New Update on the EF-1891 Probe for the Narda NBM-500 Series

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Narda NBM 500 Series EF-1891 Probe Update

Designed to detect high frequency electric and magnetic fields, the Narda Safety Test Solutions NBM-500 series of broadband field meters produces accurate and reliable measurements for personal safety. Through the use of a range of probes, the NBM-500 series is suitable for practically all applications within the 0 Hz (DC) to 100 GHz frequency range.

Narda NBM-500 Series | Air-Met Scientific

The EF-1891 antenna for the NBM-500 series enables measurements from 3 MHz to 18 GHz and is compatible with the NBM-520 and NBM-550 broadband meters. With three orthogonally arranged dipoles with detector diodes, the probe can output three voltages individually at the probe output corresponding to the spatial components, with the resulting isotropic field strength calculated by the NBM base unit. The NBM E-Field Probe’s dynamic range, spanning from 0.6 V/m to 800 V/m (62 dB), renders it perfectly suited for measuring exposure levels in both public and occupational environments. To further improve on the probe’s capabilities, Narda has announced a new version of the EF-1891 with updated specifications as shown in the comparison table below.

Key features of the EF-1891 probe include:

  • Flat frequency response
  • Diode sensors
  • Isotropic (non-directional) measurement
  • Multi-point calibration
  • Modular, can be used with any NBM basic unit including the NBM-520 and discontinued NBM-550
  • Measurements for general public and occupational field exposure from radio broadcasting, telecommunication, and radar
  • 62 dB dynamic range without changing measurement range

EF-1891 Electric Field Probe Specifications Comparison

EF1891 2402/02B (old) 2402/02C (new)
Measurement range 0.6 to 1000 V/m (CW)
0.6 to 35 V/m (True RMS)
100 nW/cm² to 265 mW/cm² (CW)
100 nW/cm² to 325 μW/cm² (True RMS)
0.6 bis 800 V/m (CW)
0.6 bis 65 V/m typ. (True RMS)
0.1 μW/cm² to 170 mW/cm² (CW)
0.1 μW/cm² to 1.12 mW/cm² (True RMS)
Dynamic range 64 dB 62.5 dB
CW damage level 1600 V/m 700 mW/cm² 1100 V/m 320 mW/cm²
Peak damage level 16 kV/m 70 W/cm² 1400 V/m 520 mW/cm²
Flatness of frequency response
Calibration uncertainty not included
±1 dB (10 MHz to 3 GHz)
+2/ -1 dB (3 to 7 GHz)
+3/ -1 dB (7 to 11 GHz)
+3/ -4 dB (11 to 18 GHz)
typ. +2 dB/-2 dB @ 3MHz
typ. -3 dB @ 18 GHz
+1/-1.5 dB (10 MHz bis 3 GHz)
+2/ -1.5 dB (>3 GHz bis 11 GHz)
Linearity
Referred to 0.2 mW/cm² (27.5 V/m)
±3 dB (0.8 to 1.65 V/m)
±1 dB (1.65 to 3.3 V/m)
±0.5 dB (3.3 to 300 V/m)
±0.8 dB (300 to 1000 V/m)
±3 dB (170 to 720 nW/cm²)
±1 dB (720 nW/cm² to 2.9 μW/cm²)
±0.5 dB (2.9 μW/cm² to 24 mW/cm²)
±0.8 dB (24 to 265 mW/cm²)
±2 dB (0.6 to 4 V/m)
±0.5 dB (4 to 300 V/m)
±2 dB (300 to 800 V/m)
±2 dB (0.1 to 4.2 μW/cm²)
±0.5 dB (4.2 μW/cm² to 24 mW/cm²)
±2 dB (24 mW/cm² to 170 mW/cm²)
Isotropic response ±1 dB (27 MHz to 1 GHz)
±2 dB (1 GHz to 18 GHz)
±1 dB (10 MHz to 5 GHz)
±2.25 dB (>5 GHz to 11 GHz)

Full specifications for the new probe are available from the datasheet below.

EF-1891 Probe Datasheet

Compatible Broadband Meters

NBM-520 Broadband Field Meter

NBM-520 Broadband Field Meter

Compact handheld device for measuring electric and magnetic fields.

NBM-550 Broadband Field Meter

NBM-550 Broadband Field Meter

Compact device for measuring electric and magnetic fields. NOTE: Discontinued, available for rental only.

Note: NBM probes can also be used with the Narda FieldMan EMF Meter through the use of a probe converter. For more information, contact your local Air-Met Scientific representative.

The NBM series of units and accompanying probes are available in Australia exclusively from Air-Met Scientific. To browse our full range of Narda radiation products, click here.

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Date and Time

Fri. 12 Apr 2024

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Location

Australia

New Update on the EF-1891 Probe for the Narda NBM-500 Series