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The MICRO~flex is a flexible AC current probe based on the Rogowski principle. With proper signal conditioning, it can be used with compatible equipment to measure currents from extremely low frequencies up to 1 MHz. Its lightweight and flexible measuring head allows for quick and easy installation in hard-to-reach areas or around large conductors.
Typical Voltage Output:
VoRMS (sinusoidal current): (0.892 × 10⁻⁷) × IRMS × Frequency
VoRMS at 1000 ARMS × 60 Hz: 5.36 mV
VoRMS at 1000 ARMS × 50 Hz: 4.47 mV
General Specifications
Output Sensitivity Tolerance (Uncalibrated): ±10% of reading (max)
Linearity (10% to 100% of range): ±0.2% of reading
Internal Resistance per Probe (2” / 3” / 4”): 4 Ω / 6 Ω / 8 Ω (nominal)
Bandwidth (-1 dB): 20 Hz to 1 MHz
Phase Shift: ±1°
Temperature Coefficient: ±0.05% of reading / °C
Position Sensitivity: ±2.5% of reading
External Magnetic Field (with cable >100 mm from the head): ±0.25% of range
Operating Voltage (see Safety Standards section): 1000 V AC RMS or DC (probe)
Physical & Environmental Properties
Probe Material: UL94 V-0 compliant
Probe Cable Length / Loop Diameter:
160 mm (6”) / 50 mm (2”)
220 mm (9”) / 70 mm (3”)
315 mm (12”) / 100 mm (4”)
Probe Cable Diameter: 6 mm (nominal)
Output Cable Length: 2 m
Operating Temperature Range: -20°C to +65°C
Storage Temperature Range: -40°C to +75°C
Operating Humidity: 15% to 85% (non-condensing)
Protection Rating: IP67
Color: Green
Output Connector: (Specify if applicable)
Safety Standards
EN 61010-1
EN 61010-2-032
1000 VRMS, Category III, 600 VRMS, Category IV, Pollution Degree 2 (Probe and Integrator)
Use of the probe on uninsulated conductors is limited to 1000 V ACRMS or DC and frequencies
below 1 kHz.
