Holaday/ETS-Lindgren HI-4455 Electric Field Probe, 200 kHz - 40 GHz

The Holaday/ETS-Lindgren HI-4455 Electric Field Probe, 200 kHz - 40 GHz, is a battery-operated broadband Isotropic Electric Field Probe designed for use in making RF exposure measurements in the vicinity of broadcast facilities and industrial RF sources. Applications include: Health and Safety monitoring, measuring microwave transmitters and antennas, EMI monitoring, and measuring the fields generated by ISM equipment. This probe uses optical isolation to minimize field perturbation during measurements.

The HI-4455 probe assembly consists of a conical casing, containing the sensor, which is mounted on one end of a shaft; the other end of the shaft is attached to an extrusion that houses the electronics (Figure 1). The sensor and electronics housing operate-and are calibrated-as a unit.

The HI-4455 measures the field strength in each of three axes. It performs a vector addition calculation on the readings and sends the resultant to the receiver via a fiber optic cable. Frequency response of the HI-4455 is 200 kHz to 40 GHz; dynamic range is 2 to 300 Volts per meter (V/m).