Abstract: A contact hazard meter used to measure electromagnetic field induced currents which would flow through a human body to ground upon physical contact with an item carrying such field induced currents includes a conductive contact, a human equivalent circuit coupled to the conductive contact and an electronic circuit coupled to the human equivalent circuit for measuring and displaying a measurement of current flowing from the item and through the human equivalent circuit when the conductive contact is placed in physical contact with the item carrying the field induced currents. The human equivalent circuit approximates the impedance of the human body at varying frequencies. The contact hazard meter has a plurality of range settings, one setting providing the resultant current as a percentage of a safety guideline maximum permissible exposure value.

Abstract: A personal electromagnetic radiation monitor includes an electromagnetic radiation sensor assembly having a surface area sensor in the form of a conductive can-shaped or boss-like element. The surface area sensor detects the radial electric field component directly from the radiating antenna or a secondary radial field component created by the displacement current induced in the wearer of the personal monitor who is illuminated by the electromagnetic radiation. The radial field component is detected by a diode detector circuit and is provided to a comparator circuit which will trigger an alarm if the induced current exceeds a predetermined level.

Abstract: A workstation mat used to monitor radio frequency, electromagnetic field induced currents flowing through the body of a person standing on the workstation mat. The workstation mat includes an upper and lower conductive plate residing in parallel planes. The upper plate is superposed in spaced apart relation over the lower plate. The mat also includes an electronic circuit coupled to the conductive plates. The electronic circuit senses the induced current flowing through a person's body and sounds an alarm to warn the worker when the induced body current meets or exceeds a predetermined current threshold. The threshold setting is variable and preset by the user. The workstation mat has a reset button switch mounted on one lateral side and contains connectors for a remote alarm and a remote reset switch.

Abstract: A wide power range radiation monitor includes a pair of diodes with their cathodes interconnected and with an additional capacitor coupled in parallel to one of the diodes. The detector, of the radiation monitor provides two outputs, a low power output and a high power output, which outputs are connected to the anodes of the detector diodes. The arrangement of dual diodes and capacitance provide the diode detector of the monitor with a greater than 40 dB square law region.

Abstract: An antenna for use in measuring current induced in a human body from exposure to radio frequency, electromagnetic fields approximates the impedance the human body over a wide frequency band of operation. The antenna includes an elongated resistive strip secured to a rigid supporting member, the supporting member and resistive strip being mounted on a supporting base plate. The antenna obviates the need for a human subject to be exposed to electromagnetic fields which need to be assessed to determine whether the induced current exceeds permissible guidelines. The antenna is collapsible so that it is easily transported to any desired location.

Abstract: A wide power range radiation monitor includes a pair of diodes with their cathodes interconnected and with an additional capacitor coupled in parallel to one of the diodes. The detector of the radiation monitor provides two outputs, a low power output and a high power output, which outputs are connected to the anodes of the detector diodes. The arrangement of dual diodes and capacitance provide the diode detector of the monitor with a greater than 40 dB square law region.

Abstract: A personal electromagnetic radiation monitor includes an electromagnetic radiation sensor in the form of at least one coil mounted on a rectangular form of lossy material. A first metal shield plate is situated adjacent to one side of the form on which the coil is mounted, and a second metal shield plate is situated on another side of the form. The metal shield plates have an impedance which varies substantially inversely proportional with the frequency of electromagnetic radiation sensed by the coil, and compensate for the variation in the magnitude of the induced current in the coil, which induced current, without at least one of the shields, would have varied in magnitude substantially directly proportional with the frequency of the electric field component of the electromagnetic radiation, so that the magnitude of an output signal generated by the sensor is relatively independent of the frequency of the sensed electromagnetic radiation.

Abstract: A personal electromagnetic radiation monitor includes an electromagnetic radiation sensor in the form of at least one coil mounted on a rectangular form of lossy material. A first metal shield plate is situated adjacent to one side of the form on which the coil is mounted, and a second metal shield plate is situated on another side of the form. The metal shield plates have an impedance which varies substantially inversely proportional with the frequency of electromagnetic radiation sensed by the coil, and compensate for the variation in the magnitude of the induced current in the coil, which induced current, without at least one of the shields, would have varied in magnitude substantially directly proportional with the frequency of the electric field component of the electromagnetic radiation, so that the magnitude of an output signal generated by the sensor is relatively independent of the frequency of the sensed electromagnetic radiation.

Abstract: A wide power range radiation monitor includes a pair of diodes with their cathodes interconnected and with an additional capacitor coupled in parallel to one of the diodes. The detector of the radiation monitor provides two outputs, a low power output and a high power output, which outputs are connected to the anodes of the detector diodes. The arrangement of dual diodes and capacitance provide the diode detector of the monitor with a greater than 40 dB square law region.

Abstract: A personal electromagnetic radiation monitor includes an electromagnetic radiation sensor, a conductive shield spaced apart from the sensor and a backing of graduated lossy material. The electromagnetic radiation sensor includes thin film resistive thermocouples. The backing of graduated lossy material is interposed between the radiation sensor and the conductive shield. The layer is progressively more conductive through its thickness from the side which faces the sensor to the side which faces the conductive shield.

Abstract: An electric field sensitive probe capable of measuring both CW and pulsed signals with consistent efficiency using a diode detector connected to a dipole antenna in which a shunt capacitor is connected in parallel with the dipole and one or more resistive elements are connected in series between the diode and the dipole.