When you're shopping for multimeters and electrical testers, an insulation resistance tester is one of those tools where the condition of a used unit matters as much as the price. Here, two used megohmmeters sit at opposite ends of the price spectrum: the Fluke 1503 is listed at a higher price, while the Megger MJ459 comes in much lower. The listings tell two different stories, and that difference drives the decision.
Quick Verdict
If you want a used insulation tester that has been checked out, comes with its factory cables and attachments, and gives you a detailed condition report, the Fluke 1503 is the safer choice. If you want to spend less and are comfortable with a brief condition note, the Megger MJ459 is the practical pick.
Comparison
| Product | Price | Condition | Price Bar |
|---|---|---|---|
| FLUKE INSULATION RESISTANCE TESTER 1503 (P22019407 | $199.99 | Used, 93% very good, tested fully functional | |
| Megger MJ459 Insulation Resistance Tester | $59.99 | Used, good working |
Where Each Product Wins
Fluke 1503: It wins on documentation. The listing describes the unit with a thorough report that covers its condition and included accessories. For an insulation tester, missing leads can make the tool useless, so the fact that all cords, cables, connectors, and attachments are included is a real advantage.
Megger MJ459: It wins on price. It's listed below the Fluke, making it the more economical head-to-head pick. If you just need to measure insulation resistance and the basic used description is acceptable, this is the route that costs less.
Product Notes
FLUKE INSULATION RESISTANCE TESTER 1503 (P22019407
The reason to choose this unit is the level of detail. The listing says the tester has been tested and is fully functional, includes all cords, cables, connectors, and attachments as included by factory, and rates the condition at 93% very good. That makes it the easier unit to buy sight unseen, because you know exactly what you're getting. The limitation is the cosmetic side: it shows light scuffs and scratches from normal use. Those marks don't affect performance, but if you want a clean display or a pristine case, you'll have to accept some wear.
Megger MJ459 Insulation Resistance Tester
The reason to choose the Megger is its $59.99 price tag. That's the lower-cost option in this comparison, and it makes the tester accessible for occasional insulation checks or as a backup. The description says it is used and in good working order, which gives you a basic level of confidence. The limitation is the brevity of the listing: it offers less detail about included test leads, attachments, or the exact condition compared with the Fluke's write-up. You're relying more on the seller's condition note and less on a documented overview.
Final Choice by Use Case
Choose the Fluke 1503 when you need a fully vetted insulation tester with a complete kit. Choose the Megger MJ459 when you want a functional insulation tester without spending as much. It's the sensible choice for hobbyists, second testers, or anyone who values a lower upfront cost over a detailed listing.
The right call comes down to how much documentation is worth to you. If you can accept a basic used description, the Megger saves you a significant amount. If you want the reassurance of a completely described unit, the Fluke justifies its higher price.
