Kyoritsu Digital Earth Tester 4105A
The Kyoritsu Digital Earth Tester 4105A is a robust, handheld instrument engineered for precise earth resistance and voltage measurements in a variety of electrical environments. Built to IEC 61557 safety standards and rated CAT III 300 V, it features dust‑ and drip‑proof (IP54) construction that permits reliable operation even in adverse weather conditions. At its core is a large, backlit LCD that clearly displays measured values, while a simplified dual‑purpose probe combining an alligator clip and flat test bar streamlines setup.
The tester automatically warns when auxiliary earth‑spike resistance exceeds safe limits, helping prevent misleading readings and ensuring operator safety. Powered by six R6P (AA) batteries, it offers both precise three‑terminal measurements (20 Ω, 200 Ω, 2000 Ω ranges) and a quick, two‑terminal “simplified” mode for rapid checks. An earth‑voltage function (up to 200 V max) further expands its utility, verifying residual voltage before conducting resistance tests. Housed in a convenient soft carry bag,
the 4105A is ideal for field engineers and electricians servicing power distribution lines, in‑house wiring systems, and industrial equipment. Its combination of rugged design, versatile measurement modes, and intuitive operation makes it an indispensable tool for ensuring grounding effectiveness and electrical safety.
Features:
- Conforms to IEC 61557 earth‑resistance safety standards.
- IP54‑rated dust‑ and drip‑proof housing for outdoor use.
- Large, easy‑to‑read backlit LCD display.
- Simplified dual‑function probe (alligator clip + flat test bar).
- Automatic warning if auxiliary spike resistance exceeds limits.
- Earth‑voltage measurement up to 200 V to confirm safe testing conditions.
Specifications:
| Specification | Details |
|---|---|
| Earth‑Resistance Ranges: | 20 Ω, 200 Ω, 2000 Ω (3‑terminal precise) |
| Simplified Range: | Two‑terminal 2000 Ω, 200 Ω, 20 Ω |
| Earth‑Voltage Range: | 0–200 VDC/AC |
| Accuracy: | ±30 % operating uncertainty (per IEC 61557‑5) |
| Safety Standards: | IEC 61010‑1 CAT III 300 V; IEC 60529 (IP54); IEC 61557‑1,5 |
| Power Supply: | R6P (AA) × 6 |
| Operating Temp/Humidity: | –10 °C to +50 °C; ≤ 85 % RH (non‑condensing) |
| Dimensions: | 175 × 87 × 45 mm |
| Weight: | 500 g (with batteries) |
Applications:
- Power distribution line grounding checks.
- In‑house electrical wiring earth resistance testing.
- Earth‑voltage verification before maintenance.
- Industrial equipment grounding inspection.
Package Contents:
- 1x Main unit (Kyoritsu 4105A earth tester)
- 1x Precision measurement test leads (Model 7095A)
- 1x Simplified measurement test leads (Model 7127A)
- 1x Protective fingerguard
- 1x Shoulder strap belt (M‑9121)
- 1x Soft carrying bag
- 6x Batteries (R6P/AA)
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