Study Evaluating the Relevance and Reliability of Gastrointestinal Temperature Measurements From a New Device (E-celsius)

Inclusion Criteria: * Healthy volunteers male or female (18 to 59 years inclusive) * Signed the informed consent. * Affiliated to the social security scheme * French speaker Exclusion Criteria: * Subject having started or stopped during the 15 days preceding the inclusion visit one of the following treatments: antidepressants, anxiolytics, antiparkinsonian agents, neuroleptics. * Subject having taken over the previous 7 days a drug to treat irritable bowel syndrome (antispasmodic, etc ...) or constipation (laxative) * Subject with known food allergies * Subject undergoing surgery for colon surgery * Subject with an organic occlusion * Subject with known abnormal liver or renal function * Subject participating in another clinical study within a month before the inclusion visit. * A person with a bodyweight under 40 kg * Any person with obstruction (known or suspected) of the gastrointestinal tract, including people with diverticula (folds) intestinal or intestinal inflammation known. * People with a BMI greater than or equal to 30. * People under guardianship * People who have or had known swallowing disorders * People who have to undergo an MRI or to be subjected to a strong magnetic field programmed during the transit of the capsule * Persons equipped with a pacemaker * People with diabetes or with diabetic history * People with heave * The detainees * Pregnant women * People with nasal septum deviation * People with against-indications to the placement of an esophageal tube: people who carry chronic esophageal pathology (eg, gastroesophageal reflux treated, hiatal hernia,)