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Finally, an easy way to detect, locate and analyze partial discharge in one tool

Tired of spending too much time detecting partial discharge? Introducing the ii910 Precision Acoustic Imager, engineered to locate partial discharge, corona discharge as well as gas and vacuum leaks. The ii910 acoustic imaging camera's groundbreaking technology is a cost efficient, safe, effective, and comfortable tool for teams who inspect and maintain power distribution and industrial high voltage equipment.

The invisible threat….now you can see

Partial discharge is a serious issue that teams monitor everyday. Whether you are scanning insulators, transformers, switch gears or high voltage powerlines you need to be sure that you spot a problem quickly and early. Partial discharge that goes unchecked can cause blackouts, fires, explosions, or death from arc flashes. In addition to the danger that this can pose to the environment and human lives, it also has a very steep price tag. Having equipment go down can cost millions of dollars per hour and studies have shown that a single data center outage could cost as much as $8,851 per minute. On top of this, the Department of Energy estimated that outages cost the US economy $150 billion annually.

  • Key features
  • Quick and easy partial discharge detection and PD testing
  • Reduce outages and increase uptime
  • Cut costs and save energy everyday by finding and fixing PD
  • PDQ Mode to capture and analyze partial discharge



Frequency band

2 kHz to 100 kHz

Detection range

0.5 to > 120 meters (1.6 to > 393 feet)*

Field of View

63 ° ± 5 °

Nominal frame rate

25 FPS

*Depending on ambient conditions


Built-in digital camera (visible light)

Field of View (FOV)

63 ° ± 5 °


Fixed lens




7" LCD with backlight, under-sunlight readable


1280 x 800 (1,024,000 pixels)



Acoustic image

Yes, SoundMap™ image


Image storage

Storage capacity

Internal memory with the capacity for 999 picture files and 20 video files

Image format

Blended visual and SoundMap™.JPG or .PNG

Video format

Blended visual and SoundMap™.MP4

Video length

5 minutes maximum

Digital export

USB-C for data transfer


Acoustic Measurements

Measurement range

12.1 dB SPL to 114.6 dB SPL ±1 dB SPL 2 kHz
4.4 dB SPL to 101.2 dB SPL ±2 dB SPL 19 kHz
12.8 dB SPL to 119.2 dB SPL ±1 dB SPL 35 kHz
19.8 dB SPL to 116.1 dB SPL ±3 dB SPL 52 kHz
41.4 dB SPL to 129.0 dB SPL ±1 dB SPL 80 kHz
54.4 dB SPL to 135.5 dB SPL ±1 dB SPL 100 kHz

Auto max/min dB gain

Auto or manual, user selectable

Frequency band selection

User selectable through user-made presets or manual entry



Ease of use

Intuitive user interface

Trend graphs

Frequency and dB scale

Spot markers

dB level reading at center point of the image



Batteries (field-replaceable, rechargeable)

2 x Rechargeable Li-ion, Fluke BP291

Battery life

6 hours/battery (product includes spare battery)

Battery charging time

3 hours

Battery charging system

External dual-bay charger, EDBC 290


General Specifications

Standard palettes

3: Grayscale, Ironbow, Blue-Red

Operating temperature

0 °C to 40 °C (32 °F to 104 °F)

Storage temperature

-20 °C to 70 °C (-4 °F to 158 °F) Without batteries

Relative humidity

10 % to 95 % non-condensing

Size (H x W x L)

186 x 322  x 68 mm (7.3 x 12.7 x 2.7 inches)

Weight (battery included)

1.7 kg (3.75 pounds)

Ingress Protection (IP)

IP40 protection against particles 1mm or greater and dripping water


2 year

Self-diagnostic notification

Array-health test to identify when microphone array needs attention

Supported languages

Dutch, English, Finish, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese

RoHS compliant




General safety

IEC 61010-1

Electromagnetic Compatibility (EMC) International

IEC 61326-1: Portable Electromagnetic Environment IEC 61326-2-2
CISPR 11: Group 1, Class A

Korea (KCC)

Class A Equipment (Industrial Broadcasting & Communication)


47 CFR 15 subpart B. This product is considered an exempt device per clause 15.103.


Models: Fluke ii910 Precision Acoustic Imager


ii910 Precision Acoustic Imager


  • Imager
  • AC power supply and battery pack charger (including universal AC adapters)
  • Two rugged lithium ion smart battery packs
  • USB cable
  • Rugged, hard carrying case
  • Adjustable hand strap and neck strap