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| Brand | All Precision Instrument |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Manufacturer |
| Product Origin | Domestic (China) |
| Model | GDA-A |
| Price | USD 2,500 (approx.) |
| Brand | North Guangjingyi / All Precision Instrument |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Manufacturer |
| Country of Origin | China |
| Model | GDAT-C2 |
| Price | USD 4,950 (approx.) |
| Power Supply | AC 220 V ±10%, 50/60 Hz ±1% |
| Dimensions | 450 × 410 × 320 mm |
| Weight | 25 kg |
| Operating Temperature | 0–40 °C |
| Relative Humidity | <75% RH |
| Capacitance Range | 5–200 pF |
| Relative Permittivity Range | 1.000–30.000 |
| Dissipation Factor Range | 1×10⁻⁵–100 |
| DC Resistivity Range | 2.5 MΩ·m–20 TΩ·m |
| Temperature Control Range | 0–125 °C |
| Temp. Accuracy | ±0.5 °C |
| AC Test Voltage | 200–2200 V (50 Hz, continuously adjustable) |
| DC Test Voltage | 0–500 V (continuously adjustable) |
| Heating Method | Medium-frequency induction with PID control |
| Electrode Configuration | Three-electrode cell per GB/T 5654–2007, 2 mm inter-electrode gap |
| Internal Standard Capacitor | SF₆-filled three-terminal capacitor |
| Data Storage | Onboard non-volatile memory with real-time clock (RTC) |
| Display | 5.7″ TFT color touchscreen, full Chinese GUI |
| Compliance | GB/T 5654–2007, ASTM D924, IEC 60247, ISO 6296 |
| Brand | Beijing North Guang Precision Instrument |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Product Origin | Domestic (China) |
| Model | BEST-911 |
| Price | USD 3,500 (FOB Beijing) |
| Measurement Range | 10⁻⁹ Ω·m to 10¹¹ Ω·m |
| Accuracy | ±1% to ±5% |
| Electrometer Input Resistance | ≥10¹⁴ Ω |
| Electrometer Voltage Range | ±100 mV to ±200 V |
| Picoammeter Sensitivity | 1 fA (1×10⁻¹⁵ A) |
| Adjustable DC Voltage Source Accuracy | ±1% |
| Electrode Configuration | Standard Four-Electrode Fixture Included |
| Current Electrode Spacing | 100 mm |
| Potential Electrode Spacing | 20 mm |
| Insulating Base Resistivity | ≥10¹⁴ Ω·m |
| Applied Test Pressure | 3.25 N |
| Net Weight | 331 g |
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