Wireless esophageal pH capsule for patients with gastroesophageal reflux disease: A multicenter clinical study

Figure 2 JSPH-1 pH capsule measurement system. A: The system includes a JSPH-1 delivery system, a receiver, a pH capsule, and a computer workstation; B: Prepackaged pH capsule incorporating both a delivery system and a pH capsule. The handle of the delivery system is separated from the capsule by triggering the activation knobs; C: The pH sensors (antimony pH electrode and reference electrode) are located on the distal tip of the capsule, and an internal battery, a transmitter, and a printed circuit board are contained within the capsule.