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

WD-37250-10 Two-Speed Spring Wound Hygrothermograph by Oakton

Spring wound- no batteries required!

Made of corrosion- resistant acrylic for indoor or sheltered outdoor use. Spring winding keeps chart running for eight days. Even when the motor begins to run down, a steady chart speed is maintained. Includes one 1-day gear and one 7-day gear, two felt-tipped pens (red and blue), and one 7-day rotation chart.

• Includes gear for 1 day rotation, gear for 7 day rotation, red felt-tipped pen, blue felt-tipped pen, roll of 7-day paper, C battery (1)
• Record temperature and humidity on 1 or 7 day rotation

WD-37250-20 Long-Cycle Hygrothermograph by Oakton

Record up to 3 months of humidity and temperature readings on one chart!

Unit features a corrosion-resistant acrylic plastic case with tinted cover for easy viewing. Operates on one C battery for up to six months continuous use. Built-in battery test indicates battery condition with a button press. Unit includes red and blue pens, battery, and one roll of 1-month chart paper.

• Includes red felt-tipped pen, blue felt-tipped pen, roll of 1-month paper, C battery (1)
• Quartz controlled drive gives consistant drum rotation speed even as batteries weaken
• Record temperature and humidity on 1 or 3 month rotation
• Quartz-controlled strip chart drive consistently rotates chart drum even when batteries are weak