In common use, a "Drucksonde" is a pressure probe / sensor.
A "Drucksensor", "Druckaufnehmer". Because, as I said, that's what "Sonde" means.
Look at the images that come up when you put the word in Google / Images, rather than these entries that get passed from one online dictionary to another.
"manometric capsule" is a very rare term, apparently it was used to describe a special device with a diaphragm that make sound waves visible, in the early history of the telephone.
"consistency gauge" is evidently a device that measures consistency, rather than pressure.
There is the device used for "Drucksondierung", measuring how firm the soil is on a construction site, this is the penetrometer used in the Cone Penetration Test. It is a special type of probe, a "Sonde", that measures the resistance at the tip and the friction at the sides, when the probe is pressed into the soil.