6. Names of parts and principles of operation
A. T190 Bimetal Thermometer
B. Bimetal
Operation principle: Bimetal composed of two metal of different expansion ratio
in temperature change is used. The temperature sensing part (⑥ in Fig. A)
has spiral bimetal (Fig. B) which will expand to indicate any temperature change.
There are T and L types that are operating in the same principle.
Bimetal used in thermometer is shown in Fig. B.
No.
PART NAME
DESCRIPTION
1
Cover
Stainless Steel
2
Window
Glass
3
Case
Stainless Steel
4
Zero Adjustment
Stainless Steel
5
Gauge Connection
Stainless Steel
7
Element
Bimetal
6
Stem or Bulb
Stainless Steel
2
5
6
7
6
4
1
3
