What are two ordinary thermometers mounted together on a single strip of material called?

The correct term for two ordinary thermometers mounted together on a single strip of material is a psychrometer. A psychrometer is an instrument that measures humidity by utilizing the principle of evaporative cooling. It typically consists of a dry bulb thermometer and a wet bulb thermometer. The dry bulb thermometer measures the air temperature, while the wet bulb thermometer is covered with a wet wick; as water evaporates from this wick, it cools the thermometer, resulting in a lower temperature reading.

The difference in readings between the two thermometers allows for the calculation of relative humidity based on the principles of psychrometry. This makes psychrometers valuable tools in fields like meteorology and HVAC (heating, ventilation, and air conditioning), where understanding humidity levels is crucial for comfort and conditions.

Other terms mentioned have different meanings or applications. Psychoanalyzer isn't a recognized scientific instrument related to temperature or humidity. A psychorometer seems to derive from a misunderstanding of the term "psychrometer," as it does not accurately refer to any specific instrument. A thermocouple is a device used for measuring temperature, but it operates on a different principle and is not designed in the manner described in the question.