The FLIR Si124-PD acoustic imaging camera can help you detect partial discharge from high-voltage electrical systems up to 10 times faster than traditional methods. Built with 124 microphones, this lightweight, one-handed solution produces a precise acoustic image that visually displays ultrasonic information, even in loud industrial environments. The acoustic image is transposed in real time on top of a digital camera picture, which allows you to accurately pinpoint the source of the sound. The Si124-PD features a plugin that enables users to import acoustic images to FLIR Thermal Studio suite for offline editing, analysis, and advanced report creation. Field analysis and reporting can also be done using the FLIR Acoustic Camera Viewer cloud service. Through a regular maintenance routine, the FLIR Si124-PD can help facilities save money on utility bills.
Available in additional models which include a cordless battery option: the Si124-LD for leak-detection applications, or the Si124 for both electric utility and leak-detection applications. View the models in the related products section below.


  • Acoustic Measurement


    124 low-noise MEMS microphones, real-time sound visualization

    Discharge Classification


    • Negative corona • Positive and negative corona • Floating discharge • Surface or internal discharge PRPD pattern provided in FLIR Acoustic Camera Viewer cloud service.

    Severity Assessment

    Automatic AI-based severity assessment including recommended actions


    from 0.3 m (1.0 ft) up to 130 m (430 ft)

    Wireless Data Transfer


    Wi-Fi 2.4 GHz and 5 GHz IEEE 802.11.b/g/n/ac wireless LAN

    Camera software update

    Automatic over Wi-Fi
    USB via computer

    Dynamic Range

    Low limit: <-15 dB
    High limit: >120 dB

    Field of view (FOV)

    62° × 49°

    Frame Rate


    Video: 25 fps
    Acoustic image: 30 fps

    Video Image Resolution

    800 × 480



    2x digital zoom


    Acoustic Measurement


    124 low-noise MEMS microphones, real-time sound visualization


    2 kHz to 65 kHz, adjustable range MEMS sampling frequency: 130 kHz

    Discharge Detection

    Automatic detection 50 / 60 Hz


    Size: 5 in. 800 × 480
    Color: 24 bit RGB
    Brightness: 1000 cd/m² (adjustable)