Field Instruments

Product Overview

The Kyoritsu KEW 4105A Digital Earth Tester is a rugged and reliable earth resistance tester designed for accurate grounding measurements in field environments. Internationally recognized for reliability, it delivers stable and precise results even in electrically noisy conditions.

The KEW 4105A supports both 3-wire and 2-wire earth resistance measurements, making it suitable for electrical installations, industrial plants, substations, and lightning protection systems.

With an IP54-rated enclosure and automatic checking of auxiliary earth spike resistance, it ensures dependable operation in demanding outdoor conditions.

Key Features

• 3-wire and 2-wire earth resistance measurement
• 3 measurement ranges (0.01 Ω to 2000 Ω)
• Earth voltage measurement (0 V to 200 V AC)
• Automatic checking of current spike resistance
• Large digital LCD display
• IP54 protection (dust & splash resistant)
• Simple rotary selector switch operation
• Overload protection on measurement terminals
• Compact and lightweight design

Technical Specifications

Manufacturer Information

• Manufacturer: Kyoritsu
• Model: KEW 4105A Digital Earth Tester

Measurement Ranges

Earth Resistance:
• 0–20 Ω
• 0–200 Ω
• 0–2000 Ω

Earth Voltage:
• 0–200 V AC

Accuracy

Earth Resistance:
• ±2% rdg ±0.1 Ω (20 Ω range)
• ±2% rdg ±3 dgt (200 Ω / 2000 Ω ranges)

Earth Voltage:
• ±1% rdg ±4 dgt

Overload Protection

• Earth resistance: 280 V AC for 10 seconds
• Earth voltage: 300 V AC for 1 minute

General Specifications

• Applicable Standards: IEC61010-1 CAT III 300V, IEC61557-1/5
• Protection Rating: IP54
• Power Supply: 6 × 1.5 V AA batteries
• Dimensions: 105 (L) × 158 (W) × 70 (D) mm
• Weight: Approx. 550 g

Standard Accessories (KEW 4105A)

• Earth resistance test leads set (red, yellow, green)
• Auxiliary earth spikes (2 pcs)
• Simplified measurement probe
• Shoulder strap
• 6 × AA batteries
• Instruction manual
• Carrying case (soft case 9084)

Applications

• Electrical grounding system testing
• Industrial plant earthing verification
• Substation ground resistance measurement
• Lightning protection system inspection
• Preventive maintenance and compliance testing

Why Buy from FieldInstruments.lk? (Kyoritsu KEW 4105A)

• 100% Genuine Kyoritsu Instruments – Original products with manufacturer warranty
• Competitive pricing with fast island-wide delivery
• Trusted supplier for professional electrical testing equipment
• Local warranty support and technical assistance
• Reliable after-sales service and calibration guidance
• Expert consultation for grounding compliance applications

Fieldinstruments.lk
50/3, Angampitiya Rd, Ethul Kotte, Sri Lanka. 10100.
Phone: +94718555888 Email: info@fieldinstruments.lk