$750 - $1000, Humidity Hygrothermographs, Oakton

WD-37250-00 Three-Speed Battery-Operated Hygrothermograph by Oakton

Get maximum versatility from three rotation speeds

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 felt-tipped pen, blue felt-tipped pen, roll of 7-day paper, C battery (2)
• 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