2.5 cm)
Warranty 1 Years
Temperature Range 32 to 212°F (0.0 to 100°C)
Air Dryer Type Desiccant - Heat Regenerative
Air Dew Point -40°F (-40°C)
Max Flow Rate LPM 60 LPM