Description
Specifications
- Model: MM-108D
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Resistance Range: 1 Meg-ohm to 1 × 10⁸ Meg-ohms (100 Million Meg-ohms / 100 Tera-ohms)
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Test Voltage Range: 70–600 V DC (adjustable)
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Fine Voltage Adjustment: Yes
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Accuracy: ±5% (Resistance), ±1% (Voltage)
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Voltage Display: Digital readout
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Output Protection: Short-circuit protected
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Stability: Stable infinity reading even in high humidity
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Model Variant: MM-108HD available with same resistance range but at higher voltage of 1000 V DC instead of 500 VDC
Million Meg Ohm Meter (MM-108D) – High-Precision Teraohmmeter for Insulation Resistance Testing
The Million Meg Ohm Meter MM-108D is a robust and highly reliable instrument designed for precise measurement of extremely high resistance values, extending up to 100 Tera-ohms. Ideal for insulation resistance testing, it is widely used in high-voltage laboratories, cable manufacturing, transformer testing, motor winding analysis, and industrial insulation diagnostics.
Built with advanced circuitry and high-stability components, this meter ensures accurate readings even in high humidity conditions. The unit includes a digital voltage readout for precise output monitoring and features short-circuit protection for enhanced safety and durability.
Key Features
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✔ Measures ultra-high resistance values with exceptional accuracy
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✔ Stable readings across all ranges, even under high humidity
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✔ Adjustable test voltage with four selectable steps
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✔ Digital voltage indication for precise monitoring
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✔ Long operational reliability
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✔ Designed for laboratory, industrial, and field-use applications
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✔ Easy-to-operate interface suitable for technicians and engineers
Applications
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Insulation resistance testing
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High-voltage equipment diagnostics
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Transformer and motor coil testing
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Cable insulation quality assessment
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Material dielectric property testing
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Scientific and industrial R&D
The MM-108D Million Meg Ohm Meter delivers dependable performance, making it the preferred choice for professionals who require accuracy, stability, and long-term reliability in ultra-high resistance measurement.




