Thermometers
1. The structure of thin film thermocouple
2. Solid expansion thermometer
3. Outline drawing of thermocouple compensation wire
4. Thermocouple thermometer
5. The structure of thermal resistance
2 Principles of pressure gauges
1. Bourdon tube pressure gauge
2. Electric contact pressure gauge
3. Capacitive pressure sensor
4. Capsule pressure sensor
5. Pressure thermometer
6. Strain gauge pressure sensor
3 principle of flow meter
1. Target flowmeter
2. Orifice flowmeter
3. Vertical waist wheel flowmeter
4. Nozzle flow
5. Positive displacement flow meter
6. Oval gear flowmeter
7. Venturi flowmeter
8. Turbine flowmeter
9. Rotor flowmeter
4 Principles of Level Meter
1. Differential pressure level gauge A
2. Differential pressure level gauge B
3. Differential pressure level gauge C
4. The principle of ultrasonic measurement of liquid level
5. Capacitance level gauge
5 valve principle
1. Thin film actuator
2. Piston type actuator with valve positioner
3. Butterfly valve
4. Diaphragm valve
5. Piston actuator
6. Angle valve
7. Pneumatic film regulating valve
8. Pneumatic piston actuator
9. Three-way valve
10. Cam flex valve
11. Straight through single seat valve
12. Straight through double seat valve
6 control principle
1. Cascade uniform control
2. Nitrogen sealing split control
3. Boiler control
4. Heating furnace cascade
5. Heating furnace temperature measurement
6. Simple and uniform control
7. Uniform control
8. Material transfer
9. Liquid level control
10. The principle of measuring molten metal with an intrusive thermocouple
