ترمومتر بی متال TE 100 فولاد ضد زنگ برنجی برند پکنز

• Bi-Metals are made of two different metal sheet layers and a spiral form is given ,as the metals expansion rates differ from each other , due to these factors it spins upwards around its axis by heat.By a transmission wire this movement it is transmitted to the pointer.
• Used where no high accuracy is needed.
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