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A pen shaped digital circuit tester with a backlit LED display

CrysGuard 3-48V Digital Automotive Circuit Tester with LED Display and Piercing Probe

SKU CH-1H8P-8T2FT

A 3–48 V digital circuit tester with a backlit LED display and an 84-inch coiled piercing probe for cars, trucks, RVs and boats

  • Team affiliation1 Piece
  • Key featuresDigital Automotive Voltage Tester, Ul 61010-1, Iec 61010-2-0
  • Overall height8 L x 1 W x 1 H inches
  • Overall width8 L x 1 W x 1 H inches
  • Overall length8 L x 1 W x 1 H inches
  • Product weight4.5 oz
  • Tests 3 V to 48 V DC systems accurately
  • Backlit LED display shows live voltage clearly
  • Piercing probe contacts wire without stripping
  • 84 inch coiled lead reaches across engine bay
  • Weighs 4.5 ounces for easy handling

CrysGuard 3-48V Digital Circuit Tester

This CrysGuard tester measures DC voltage from 3V to 48V across automotive, marine, RV and solar systems. A sharp piercing probe penetrates insulation without damaging conductors. The 84-inch coiled spring wire reaches across engine bays and under dashboards. It suits professional mechanics, technicians and serious DIYers who need live readings during diagnostics.

LED Display and Thermal Behaviour

The backlit LED screen shows real-time voltage clearly in sunlight, garages or dark engine bays. The tool is battery powered and meets UL 61010-1 and IEC 61010-2-030 safety standards. Its insulated body withstands regular shop use. No active cooling or external power supply is required, so operation stays silent and cool during extended testing sessions.

Upgrade from Basic Test Lights

This replaces simple bulb-style test lights that only indicate presence of voltage without showing the value. The jump is worth it when you must distinguish between 12V, 24V and 48V systems, trace voltage drops across fuses or relays, or verify grounding integrity. It is not for buyers who need AC measurements, data logging or wireless connectivity.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 77% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameCrysGuard
Product typeVoltmeter
Size & build
Overall height8 L x 1 W x 1 H inches
Overall width8 L x 1 W x 1 H inches
Overall length8 L x 1 W x 1 H inches
Product weight4.5 oz
More details
Team affiliation1 Piece

Questions about this item

How do I connect the CrysGuard tester to a 12V circuit without stripping the wire?

Extend the 84-inch coiled spring wire, attach the alligator clip to a clean ground point, then press the stainless-steel piercing probe through the insulation until the LED display shows a live reading.

What part of this tester will wear out first with daily use?

The piercing probe tip dulls over time and the coiled spring wire can lose its retraction tension; both are replaceable to keep the tool accurate.

At what voltage does the LED display stop giving reliable readings during a long test session?

The tester is rated to 48V DC; sustained measurements near that upper limit can cause the display to drift or blank out before lower-voltage circuits do.

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