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| Brand | All Precision Instrument |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | B121 |
| Price | USD 1,200 (FOB Beijing) |
| Compliance | GB/T 1410–2006 / IEC 60093:1980 |
| Measurement Principle | Guarded Three-Electrode Ring Method |
| Resistance Range | 1.0×10³ – 2.0×10¹² Ω |
| Resistivity Range | 1.0×10³ – 2.0×10¹² Ω·m |
| Sheet Resistance Range | 1.0×10⁴ – 2.0×10¹² Ω/□ |
| Resolution | 0.1×10³ – 0.1×10¹² Ω (auto-ranging) |
| Power Supply | 220 V ±10%, 50 Hz ±4%, ≤20 W |
| Dimensions (W×H×L) | 280 × 90 × 275 mm |
| Net Weight | ≤3.0 kg |
| Standard Electrode | Triple-ring coaxial electrode (center cylinder Ø50 mm × 40 mm h |
| Brand | All Precision Instrument |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Model | BC-50KV |
| Output Voltage Range | AC/DC 0–50 kV |
| Rated Capacity | 5 kVA |
| Voltage Accuracy | ≤1% |
| Rise Rate Adjustment | 0.1–5.0 kV/s (continuously variable) |
| Test Modes | AC/DC stepwise ramp, constant-rate ramp, and hold-at-level withstand testing |
| Short-Circuit Response Time | ≤0.05 s |
| Leakage Current Measurement Range | 0–200 mA (real-time, mA-resolution) |
| Electrode Set per GB/T 1408.1–2006 | Two Φ25 mm × 25 mm |
| Test Mediums | Air or insulating oil |
| Compliance Standards | IEC 60243-1, ASTM D149, GB/T 1408.1–2006, UL 508, CSA C22.2 No. 0.3 |
| Brand | North Guang Precision Instruments |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Model | BEST-121 |
| Test Voltage Range | DC 10 V, 50 V, 100 V, 250 V, 500 V, 1000 V |
| Resistance Measurement Range | 1×10⁴ Ω to 1×10¹⁸ Ω |
| Current Measurement Range | 2×10⁻⁴ A to 1×10⁻¹⁶ A |
| Accuracy | ±1% (10⁴–10⁹ Ω), ±5% + 2 digits (10¹⁰–10¹¹ Ω), ±5% + 5 digits (10¹²–10¹³ Ω), ±10–15% + 5 digits (>10¹⁴ Ω) |
| Compliance | GB 4386-84, GB 6650-86, GB 1410, GB 10580 |
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