The Oakton 08369-70 minidrum hygrothermograph is a benchtop unit that has a seven-day (172-hour) rotation for humidity and temperature recordings, a quartz-controlled drive for constant drum rotation, and an aged bimetallic strip temperature sensor for accurate temperature readings. Hygrothermographs are used to measure and document humidity and temperature over time in computer rooms, greenhouses, food storage rooms, warehouses, museums, and in quality control (QC) laboratories, education and research lab testing environments.

This hygrothermograph’s quartz-controlled drive system allows a steady chart speed, even when the battery or spring-wound system begins to run down, which keeps the chart running for seven days. An aged bimetallic strip temperature sensor provides accurate pressure readings. A human hair bundle relative humidity (RH) sensor provides ambient humidity measurements with accurate linearity, repeatability, and temperature compensation. This unit has a protective acrylic cover that locks into place for security. Its cover is lightweight and corrosion-resistant, and a sturdy metal base provides a range of use in indoor and sheltered outdoor environments. The minidrum hygrothermograph comes with one sheet of pre-attached chart paper, one red cartridge pen, and one blue cartridge pen. 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. The 08369-70 is factory pre-set for a seven-day rotation. The response time is fifteen minutes for 45% of reading.

Specifications

 

H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.

Hygrothermographs are used to measure temperature and humidity for various applications such as education, general purpose QC labs and research lab testing, and for biological process monitoring.

Oakton Instruments manufactures an array of scientific instruments for research, industrial, and educational uses. Since 1991, Oakton has distributed a wide variety of instruments such as meters, electrodes, and transmitters. Oakton is based in Vernon Hills, IL, and has facilities in Europe, Asia, and China.

What’s in the Box?

• 08369-70 minidrum hygrothermograph
• Blue pen
• Red pen
• 7-day rotation chart paper