Thermohygrograph Chart Pad: 311 Ornamental Instrument with the common theme of

with the common theme of using clean renewable energies

this instrument uses a hair-bundled device which expands and contracts according to water vapour present

with a ring for hanging

with gilt dial

Comes in handy and sturdy plastic 6

Thermohygrograph Chart Pad: 311 Ornamental Instrument with the common theme ofA year's supply of weekly charts in pad form, suitable for Sigma (by Sato) thermohygrographs set to measure 15 to 40 degrees C. Can also be used for Hismatsu or Kohari thermohygrographs. Humidity range of 0 to 100%. Pale orange coloured print. 307mm wide x 180 high, print area 292 x 180. If you have used our charts before, you will see in the bottom right hand corner 'Metco 311'; hopefully this makes it easy to re order the right ones!