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Fluke 1503 Insulation Resistance Tester

by Fluke

Last updated Mar 29, 2026 · 2 revisions

Compact insulation tester with 500/1000V test voltages, 2000 MOhm range, live circuit detection, and CAT IV 600V safety for HVAC electrical maintenance.

Fluke 1503 Insulation Resistance Tester - by Fluke - Insulation Testers software - logo 6.3 - Good
Custom · $606 7 Features 1 Integrations
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About This Product

The Fluke 1503 is a compact insulation resistance tester offering 500V and 1000V test voltages with measurement range up to 2000 MOhm. Features automatic live circuit detection that prevents insulation testing if voltage above 30V is present, auto-discharge of capacitive voltage, and resistance measurement from 0.01 Ohm to 20 kOhm. CAT IV 600V rated for safe use on HVAC distribution systems. Weighs just 1.2 pounds with remote probe, test leads, and alligator clips included.

FSH Score Breakdown

Ease of Use
8.0
Features
7.5
Support
8.0
Value
6.5
Integrations
3.0
AI Capabilities
0.5

Customer Reviews

Features

7 features confirmed across 3categories· Showing confirmed capabilities only

Equipment & Asset Management4features

Self-Diagnostic ModeLive circuit detection prevents insulation test when voltage is above 30VRemote DiagnosticsRemote probe supportAir Quality MonitoringLive circuit detectionAlertsLive circuit detection (alerts if >30V)

Hardware Features2features

Auto ShutoffAuto power offTouchscreen DisplayBacklit display

Technician Management1feature

Electrical Measurement TrackingLo ohms/Earth-bond continuity checks

Integrations 1 across 1 category

Industry-Specific 1
Fluke Connect Native

Pricing

Model
Custom
Starting at
$606
Notes
Street price ~$606-$644 depending on retailer (MSRP ~$757). Compact handheld megohmmeter. Insulation test voltages: 500V and 1000V. Insulation resistance range: 0.1 MOhm to 2000 GOhm. AC/DC voltage measurement 0.1-600V. Continuity at 200mA. Resistance 0.01-20.00 kOhm. Remote test probe for repeated tests in inaccessible locations. Rugged palm-sized design. Used in HVAC for motor winding insulation testing, compressor insulation checks, and wire/cable integrity verification.

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