Fixed handle whirling hygromweter
Designed to be rotated by hand to provide adequate and consistent ventilation of the bulbs the thermometer tubes used in these hygrometers have a blue coloured lo tox filling which has a similar accuracy and better legibility than mercury filling range 5 to 50c divisions 05 comes with canvas carry bag and wrist strap l x w x d 250 x 36 x 16mm