Ketterer Thermo/hygrograph 1/ 7/ 31 day
An ideal instrument for showing the continuous course of temperature and humidity in a room by graphic means.
The resulting graphs can be useful in evaluating the promonant conditions of organ locations.
| Duration | 1/7/31days selectable |
| Cylinder drive | strong quarz motor |
| Measuring element | temperature: bimetal strip rel. humidity: durotherm |
| Power source | Battery (duration ca 1 year) |
| Representation | Graph paper and two long-life graphic-styli |
| Size | 280 x 138 x 260 mm |
| Accessories | 100 sheets graph paper 2 long-life writing styli and battery |
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