美國PTC 674F微型點溫檢查表面溫度計

本儀器是用來測量表面溫度，特別是在空間有限的情況下。雙金屬傳感器可與被測表面緊密接觸，它使得溫度計具有快速的響應時間。 其小尺寸可以測量熱鋼板的一部分或者整個表面。 惰性指針（最大指針）是通過后面的磁鐵控制的，指針所在位置表示在一定時期內達到最高或者最低溫度。這會保留該讀數，即使震動或者誤操作都不會讓它重置。 

675系列可用于烘箱，空氣管道，和其他裝置的熱量泄漏。 這些溫度計也可以用來測量散熱片，熱交換器，實驗室爐，滾筒，熱板的溫度。 675系列也可以用于測試電子部件的溫度。 可以通過采用一些這樣的溫度計，然后繪制讀數來構建一個區域的等溫線。

This instrument is designed to measure surface temperatures, especially where space is limited. The bimetal sensor comes in close contact with the surface to be measured, which provides the thermometer with a fast response time. The small size makes for minimum "heat-stealing" from a part or surface. A lazy hand (max pointer) is held by a magnetic clutch and indicates the highest or lowest temperature reached in a given period. It will hold this reading despite the vibrations and jarring of normal use and can be reset indefinitely. 

The 675 Series can be used for determining heat leakage from ovens, hot air ducts, and other installations. These thermometers can also be used for measuring the temperature of heat sinks, heat exchangers, laboratory heaters, platens, and hot plates. The 675 Series can be used for testing the temperature of electronic parts. An isotherm of an area can be constructed by employing several of these thermometers and then plotting the readings.