Titel
The Humigraf compared with other instruments

Thermometer, Hygrometer

No permanent data record

Shows no historical data – only current values

Cannot provide a permanent record for documentation purposes.

Drum recorder

Drum recorder has significantly greater physical dimensions typically 10 to  15 times the volume of the Humigraf.

Drum recorder is significantly heavier – typically four to eight times the weight of the Humigraf

The paper must be changed frequently – typically weekly or monthly

The recording mechanism is subject to wear, ink has to be refilled and the pens have to be changed regularly

The drum mechanism means that the pressure record of pressure variation is often printed on a curved, rather than a linear axis – which makes quick and accurate interpretation of the data difficult.

No digital display

No additional functions such as Alarm, display of Minimum and Maximum values..

Data logger

Laptop required

Display only visible if the laptop is running

Stored data unsuitable for use for legal / documentation purposes, as this can easily by manipulated by PC