Isotropic electric field probe - 300 kHz to 18 GHz: WPF18 | Wavecontrol

The WPF18 is an isotropic electric field probe designed for RF exposure assessment from 300 kHz to 18 GHz. It provides True RMS electric field measurement for professional EMF surveys, telecom audits and occupational exposure evaluations.

The probe is based on isotropic RMS diode technology and offers a flat frequency response, high sensitivity from 0.5 V/m and excellent attenuation at 50/60 Hz. It is available in a standard version and a High Power version, WPF18-HP, for applications requiring an extended CW measurement range.

The WPF18 is compatible with SMP2, MonitEM and MapEM platforms and is intended for measurements performed in accordance with international standards.

Benefits

• Wide RF coverage: electric field measurement from 300 kHz to 18 GHz.
• High sensitivity: measurement from 0.5 V/m for low-level RF exposure assessment.
• Isotropic True RMS measurement: reliable electric field evaluation without directional alignment constraints.
• Standard and High Power versions: WPF18 for standard field measurements and WPF18-HP for CW levels up to 1000 V/m.
• Excellent 50/60 Hz attenuation: attenuation greater than 60 dB for reduced low-frequency interference.
• ISO 17025 calibration: supplied with ISO 17025 accredited calibration under ILAC recognition.
• Compact and lightweight: 95 g probe weight for practical field and laboratory use.

Key features

• Frequency range: 300 kHz to 18 GHz.
• Measured field: electric field.
• Sensor type: isotropic RMS diode technology.
• Frequency response type: flat.
• Standard measurement range: 0.5 to 250 V/m CW and 0.5 to 30 V/m RMS.
• High Power measurement range: 0.5 to 1000 V/m CW and 0.5 to 30 V/m RMS.
• Dynamic range: 54 dB for WPF18 and 66 dB for WPF18-HP.
• Sensitivity: 0.5 V/m.
• Resolution: 0.1 V/m from 10 V/m to 250 V/m.
• Frequency response: ±2 dB from 1 MHz to 5 GHz and +0 / -6 dB from 5 GHz to 18 GHz.
• Linearity: ±0.5 dB from 1 V/m to 150 V/m.
• Isotropic deviation: ±1.2 dB up to 10 GHz and ±3 dB from 10 GHz to 18 GHz.
• Calibration: ISO 17025 accredited calibration, ILAC.
• Calibration period: 24 months recommended.
• Temperature range: -20 °C to 50 °C.
• Dimensions: 28.4 cm x 6 cm diameter.
• Weight: 95 g.

Typical applications

• Telecommunications: certification and audit of telecommunication services including GSM, 3G, LTE, TDT, FM and WiFi.
• Industry: assessment of industrial processes for worker RF exposure protection.
• Defence: assessment of military sites and personnel exposure protection.
• Laboratories and R&D: RF exposure protection for R&D and laboratory personnel.
• EMF compliance surveys: electric field measurements requiring coverage from 300 kHz to 18 GHz.

Why choose WPF18

The WPF18 is suitable for technical teams that need a sensitive, wideband electric field probe for RF exposure assessment across telecommunications, industrial and laboratory environments. Its 300 kHz to 18 GHz frequency range covers a broad spectrum of RF sources while maintaining practical field usability.

The availability of the WPF18-HP High Power version provides additional flexibility for environments where higher CW field levels must be measured. With True RMS isotropic measurement, ISO 17025 accredited calibration and compatibility with SMP2, MonitEM and MapEM, the WPF18 supports repeatable and standards-oriented measurement workflows.