Agilent/Keysight 34300A

The Agilent/Keysight 34300A is a high-voltage probe that extends the measurement range of compatible digital multimeters into the high-voltage domain. This 1000:1 voltage divider probe enables safe measurement of voltages up to 40 kV AC/DC peak at sea level, with a 2-meter cable and approximately 1 GΩ input resistance. The probe delivers ±2% division ratio accuracy under DC conditions with 10 MΩ termination and operates across a DC to 150 Hz bandwidth, with -3 dB attenuation at 150 Hz for AC measurements.

Input voltage derates 1% per 100 meters above sea level. The probe insulation is rated to 300 V maximum, and the 0.16 inch diameter probe tip facilitates contact with test points across various applications. Operating temperature range is 0°C to +50°C, with storage capability from -20°C to +70°C.

Note: This product is obsolete.

Technical Specifications

• Maximum Input Voltage: 40 kV AC/DC peak (at sea level)


• Voltage Division Ratio: 1000:1


• Division Ratio Accuracy: ±2% (DC, 1000:1, 10 MΩ termination)


• Input Resistance: Approximately 1000 MΩ (1 GΩ)


• Bandwidth: DC to 150 Hz (-3 dB at 150 Hz)


• Probe Insulation Rating: 300 V maximum


• Cable Length: 2 meters


• Probe Tip Diameter: 0.16 in. (3.97 mm)


• Altitude Derating: 1% per 100 meters above sea level

Key Features

• High-voltage measurement capability up to 40 kV AC/DC peak


• 1000:1 attenuation ratio reduces input signal to safe DMM levels


• Low input capacitance supports stable high-impedance measurements


• Compact probe tip enables access to confined test points


• DC and low-frequency AC measurement support

Typical Applications

• High-voltage circuit testing and troubleshooting


• Power distribution system measurements


• Industrial equipment diagnostics


• Safety-critical high-voltage verification

Compatibility & Integration Designed for DMMs with 10 MΩ input resistance, including Agilent/Keysight 34401A, 3457A, 3458A, and compatible handheld DMMs.