Fluke 1503 Insulation Resistance Meter

The Fluke 1503 Insulation Resistance Tester is an efficient and rugged handheld device designed to handle all your basic insulation testing needs. Built in the same form factor as the Fluke 1507, the 1503 offers a simplified feature set, making it a cost-effective choice for professionals seeking dependable performance without unnecessary complexity.

The tester offers two selectable insulation test voltages (500V and 1000V) and can measure insulation resistance from 0.01 MΩ to 2000 MΩ, making it suitable for testing motors, transformers, electrical installations, and other wiring systems. Its live circuit detection automatically prevents testing when voltages above 30V are present, ensuring operator safety.

For additional functionality, the Fluke 1503 also measures AC/DC voltage up to 600V, performs low-ohms earth-bond continuity testing with a 200 mA current, and supports resistance measurements up to 20 kΩ. Its auto-discharge capability safely releases stored capacitive energy, while the remote test probe simplifies repetitive and hard-to-reach testing tasks.

Equipped with a large backlit display, the tester ensures easy readability even in low-light environments. With CAT IV 600V safety rating, IP40 protection, and a rugged design capable of withstanding a 1-meter drop, the Fluke 1503 is built for demanding residential and commercial applications. It operates on four AA batteries, supporting up to 1000 insulation tests on a single charge, making it both efficient and dependable for fieldwork.

If you need an affordable, durable, and accurate insulation tester for everyday electrical testing, the Fluke 1503 is an excellent choice.

Features

• Basic Insulation Testing – Measures from 0.01 MΩ to 2000 MΩ with two selectable voltages (500V & 1000V).
• Compact & Rugged Design – Lightweight, portable, and built for residential and commercial environments.
• Live Circuit Detection – Automatically prevents insulation tests when voltage exceeds 30V.
• Multi-Functional Measurements – Measures AC/DC voltage (up to 600V) and resistance (up to 20 kΩ).
• Low-Ohms Earth-Bond Continuity – Performs 200 mA continuity tests for accurate ground bonding verification.
• Remote Test Probe – Simplifies testing in hard-to-reach or repetitive scenarios.
• Auto-Discharge Feature – Safely releases stored capacitive energy after tests.
• Large Backlit Display – Clear, easy-to-read measurements even in dark environments.
• CAT IV 600V Safety Rating – Ensures high-level protection for electricians and technicians.
• Long Battery Life – Performs up to 1000 insulation tests on a single set of four AA batteries.

Includes

• Remote probe
• Test leads
• Test probes
• Alligator clips
• User documentation