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A device for transmitting measured values to a remote location characterized by the sensor device applying an output voltage control to an electro-optical modulator to create a light signal from a source of light received from an optical divider for conducting back to the remote location and the ene

A device for transmitting measured values to a remote location characterized by the sensor device applying an output voltage control to an electro-optical modulator to create a light signal from a source of light received from an optical divider for conducting back to the remote location and the energy for the sensor device being supplied as light energy from a remote location to the optical divider whose other output beam is converted into electrical energy by a transducer associated with the sensor device.

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In a device for transmitting measured values of a measured condition from a test location to a remote location, said device comprising sensor means for testing a condition to be measured and creating an electrical output signal dependent on the value of the condition, said sensor means requiring ele

In a device for transmitting measured values of a measured condition from a test location to a remote location, said device comprising sensor means for testing a condition to be measured and creating an electrical output signal dependent on the value of the condition, said sensor means requiring electrical energy for operation and having electrical parts and at least one sensor element for creating an electrical signal which is dependent on the measured values, and means for communicating the electrical output signal to a remote location, the improvements comprising the means for communicating including a modulator means being disposed adjacent the sensor means for receiving the electrical output signal of the sensor means and modulating light into a light signal in response to the electrical output signal, a first optical line for conveying light to the modulator means, a second optical line for conveying the light signal from the modulator means back to a location remote from the sensor means; said sensor means including electronic means for converting the electrical signal of the sensor element into an electrical output signal for operating the modulator means by creating an output voltage of an alternating voltage whose frequency is modulated by the electrical signal of the sensor element; said device including means for supplying light energy to the first optical line and electrical energy to the sensor means including means for forming a light source at a position remote to the sensor means, a voltage transformer, an electrical rechargeable storage device being connected to the voltage transformer, transducer means being disposed adjacent the sensor means for converting light into electrical energy for operation of the electrical parts of the sensor means, said transducer means being connected to the sensor means by the voltage transformer, optical means for dividing an incoming beam of light into two output beams of light being positioned adjacent the transducer means and sensor means, one of the two output beams being connected to the first optical line, a third optical line extending from said means for forming a light source to the optical means, and a fourth optical line extending from said optical means to the transducer means to supply the other of the two output beams to the transducer means; and said device including structural means to encapsulate the modulator means, the voltage transformer, the storage device, the transducer means and the sensor means in an electrical insulation material with only the sensor element being accessible from the exterior of the structural means.