Abstract: A monitoring system for monitoring pressure in a tire of a trailer includes an active sensor, a receiver and an indicator. The active sensor is positioned at a first location and is operable to sense the pressure. The receiver is positioned at a second location remote from the first location and within proximity to the sensor. The receiver is operable to generate a signal indicative of the pressure and includes an inductor, and an amplifier having a feedback path. The inductor is positioned relative to the receiver to create an electromagnetically coupling between the inductors such that feedback from the coupling is one of either a substantially zero feedback and a negative feedback. The indicator outside of a vehicle is in communication with the receiver to provide a warning of a low pressure to the user.

Abstract: A monitoring system for monitoring a first parameter includes an active sensor, a receiver and an indicator. The active sensor is positioned at a first location and is operable to sense the first parameter. The receiver is positioned at a second location remote from the first location and within proximity to the sensor. The receiver is operable to generate a signal indicative of the first parameter and includes a first inductor, a second inductor and an amplifier having a feedback path. The first inductor and the second inductor are positioned relative to one another to create an electromagnetically coupling between the inductors such that feedback from the coupling is one of either a substantially zero feedback and a negative feedback. The indicator is in communication with the receiver to provide the first parameter to the user. This parameter may include a tire pressure of a tire on a vehicle.

Abstract: A fluid sensing system for monitoring a fluid parameter within a fluid container includes a fluid sensor and a fluid receiver. The fluid sensor is positioned at a first location and is operable to sense the fluid parameter. The fluid receiver is positioned at a second location remote from the first location and within proximity to the fluid sensor. The fluid receiver includes an amplifier having a feedback path. The amplifier is in a waiting non-oscillating mode when the fluid sensor is not electromagnetically coupled to the fluid receiver and in an active oscillating mode when the fluid sensor is electromagnetically coupled to the fluid receiver, such that feedback in the feedback path is one of either a substantially zero feedback and a negative feedback when the amplifier is a waiting non-oscillating mode and said feedback path is a positive feedback when said amplifier is in an active oscillating mode.

Abstract: A monitoring system for monitoring a first parameter includes a sensor, a receiver and an indicator. The sensor is positioned at a first location and is operable to sense the first parameter. The receiver is positioned at a second location remote from the first location and within proximity to the sensor. The receiver is operable to generate a signal indicative of the first parameter and includes a first inductor, a second inductor and an amplifier having a feedback path. The first inductor and the second inductor are positioned relative to one another to create an electromagnetically coupling between the inductors such that feedback from the coupling is one of either a substantially zero feedback and a negative feedback. The indicator is in communication with the receiver to provide the first parameter to the user. This parameter may include a tire pressure of a tire on a vehicle.

Abstract: A system is provided for monitoring tire pressure which includes a sensor mounted within a tire that triggers a train of pulses when tire pressure reaches a level outside predetermined parameters. The system also includes a receiver mounted in operative proximity to the sensor at a location exterior to the tire. The receiver is electromagnetically coupled to the sensor and the sensor is activated in response to tire pressure reaching a level outside predetermined parameters. Also provided is an indicator which is coupled to the receiver, which signals when the tire pressure reaches a level outside predetermined parameters. The sensor is mounted within the tire that senses tire air pressure. The receiver is mounted within operative proximity to the sensor and at a location external to the tire and is electromagnetically coupled to the sensor to generate signals dispersed by the sensor that are indicative of tire air pressure sensed by the sensor.