Due to excellent physical and chemical properties,graphite materials have become a research hotspot in the field of sensors in recent years.A probe device based on rectangular cantilever beam,temperature control box and hygrometer are designed. The performance of strain and temperature sensor based on graphite sheet is tested.The linearity and sensitivity coefficients of strain measurement are 0.978 and 0.00196Ω/με,respectively.The linearity and sensitivity coefficients of temperature measurement are 0. 945 and 0. 05267Ω/℃,respectively.At the same time,the influence of humidity on the performance of graphite sheet sensor is also studied and it is found that there is a sharp threshold effect of humidity on the conductivity of graphite sheet.When different strains are applied,the critical humidity value of electrical conductivity mutation is about 70％.The results of this study show that if graphite sheets was utilized for strain measurements,it is necessary to setteled in an environment with humidity below 70％.
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