Abstract:
Device for warning of impending condensation including a sensor in contact with the element being monitored to measure conductivity at the sensor, an alarm, and electrical circuitry responding to the sensor to trigger the alarm at a given temperature above dew point.
Abstract:
A dew point hygrometer for measuring the moisture content of a gas that includes a self-contained power supply in the form of a battery and a compressed gas supply. The electrical conductivity of the water vapor in the sampling gas near the dew point is measured by a sensor, the temperature of which is also measured as well as the rate of cooling the sensor to determine the dew point temperature of the sampling gas. The battery powers electrical circuitry for making the measurements, while the compressed gas is utilized for cooling the sensor.
Abstract:
Electronic circuit capable of responding to a low signal input including a preamp magnetic amplifier circuit receiving one or a plurality of input signals and conditioned to deliver an output signal upon overcoming a reference signal, a second magnetic amplifier circuit for receiving the output signal of the preamp and conditioned to operate as a switch or as a bistable circuit and thereafter trigger a transistor for operating a relay.