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Chart 93 is a Monday start chart printed in red
The RSI metal barograph arm is made out of stainless steel which helps to reduce corrosion but must be lightly wiped clean if ink does get onto it or when you replace the pen nib
Mechanical temperature minder lets you note changes in temperature
Paper size is 300mm x 173mm
Maintains proper operation during power outages via 9V battery back-up
TFA Small Hair Hygrometer Thermograph Charts Chart 93 is a MondayDescription Features Specification Unlike the spiral hygrometer, which indicates correctly within a certain range of the humidity scale, the synthetic hair hygrometer can be adjusted in such a way that it indicates reliably over the total humidity scale. This small synthetic hair hygrometer is, for that very reason, a high precision instrument. This brass instrument is less than 3 inches in diameter making it ideal for permanent wall mounting in key
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