Three-Speed Hygrothermograph from Oakton Instruments

Three-Speed Hygrothermograph get maximum versatility from three rotation speeds.


Three,Speed,Hygrothermograph,Oakton,Instruments Quartz controlled drive gives consistant drum rotation speed even as batteries weaken
Three,Speed,Hygrothermograph,Oakton,Instruments Record temperature and humidity on 1, 7 or 32 day rotation
Lightweight and corrosion resistant construction for indoor or sheltered outdoor use

Maintain temperature and humidity records for buildings or controlled environment chambers. Use one-day rotation for detailed views of troubled areas, longer rotation times for routine records.


A flashing LED indicates drum is rotating. Two size C batteries provide up to six months of continuous operation. Features a battery test button.

Includes red and blue pens, batteries and one seven-day rotation chart.

Click below to download Acrobat (.pdf) file of:
Three-Speed Hygrothermograph product bulletin
Three-Speed Hygrothermograph manual

Humidity Range 5 to 90% RH
Humidity Accuracy ±3% from 10 to 90% RH;
±5% from 5 to 10% RH
Humidity Chart range 0 to 100% RH
Humidity Chart graduations 1% RH
Temperature Range -10 to 50°C / 14 to 122°F
Temperature Accuracy ±1°C / ±1.8°F
Temperature Chart graduations 1°C or 2 °F
Chart size 6.6"H x 11.5"L (16.8 cm H x 29.2 cm L)
Chart rotation 1 day (26 hr), 7 day (172 hr), or 32 day (810 hr)
Power spring wound
Dimensions 13.3" x 11.5" x 5.1" (33.8 x 29.2 x 13 cm)
Shipping weight 9 lbs (4 kg)

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