The HOP tool kit has a small digital multimeter,
which can be used for all the electrical measurements you will need to make.
A small bulb thermometer is included in the
HOP Heat & Temperature kit.
Electronic Temperature Sensors:
Electronic sensors convert
temperature into something you can measure with a meter. As the temperature
changes, you get a change of voltage, current, or resistance, depending
on the sensor. In this lab, you get a chance to explore these different
This is a semiconductor that conducts electricity much better as it warms
up. As a result, you find that its resistance changes very quickly with
A diode lets current through in only one direction. When current is going
through it, there is a small voltage drop that depends on temperature.
Every junction between two different metals generates a voltage that depends
on temperature. This voltage is not large, but it keeps changing until the
Every wire has some resistance and it resistance will change with temperature.
Again, the change is not large, but keeps going until the wire melts.
This is a complex electronic circuit that has been constructed to pass a
current equal to its temperature. A bit pricey but accurate and convenient.