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Oakton Instruments Three Speed Drum Hygrothermograph

  • 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
  • Human hair humidity element for superior accuracy
  • Bimetallic strip temperature element

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.

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 Two "C" Batteries
Dimensions 13.3"W x 11.5"H x 5.9"D (33.8 x 29.2 x 13 cm)
Shipping weight 9 lbs (4 kg)

Ordering Information

Model # Description
WD-37250-00 Three-Speed, battery operated hygrothermograph
WD-08368-11 Chart paper, °F, 1 day rotation, 100/pack
WD-08368-21 Chart paper, °F, 7 day rotation, 100/pack
WD-08368-31 Chart paper, °C, 1 day rotation, 100/pack
WD-08368-41 Chart paper, °C, 7 day rotation, 100/pack
WD-08368-23 Chart paper, °F, 32 day rotation, 25/pack
WD-08368-43 Chart paper, °C, 32 day rotation, 25/pack
WD-08368-75 Blue felt tip pens, 6/pack
WD-08368-80 Red felt tip pens, 6/pack

Contact Us!

John Sherman Agencies Ltd.
1641 Venables Street
Vancouver, British Columbia, Canada
V5L 2H1

Phone: 604-254-9622
Fax: 604-254-3123