Keysight (Agilent) Technologies E4991B LCR/Impedance Analyzers


Impedance Analyzer

Impedance Analyzer
  • Standard Data Storage
  • 1 MHz to 500 MHz
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The E4991B Impedance Analyser has a frequency range of 1 MHz to 3 GHz. The E4991B provides 0.65% basic accuracy over a wide impedance range with a 40 V built-in DC bias source (Option 001). The equivalent circuit analysis function supports seven different multi-parameter models and helps you to simulate your own equivalent parameter values of components.


  • Three frequency options: 1 MHz to 500 MHz/1 GHz/3 GHz
  • ±0.65% basic accuracy and 120 m? to 52 k? impedance range (10% measurement accuracy range)
  • Measurement parameters: |Z|, |Y|, θ, R, X, G, B, L, C, D, Q, |Γ|, Γx, Γy, θΓ, Vac, Iac, Vdc1, Idc1 (1. Option 001 is required)
  • Built-in DC bias (Option 001): 0 V to ±40 V, 0 A to ±100 mA
  • 4-channel & 4-trace on 10.4 inch colour LCD with touch screen
  • Data analysis function: Equivalent circuit analysis, limit line test


E4991B OPTIONS (62)
8121-1226 Power Cord Cable Assembly - Europe and South Korea C13, 10A, 250V
C13APWR-918 Power Cord, Japan (100V)
C13APWR-929 Power Cord, Japan (250V)
C13SPWR-900 Power Cord, UK, Singapore, Malaysia, Hong Kong
C13SPWR-901 Power Cord, Australia and New Zealand
C13SPWR-902 Power Cord, Continental Europe, Indonesia, Korea and Vietnam
C13SPWR-903 Power Cord, United States and Canada (125V)
C13SPWR-904 Power Cord, United States and Canada (250V)
C13SPWR-906 Power Cord, Switzerland
C13SPWR-912 Power Cord, Denmark
C13SPWR-917 Power Cord, India
C13SPWR-918 Power Cord, Japan (100V)
C13SPWR-919 Power Cord, Israel
C13SPWR-920 Power Cord, Argentina
C13SPWR-921 Power Cord, Chile
C13SPWR-922 Power Cord, People's Republic of China
C13SPWR-923 Power Cord, South Africa
C13SPWR-927 Power Cord, Thailand and Philippines
C13SPWR-929 Power Cord, Japan (250V)
C13SPWR-930 Power Cord, Brazil
C13SPWR-931 Power Cord, Taiwan
C13SPWR-932 Power Cord, Cambodia
E4991B-001 Add DC Bias
E4991B-002 Material measurement firmware
E4991B-007 Temperature Characteristic Test Kit
E4991B-010 Probe station connection kit
E4991B-019 Standard Data Storage
E4991B-050 1 MHz to 500 MHz
E4991B-100 1 MHz to 1 GHz
E4991B-1A7 Calibration + Uncertainties + Guardbanding (Not Accredited)
E4991B-1CM Rack mount kit
E4991B-1CN Front handle kit
E4991B-1CP Rack mount and front handle kit
E4991B-1E5 High stability timebase
E4991B-300 1 MHz to 3 GHz
E4991B-810 Add keyboard
E4991B-820 Add mouse
E4991B-A6J ANSI Z540 compliant calibration
N1970A-900 Power cord - United Kingdom
N1970A-901 Power cord - Australia and New Zealand
N1970A-902 Power cord - Continental Europe
N1970A-903 Power cord - United States and Canada (120V)
N1970A-906 Power cord - Switzerland
N1970A-912 Power cord - Denmark
N1970A-917 Power cord - India
N1970A-918 Power cord - Japan (Straight)
N1970A-919 Power cord - Israel
N1970A-920 Power cord - Argentina
N1970A-921 Power cord - Chile
N1970A-922 Power cord - China
N1970A-927 Power cord - Thailand
PS-S10 Remote scheduled productivity assistance. Select 1 to 999 hours.
PS-S20 Startup assistance
PS-S20-01 Recommended Startup assistance
PS-T10-42XX Impedance meas. theory and techniques, 1 day (H7215B-109). Max 8 students on site.
R-50C-011-10 Calibration Assurance Plan - Return to Keysight - 10 years
R-50C-011-3 Calibration Assurance Plan - Return to Keysight - 3 years
R-50C-011-5 Calibration Assurance Plan - Return to Keysight - 5 years
R-50C-011-7 Calibration Assurance Plan - Return to Keysight - 7 years
R-51B-001-10Z Warranty Assurance Plan - Return to Keysight - 10 years
R-51B-001-5Z Warranty Assurance Plan - Return to Keysight - 5 years
R-51B-001-7Z Warranty Assurance Plan - Return to Keysight - 7 years
E4991B PRODUCT Q & A  
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