Metcheck Pen Arm - T Shape 165mm Hygrograph Charts Each pack contains 200 charts

Each pack contains 200 charts which is four years’ worth of chart record papers

The scale also provides readings in Fahrenheit

blanking plug

at the wet bulb temperature

Metcheck Pen Arm - T Shape 165mm Hygrograph Charts Each pack contains 200 chartsDescription Features Specification Replacement stainless steel Short & Mason barograph arm. Ideal for those looking to replace their existing instrument arm due to wear and tear. Overall arm length can shorten with time due to the repeat changing of barograph nibs or pens. Barograph ink can be slightly corrosive so remember to gently wipe the end of your instrument arm when changing the nib or adding ink to extend the use of your barometer. Overall