sphygmomanometer
There is no single instrument for either of these things
The correct spelling of the adjective, from measure, is measurable (weighable, quantifiable).
The correct spelling is thermometer (device to measure temperature).
The correct spelling is "ammeter" (electrical device to measure current).
The correct spelling is the plural measure kiloliters(thousands of liters).
That is the correct spelling of the (plural) word "bushels" (a farm crop measure).
The correct spelling is standard (usual, customary, or the norm; a base measure).
The correct spelling is "breathalyzer" (device to measure body alcohol, notably for drivers).
The correct spelling is "permanently" (for good, forever).
The correct spelling is "measure" (a quantitative value, or to assess a dimension, size, or quantity).
A theodolite is a precision measuring instrument used to measure angles in the horizontal or vertical plane. The instrument is mounted on a tripod and should be very precisely placed in order to make correct measurements.
The instrument used to measure humidity is called a hygrometer.