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Long-Cycle Hygrothermograph

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

  Record temperature and humidity on 1 or 3 month rotation
  Quartz-controlled strip chart drive consistently rotates chart drum even when batteries are weak

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.

Click below to download Acrobat (.pdf) file of:
Long-Cycle Hygrothermograph product bulletin
Long-Cycle 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 -20 to 50°C
TemperatureAccuracy ±1°C
TemperatureChart graduations 1°C
Chart size 6.6"H x 114" L (16.8 x 290 cm)-one month
6.6"H x 300"L (16.8 x 762 cm)-three months
Chart rotation 1 month (38 day max) or 3 month (100 day max)
Power one C battery (included)
Dimensions 13.3" x 11.5" x 5.1" (33.8 x 29.2 x 13 cm)
Shipping weight 9 lbs (4 kg)

click on image to enlarge

Model # Description Suggested List Price Qty  
WD-37250-20 Long cycle hygrothermograph $1469.00
WD-08368-75 Blue felt tip pens, 6/pack $33.50
WD-08368-80 Red felt tip pens, 6/pack $44.00
WD-37250-60 Chart paper roll, °C, 1 month rotation $41.00
WD-37250-62 Chart paper roll, °C, 3 month rotation $42.00

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OAKTON Instruments: setting the standard, again and again™
OAKTON Instruments P.O. Box 5136, Vernon Hills, Il USA 60061 info@4oakton.com