This product has been discontinued. It can be replaced by: EFS 9221 – Active Biconical Broadband Antenna
Datasheet EFS 9218EFS 9218 – Active Electric Field Probe with Biconical Elements
The EFS 9218 is very symmetrical active electric field probe designed for precise and accurate measurements across a wide frequency range of 9 kHz to 300 MHz. This probe is a small, light-weight and equipped with biconical elements, built-in amplifier and NiMH rechargeable batteries. A switchable amplifier is integrated to enhance the probe’s sensitivity, improving the antenna factor to 20 dB/m. In order to eliminate power supply problems and stray coupling, NiMH rechargeable batteries are built in the mounting tube.
The EFS 9218 is ideal for frequency selective E-field measurements both indoors and outdoors. It is commonly used with test receivers or spectrum analyzers to measure electric fields in various environments, ensuring precise and reliable data for electromagnetic compatibility (EMC) testing and other applications.
| Frequency range: | 9 kHz – 300 MHz |
| Connector: | 50 Ω, N-female |
| Mounting tube: | 22 mm |
| Element length total: | LE=140 mm |
| Element diameter: | D = 49 mm |
| Element fixture: | M4 |
| Antenna Factor (Amplifier OFF): | 47 dB/m typ. (40 kHz-250 MHz) |
| Antenna Factor (Amplifier ON): | 20 dB/m typ. (40 kHz-250 MHz) |
| Maximum Field strength (Amplifier OFF): | 65 V/m |
| Maximum Field strength (Amplifier ON): | 3 V/m |
| Mimimum Field strength typ.: | 12 µV/m (F=30 MHz, ΔF=9 kHz, Average) |
| Inversion Symmetry: | typ. < 1 dB (100 kHz - 250 MHz) |
| Operation Time: | >5 h |
| Power Supply: | 7.2 V, 600 mAh NiMH |
| Weight (incl. batteries): | >1000 g |