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Humidity Indicators

Poly Lam Products supplies an exceptional variety of high quality humidity indication products, from the originators and worlds leading producers of humidity indicator cards.

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 and meet Military specification I-8835. 

A chemical-type color change relative humidity indicator, that was inexpensive and not easily damaged, proved to be the solution to the problem of indicating dangerous humidity conditions in the storage of critical military inventories.

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 in the Pacific and the tropics. The use of desiccant and humidity indicators solved this problem.

  MS20003-2

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, clear 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.

The current Military Standard, MS 20003, dated 5 JUN 63, is approved by all Governmental Agencies, the Department of Defense, and NATO for use in Method II packaging. The MS20003-2 meets this standard and is fully reversible.

MS20003-3 This card is used where space may be a problem. It is identical in design to the MS2003-2, which is 2" x 3", except it is approximately half its size, making the MS20003-3 ideal for small barrier applications.

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