Oakton Three-Speed, Battery-Operated Hygrothermograph

Representative image only.
Oakton Item # EW-37250-00
No more inaccurate readings—accurate to 3%
  • Record for 1, 7, or 32 days
  • Maintains constant rotation even when batteries are weak
  • 1 year warranty

$585.55USD / Each
$836.50USD / Each

$257.00 - $327.00USD / Each

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Specifications & Description

  • Chart TypeDrum
  • Chart Speed24 hour; 7 day, and 32 days (user selectable)
  • Chart Width (in)6.625
  • Chart Length (in)11.5
  • Max Temperature (° F)122
  • Min Temperature (° F)14
  • Max Temperature (° C)50
  • Min Temperature (° C)-10
  • Temperature Accuracy±1.8°F (±1.0°C)
  • Max Humidity (RH%)95
  • Min Humidity (RH%)5
  • Humidity Accuracy±3% from 10 to 90%; ±5% from 5 to 9%
  • Width (in)13 1/4
  • Height (in)11 1/2
  • Depth (in)5 37/64
  • Width (cm)33.7
  • Height (cm)29.2
  • Depth (cm)14.2
  • Battery TypeC battery (2)
  • Battery Life6 months
  • DescriptionThree-Speed, Battery-Operated Hygrothermograph
  • Warranty1 year
1 Year WarrantyConformite Europeenne


two felt-tipped pens (one blue and one red), one 7-day sheet of chart paper, and two C batteries.

Two C batteries.

Key Features

  • Record for 1, 7, or 32 days
  • Maintains constant rotation even when batteries are weak
  • 1 year warranty

More About this Item

Feature a human hair bundle humidity sensor and an aged bimetallic strip temperature sensor. Response time is 15 minutes for 45% of reading.
Three-Speed, Battery-Operated Hygrothermograph
Select 1-, 7-, or 32-day operation with the flip of a switch. A flashing LED indicates that the unit is operational. Uses two C batteries (included) for up to 6 months of continuous operation. Test battery condition with the press of a button. The quartz-controlled drive mechanism consistently rotates chart drum even when batteries are weak.
Exposure to RH levels above 90% can cause a decrease of about 7-10% RH in readings over the entire range due to temporary elongation of the hair bundle. When exposed to humidity levels below 80%, hair bundle will return to normal in about three weeks.






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