Aquarium thermometer, electronic thermometer and mercury thermometer which more appropriate?

To give the fish a comfortable places, now many people abandoned the more mini fish tank, choose the variety of forms, and even can simulate a small ecosystem of aquatic animals. But whether fish tank or aquarium, ensure the temperature is very important thing, but at this time we will have a little entanglements, what kind of thermometer is the choice? General electronic thermometer and mercury thermometer, when the choice that the two, which one is better? Let's carefully analyze, what kind of thermometer is more suitable for the aquarium? Mercury thermometer thermometer is very common, its temperature material is mercury, mercury is very stable, enclosed within the thermometer, its thermal expansion coefficient is constant. So the accuracy of the mercury thermometer is better, but we all know that if the mercury thermometer rupture is also more serious, the consequences of because of the dangers of mercury is larger. Electronic thermometer is the thermal sensor for temperature of thermoelectric emfs. Due to the thermal sensor drift problem and the problem of cold junction compensation electronic thermometer, so the level is not high accuracy may be slightly worse. Although the accuracy is poorer, but electronic thermometer is safe, not big accidents like mercury thermometer, a threat to the safety. Small make up advice is, therefore, be on the safe side, or use the electronic thermometer is better, but home can have a mercury thermometer, used for electronic thermometer calibration.