A computerized pneumatic device designed to measure tension-sensory threshold and motility in the gastrointestinal tract during neurogastroenterology assessment. It maintains a preselected pressure in an intragastric bag (balloon) of a dedicated catheter that is inserted into the gastrointestinal tract (e.g., oesophagus, stomach, intestines, rectum) and registers the pressure changes of the air pumped into the balloon at a predetermined speed (internal pressure data), and simultaneously measures the volume of air that has been used. The collected data can be used in the diagnosis of gastrointestinal disorders such as dysphagia, nausea, vomiting, anorexia, bulimia, or constipation.