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Lisle 28830

Lisle 28830 Digital Circuit Tester 3-49V, whole tester with probe, coil cord and alligator clamp on a white background

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28830 tester only, as sold in the US

Type:
Digital circuit tester for vehicle electrical systems
Voltage range:
3-49 V DC
Display:
Digital LCD showing DC voltage

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Package details

Model: 28830

Condition:
Confirm new or reconditioned on the listing
Quantity:
Confirm package quantity on the listing

Important limit: DC circuits only; the maker does not state an AC voltage range

Confirm condition, quantity and included accessories on the retailer’s listing.

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Specifications checked November 5, 2026. Full product details

Lisle 28830 Digital Circuit Tester 3-49V

A heavy-duty automotive circuit tester with a digital LCD that reads DC voltage from 3 to 49 volts and shows polarity with red and green lights.

Which version should you buy?

Selected package: 28830 tester only, as sold in the US.

Selected package

  • 28830 Digital Circuit Tester 3-49V

    This page

    Model: 28830

Related models and generations

These are different products. Check their specifications separately.

  • 29050 Digital Circuit Tester 3-30V Model: 29050

    Narrower 3-30 V DC range, per Lisle's page.

    Lower-voltage systems only.

  • 27430 24V Heavy Duty Circuit Tester Model: 27430

    Analog tester for up to 28 volts, no digital display.

    Simple presence-of-power checks up to 28 V.

Purchase links appear where the exact offer is verified. Confirm the named model, quantity and accessories before ordering.

Watch out

  • 28830 reads 3-49 V DC; 29050 looks similar but tops out at 30 V.
  • 27430 and 28400 are analog needle testers, not the digital LCD model.

Why people pick it

  • Wide 3-49 V DC range covers 12, 24 and 48 V vehicle systems, including late-model 3.5 V and 5 V sensor circuits
  • Digital LCD gives an actual voltage reading instead of just a light, per Lisle's description
  • Red and green lights show polarity with 360° visibility, so the indicator is visible from any angle
  • Long 12 ft coil cord and heavy-duty alligator clamp for reaching around a vehicle

Know before you buy

  • DC circuits only; the maker does not state an AC voltage range
  • No CAT safety rating is marked; Lisle describes it as a vehicle electrical system tester, not a mains tester
  • Reads only up to 49 V, so it is not for higher-voltage systems
  • Lisle sells it direct through automotive distributors and its own store; the maker's page links no Amazon listing

Full specifications

TypeDigital circuit tester for vehicle electrical systems
Voltage range3-49 V DC
DisplayDigital LCD showing DC voltage
Polarity indication360° visibility of polarity; red light indicates positive, green indicates negative
Cord12 ft. coil cord
Ground clampHeavy-duty alligator clamp for secure connections
ProbeInsulated to prevent the possibility of shorting the side of the probe to other components
PatentUS 9,970,965
UPC083045288305
Shipping weight0.56 lb (maker's product data)

From manufacturer documentation, checked November 5, 2026. Spotted an error? Tell us.

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