Fluke 1503 Insulation Resistance Tester
£377.00 inc. VAT (£314.17 ex. VAT)
- Tests insulation resistance up to 2000 MΩ for fast fault-finding on electrical circuits.
- Selectable 500 V and 1000 V test voltages suit common installation testing tasks.
- Measures continuity down to 0.01 Ω for accurate low-resistance circuit checks.
- CAT IV 600 V safety rating supports testing at service entrances and distribution points.
Why Choose InsulResis
Uncompromising Accuracy for UK Electricians
When you need a reliable electrician insulation meter, the Fluke 1503 delivers unparalleled precision. Designed for both residential and commercial environments, this advanced digital insulation resistance meter simplifies complex troubleshooting. Whether you're conducting a routine residential wiring insulation test or a rigorous site inspection, its rugged form factor ensures it withstands the harshest site conditions without compromising on accuracy.
Advanced Safety and Live Circuit Detection
On-site safety is paramount. Featuring an integrated live circuit detection system, the Fluke 1503 automatically prevents testing if a voltage greater than 30 V is detected. This crucial safety mechanism makes it an indispensable commercial electrical tester for facilities maintenance engineers who demand strict adherence to UK health and safety standards.
The Ultimate 1000V Megger Tester Alternative
Looking for a highly capable 1000v megger tester alternative? The Fluke 1503 offers dedicated 500 V and 1000 V test ranges, seamlessly handling insulation resistance measurements up to 2000 MΩ. It's the ultimate professional choice for electrical contractors who value brand confidence, portability, and dependable, repeatable results over bulky, complicated older models.
Technical Specifications
- Test Voltages
- 500 V, 1000 V
- Insulation Test Range
- 0.1 MΩ to 2000 MΩ
- Safety Rating
- CAT IV 600 V
- Live Circuit Detection
- Inhibits test if > 30 V detected
- Battery Life
- 4x AA (Approx. 1000 tests)
- Weight
- 550 g
- Dimensions
- 203 × 100 × 50 mm
- Certification
- UKCA, CE, CSA, TUV
Price Comparison
See how our price compares across UK retailers
| Retailer | Price | Delivery | Warranty |
|---|---|---|---|
| InsulResis UKBEST | £377.00 | FREE | 12 months |
| Amazon UK | £378.00 | £4.99 | 12 months |
| eBay (est.) | £446.04 | Varies | Seller dependent |
| High Street RRP | £483.84 | N/A | Varies |
Prices checked 21 July 2026. Prices may vary.
Customer Reviews
An exceptional professional insulation tester. I bought this to replace my old Kewtech, and the dedicated 500V and 1000V ranges are spot on for my daily commercial electrical inspection work. Highly recommended.
The live circuit detection tester feature is a lifesaver. It stopped me from testing a mistakenly energised circuit on a busy site last week. A truly rugged megohmmeter that you can trust.
Needed a reliable compact insulation resistance tester next day delivery, and InsulResis sorted it perfectly. The Fluke 1503 is brilliant for tight spaces in domestic consumer units.
A very solid 1000v megger tester alternative. The build quality is fantastic, though the remote probe button takes a little bit of getting used to if you have large hands.
Perfect compact insulation resistance tester for residential wiring tests. The backlit display is incredibly clear when working in poorly lit lofts or basements.
Great piece of kit for the van. It's a fantastic digital insulation resistance meter, slightly heavier than my last one, but you can feel the premium Fluke durability.
I use this exclusively as a commercial electrical tester. The auto-discharge function and the CAT IV safety rating give me complete peace of mind on heavy industrial sites.