Recording Thermograph
Model No. HV-EXP262
;For accurately measuring and recordingroom temperature by means of pen on printed chart. Chart may be retained asrecord. Consists of bimetallic coil of non-rusting material exposed toatmosphere at end of a ventilated metal case, andconnected to recording pen. As temperature rises and falls,coli unwinds or winds, causing arm to move vertically acrosschart which Is attached to metal drum with which is fitted aseven days winding clock. It completes one revolutiontwenty four hours. Charts are divided horizontally into hourssub divisions of fifteen minutes and vertically Into degreesconverting range of 10. to 50.C. Top of case is hinged at oneend and is fastened at opposite end by metal hasp. Case isfinished in pleasing colour and has clear glass window forobservlnd temperature chart. Furnished with 50 charts,bottle of special recording ink and directions for use.
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