Thermometer Mercury / Spirit (Red Alcohol) for Laboratory / Clinical
1. Length: 300mm
1. Mercury M -10 to 110oC, 1oC:
2. Mercury Superior MS -10 to 110oC, 1oC
3. Mercury Superior MS -10 to 110oC, 0.5oC
4. Alcohol A -10 to 110oC, 1oC
5. Alcohol Superior AS -10 to 110oC, 1oC
6. Alcohol A -10 to 110oC, 0.5oC
7. Mercury M -10 to 360oC, 2oC
Advantages and Disadvantages of Mercury Thermometers
- It is a good conductor of heat and hence, can measure even high temperatures.
- It gives results quickly – has a fast response time.
- It expands linearly and less than alcohol and any other liquid.
- It is more durable than an alcohol thermometer because mercury does not evaporate easily.
- It is smaller in size compared to alcohol one.
- Mercury does not wet the wall of the thermometer, which means that results can be highly accurate.
- It is highly toxic for living beings and the environment if the bulb breaks and mercury leaks out.
- Mercury is difficult to clean, and it can contaminate the surface on which it leaked.
- It cannot measure cold temperatures.
- It has low thermal co-efficient.
Advantages and Disadvantages of Alcohol Thermometers
- It is suitable to measure low temperatures because of its freezing point is low.
- It is less toxic than mercury thermometer and hence high on safety factor for human and environment.
- It has a greater value of temperature coefficient of expansion than a mercury thermometer.
- It is less expensive than a mercury thermometer.
- It is less durable because alcohol evaporates faster than mercury.
- It cannot measure high temperature because of a low boiling point.
- It wets the walls of the thermometer, which can adversely impact the accuracy of readings.