The HIOKI insulation tester range on this page is designed for insulation testing of electrical equipment, high-resistance measurement and production line maintenance. It covers digital and analog insulation resistance testers as well as test leads and connection accessories. Whether you are servicing electrical equipment, inspecting distribution boards, testing solar power systems or measuring high resistance in the lab, these instruments give stable, accurate and safe results. Clear displays, quick pass/fail judgment and designs that meet international safety standards help engineers finish insulation checks quickly in complex environments, reduce misjudgment and improve maintenance efficiency.
Insulation resistance testers
| Model | Test voltages (max. range) | Insulation resistance | Low-resistance range | Voltage measurement | Size / weight |
|---|---|---|---|---|---|
| IR4056-20 | 50 V (100 MΩ), 125 V (250 MΩ), 250 V (500 MΩ), 500 V (2000 MΩ), 1000 V (4000 MΩ) | Up to 4000 MΩ | 10 Ω to 1000 Ω (200 mA) | AC/DC 4.2 V to 600 V | 159 × 177 × 53 mm / 600 g |
| 3454-11 | 250 V (500 MΩ), 500 V (500 MΩ), 1000 V (4000 MΩ) | Up to 4000 MΩ | 40 Ω to 4 MΩ (200 mA) | AC/DC 600 V | 175 × 148 × 56 mm / 530 g |
| 3490 | 250 V (100 MΩ), 500 V (100 MΩ), 1000 V (4000 MΩ) | Up to 4000 MΩ | 3 Ω / 30 Ω (200 mA) | AC 0 to 600 V | 159 × 177 × 53 mm / 610 g |
Liquid sample electrode
| Model | Capacity / electrode structure | Electrode gap | Capacitance / electrode constant | Size | Used with |
|---|---|---|---|---|---|
| SME-8330 | 25 mL / guarded three-electrode design (main, counter, guard) | 1 mm | 45 pF between main and counter electrodes / about 500 cm | φ36 × 140 mm | SM7110, SM7120, SM7420 and other super megohmmeters (the SM7000 series needs the Z5010 adapter) |
Accessory
| Model | Type | Length | Includes | Safety rating | Used with |
|---|---|---|---|---|---|
| L9787 | Test lead set | 1.2 m | Red and black test leads, alligator clips, line / earth leads | CAT III 1000 V / CAT IV 600 V | 3490 and IR40xx series insulation testers |
Model highlights
- IR4056-20: five-range digital insulation tester with 50 V to 1000 V test voltages, PASS/FAIL judgment and a 0.8 s response, plus built-in low-resistance testing and AC/DC 600 V voltage measurement.
- 3454-11: three-range digital insulation tester with PASS/FAIL lamp and buzzer, 200 mA low-resistance continuity testing and AC/DC voltage measurement.
- 3490: analog insulation tester with a needle scale and LED indicators for intuitive operation, 200 mA continuity testing and AC 600 V voltage measurement.
- L9787: 1.2 m test lead set with alligator clips and detachable tips, for IR40xx and 3490 series insulation testers.
- SME-8330: liquid sample electrode with a guarded three-electrode design, measuring volume resistivity up to 10^19 Ω·cm; chemical resistant and easy to clean.
Common features
- Meet CAT III 600 V safety ratings and related international standards for safe testing.
- Suitable for high-resistance and insulation resistance measurement, improving equipment inspection and quality control.
- Rugged design for production line maintenance, equipment servicing and laboratory use.
- Multiple test voltages and test methods for different electrical equipment and materials.
- Accessories designed by the manufacturer to match the instruments help keep measurements stable and accurate.
Applications
- Insulation testing and maintenance checks of electrical equipment
- Inspection of distribution boards, wiring systems and circuit breakers
- Testing of solar power systems, EV equipment and power systems
- Industrial equipment maintenance and electrical safety checks
- High-resistance measurement and resistivity testing of liquids in the lab
How to request a quote: please send (1) the model; (2) the test voltage you need; (3) the quantity; (4) how urgent it is.
Trademarks: HIOKI and the model names on this page are trademarks or model names of their owner, used here only to identify the products. JIAHON is not the authorized distributor of HIOKI in Taiwan.
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