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Innova

Innova 3340 Automotive Digital Multimeter

An auto-ranging automotive multimeter that adds RPM (with an inductive pickup), dwell, pulse width, duty cycle, frequency and temperature to the usual electrical tests, with a 15 A unfused current input.

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Innova 3340 automotive multimeter, front view with red and black test leads clipped to its blue bumpers
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Photo: Innova

Key facts

Ranging
Auto-ranging
Input impedance
10 MΩ (Innova: safe for vehicle electronics)
DC current
40 mA and 400 mA fused ranges; 15 A unfused, for 15-second tests with at least 15 minutes between them
RPM
0 to 10,000 RPM on conventional and distributorless (DIS) ignitions, including coil-on-plug, with the included inductive pickup
Automotive functions
Dwell, frequency, temperature, pulse width and duty cycle
Other functions
Min/Max and Hold buttons; low-battery indicator; auto shut-off after 10 minutes
Fuse
0.5 A/250 V (UL-listed Bussmann GMA type)

Why people pick it

  • Reads engine RPM with an inductive pickup, including coil-on-plug cars
  • Dwell, pulse width and duty cycle for ignition and injector checks
  • 10 MΩ input impedance, which Innova calls safe for vehicle electronics
  • Temperature probe, RPM clamp and case in the box

Know before you buy

  • Innova's page states no voltage range, display count, accuracy or CAT rating
  • The 15 A input is unfused and limited to 15-second tests with 15-minute rests
  • Innova's page makes no True RMS claim

Full specifications

RangingAuto-ranging
Input impedance10 MΩ (Innova: safe for vehicle electronics)
DC current40 mA and 400 mA fused ranges; 15 A unfused, for 15-second tests with at least 15 minutes between them
RPM0 to 10,000 RPM on conventional and distributorless (DIS) ignitions, including coil-on-plug, with the included inductive pickup
Automotive functionsDwell, frequency, temperature, pulse width and duty cycle
Other functionsMin/Max and Hold buttons; low-battery indicator; auto shut-off after 10 minutes
Fuse0.5 A/250 V (UL-listed Bussmann GMA type)
Power2 × AA
BuildRubber corner guards
In the boxMeter, temperature probe, inductive RPM clamp, carrying case
Warranty1 year

From manufacturer documentation, checked November 2, 2026. Spotted an error? Tell us.

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