When doing work for gas, oil, or even power companies, a lot of underground measurements are required and the conditions can get extreme in a very short amount of time. The environment of underground work can be stressful on both the workers and, especially, the equipment. When relying on a downhole pressure sensor , it needs to have longevity, repeatability and stability. The output should not change under constant pressure and temperature. It should be able to repeat the same out conditions when input conditions change. In other words the extreme heat and pressure of the deep underground measurements should not affect the reliability of the sensor.
A pressure transducer is used, most often, to measure water and gas pressures below ground. Most underground work can be extremely taxing on workers and often fatal, however, with the specialized transducers they are able to stand above ground to take measurements.
A temperature probe is mostly used for areas in which water is present. By measuring the temperature of water, works are able to find out how deep it is and help navigate their surrounding in that way. Although these probes seem very rugged, they are pretty delicate to certain stimuli including thermally induced noise which can be found in hot climates deep underground, especially present in both the sands and oil industries. This is the cause of failure for many probes so special consideration of this is needed when purchasing probe for these areas of underground atmospheres.