Four Probe Method

Description

Four Probe Experimental Setup (Model: ZO-D190) | Zodiac Overseas

Product Description:

The ZO-D190 Four Probe Experimental Setup is a precision laboratory instrument designed to measure the resistivity of semiconductors at different temperatures and to determine their energy band-gap using the four-probe method. This apparatus is widely used in physics and electronics laboratories of universities, engineering colleges, and research institutions for advanced studies in solid-state physics and semiconductor materials.

Key Features:

• Four Probe Arrangement:
  • Four collinear, spring-loaded probes mounted in a Teflon bush for excellent insulation
  • Ensures equal probe spacing and reliable contact with sample
  • Mounted on a sturdy stand with current & voltage leads
• Measurement System (ZO-D190 Unit):
  • Digital Millivoltmeter
    • Range: 0–200 mV (X1), 0–2 V (X10)
    • Resolution: 100 µV (X1)
    • Accuracy: ±0.1% of reading ±1 digit
    • 3½ digit, 7-segment LED display
  • Constant Current Generator
    • Current range: 0–20 mA (resolution: 10 µA)
    • Accuracy: ±0.25%
    • Excellent load & line regulation
  • Oven Power Supply (in-built)
• Accessories Supplied:
  • High-temperature oven (up to 200°C)
  • Ge (n-type) semiconductor sample
  • Thermometer (0–150°C)

Applications:

• Measurement of semiconductor resistivity at various temperatures
• Determination of band-gap energy of semiconductors
• Educational demonstration of four-probe technique
• Research in solid-state physics, materials science & electronics

Advantages:

• Accurate and reliable semiconductor characterization
• Compact, integrated, and user-friendly design
• Built-in oven supply for temperature-controlled experiments
• Trusted by colleges, universities, and R&D labs

Made in India | Precision Physics Laboratory Equipment | Durable & Reliable