Abstract: The invention relates to a device (1) for detecting a pressure in a mammal's stomach, particularly in a rumen of a ruminant, the device (1) comprising at least the following components: a sensing volume (12), a pressure sensor (9) configured and arranged to detect a gas pressure in the sensing volume (12), an elastic membrane (5) forming a deformable wall portion of the sensing volume (12), wherein the elastic membrane (5) is configured and arranged to deform in response to a pressure difference over the elastic membrane (5), wherein the elastic membrane (5) comprises a gas-permeable portion allowing a pressure difference over the elastic membrane (5) to equalize.

Abstract: The invention relates to a device for permanently detecting the gastric pressure, the gastric temperature, the gastric motility and the movement of a livestock animal, in particular a ruminant, comprising a, for example, bolus-shaped body (14), said body (14) comprising the following components: a pressure sensor (9), a telemetric device (9) for transmitting measuring values, and a gas-tight interior space (12), wherein a wall of the gas-tight interior space (12) comprises in some regions an elastic material which is deformable by the gastric pressure of a livestock animal, and wherein the pressure sensor (9) is designed to detect the pressure in the gas-tight interior space (12). According to the invention, said device is designed such that it permanently remains in the stomach of the livestock animal when it is applied to the livestock animal.

Abstract: The invention relates to a device for permanently detecting the gastric pressure, the gastric temperature, the gastric motility and the movement of a livestock animal, in particular a ruminant, comprising a, for example, bolus-shaped body (14), said body (14) comprising the following components: a pressure sensor (9), a telemetric device (9) for transmitting measuring values, and a gas-tight interior space (12), wherein a wall of the gas-tight interior space (12) comprises in some regions an elastic material which is deformable by the gastric pressure of a livestock animal, and wherein the pressure sensor (9) is designed to detect the pressure in the gas-tight interior space (12). According to the invention, said device is designed such that it permanently remains in the stomach of the livestock animal when it is applied to the livestock animal.