	Quartz controlled drive gives consistant drum rotation speed even as batteries weaken
	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

HumidityRange	5 to 90% RH
HumidityAccuracy	±3% from 10 to 90% RH; ±5% from 5 to 10% RH
HumidityChart range	0 to 100% RH
HumidityChart graduations	1% RH
TemperatureRange	-10 to 50°C / 14 to 122°F
TemperatureAccuracy	±1°C / ±1.8°F
TemperatureChart 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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