What is the name of those thermometers which do not use mercury ?

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks for the name of thermometers that do not use mercury.

2. **Identifying Conventional Thermometers**: Conventional thermometers, such as glass thermometers, typically use mercury to measure temperature.

3. **Exploring Alternatives**: To find thermometers that do not use mercury, we need to consider modern alternatives.

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