humidity INDICATOR cardsspecifications

Today more than ever, humidity indicator cards are being used in an increasing number of applications including :Military, Atomic Energy Commission, Aerospace, Sensitive Electronics, and Industrial manufacturing. Humidity Indicator Cards are an accurate, reversible method of monitoring desiccant activity levels in a controlled atmosphere.

They provide several inexpensive alternatives to costly and sensitive equipment without the need for re-calibration .A chemical-type color change relative humidity indicator, that was inexpensive and not easily damaged, proved to be the solution to the problem of indication dangerous humidity conditions in the storage.

The need for protective packaging was brought to a head during World War II When moisture damage caused military supplies to deteriorate at the high relative humidity’s in the Pacific and the tropics. The use of desiccant and humidity indicators solved this problem. After the War, the color change chemical indicator was developed by Humidial Corporation, who used blotting paper as the vehicle. Using cobalt chloride solutions, with additives, Humidial developed a wide range of humidity indications.

The range is as low as 8% and as high as 95%.The humidity color change indicators and plugs allow visual inspection of the condition of a sealed package by readily detecting any change in the water vapor ratio (relative humidity by means of an easy to read color change element)The indicator will change from blue to pink - a blue color means safe and pink color means unsafe. The sensitive indicating element of the plugs has long term calibration and accuracy within 5% of the relative humidity, and a large, clearer viewing window for ease in reading either straight or from the side. Installation is quite simple and only takes a few seconds to install the plug into the storage container.

Specification