FLIR Si2 acoustic imaging camera features 124 microphones to detect leaks and faults up to 200 meters away

Teledyne FLIR is well known for its thermal imaging infrared cameras, but the FLIR Si2 is different as instead of measuring temperature, the acoustic imaging camera is equipped with 124 sensitive microphones to detect leaks, electrical discharge, and mechanical faults up to 200 meters away.

The acoustic imaging camera also comes with a 5-inch display and a 12MP RGB camera. It is available in three variants: the FLIR Si2-PD for partial discharge detection, the Si2-LD for air leak and mechanical fault detection, and the Si2 Pro capable of handling both.

FLIR SI2 acoustic imaging camera

FLIR Si2 specifications:

  • Display – 5-inch resistive touchscreen TFT PCB with 1280 × 720 resolution
  • Measurement and analysis
    • FLIR Si2-LD
      • Detection threshold
        • 20 kHz: -7 dB SPL
        • 35 kHz: 4 dB SPL
        • 50 kHz: 10 dB SPL
        • 80 kHz: 36 dB SPL
        • 100 kHz: 51 dB SPL
      • Supported gases: Compressed air, hydrogen, CO2, methane, natural gas, helium, argon, ammonia
      • Other acoustic analysis modes: Mechanical fault detection
    • FLIR Si2-PD – Severity Assessment – Automatic AI-based severity assessment including recommended actions onboard camera
    • Bandwidth – 2 kHz to 130 kHz
    • Range  – 0.3 m to 200 m
    • Leak Rate – 0.0032 l/min from 2.5 m, 0.0044 l/min from 6 m
  • Imaging & Optical
    • Field of view (FOV) – 75° diagonal
    • Video Frame Rate – Camera: 60 fps / Acoustic image: 30 fps / Screen: 70 fps
    • Video Image Resolution – 1280 × 720
    • Zoom – 8x Digital zoom
  • Host interfaces
    • Dual-band 802.11.b/g/n/ac WiFi 5
    • USB port
  • Misc – LEDs: three modes off, normal and bright; power button
  • Power
    • Nominal Input Voltage – 12 V DC
    • Max input – 17 V DC, 3.3 A (limited)
    • Battery
      • Li-Ion rechargeable battery pack (RRC 2054):14.4 V DC, 3.45 Ah, 49.68 Wh
      • Max output: 16.8 V DC, 5 A
      • Dimensions – 85 mm × 77 mm
      • Weight – 250 grams
    • Battery Charger – Input: 19-26 V DC, 2.8 A; Max output: 17.4 V DC, 4.8 A
  • Operating And Storage Humidity – 0-90% recommended
  • Temperature Range
    • Operating – -10°C to 50°C
    • Storage – -20°C to 70°C
  • Protection Class – IP54
FLIR SI2-PD severity assessment
Severity assessment with the FLIR SI2-PD

We are not told too much about the software, except the camera supports automatic Over The Air (OTA) firmware updates over WiFi or USB. The hardware specifications for each model look to be exactly the same, so they probably only differ by their firmware.

Most people won’t get such acoustic imaging cameras to detect water or gas leaks in their home any time soon, because the FLIR Si2 is designed and priced for the industrial market with the FLIR Si2-LD starting at $18,000, the Si2-PD goes for $19,000m and the Si2 Pro selling for a cool $25,000. More details including purchase links may be found on the product page.

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2 Replies to “FLIR Si2 acoustic imaging camera features 124 microphones to detect leaks and faults up to 200 meters away”

  1. Looks like a pretty cool technology. I guess one could also use that to record multiple conversations from far away. The directivity is impressive.

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