Description : For accurately measuring and recording room temperature by means of pen on printed chart. Chart may be retained as record.Consists of bimetallic coil of non-rusting material exposed to atmosphere at end of ventilated metal case, and connected to the recording pen. As temperature rises and falls, coil unwinds or winds causing arm to move vertically across chart which is attached to metal drum with which is fitted a seven days winding clock. It completes one revolution in twenty four hours. Charts are divided horizontally into hours sub divisions of fifteen minutes and vertically into degrees covering range of 10 to 50 C. Top of case is hinged at one end and is fastened at opposite end by metal hasp. Case finished in grey color and has clear glass window for observing temperature chart. Supplied complete with 50 charts, bottle of special recording ink and instruction manual.
