
Optimised for detecting compressed air and vacuum leaks, the FLIR Si1-LD Acoustic Imaging Camera is a lightweight, ergonomic ultrasonic camera equipped with 96 MEMS microphones, a 2kHz to 100kHz frequency range, a bandpass filter, noise suppression technology, and a 12MP digital camera. It functions by detecting ultrasonic noise emitted by compressed air and vacuum leaks and converting this into a sound map that is overlaid onto the corresponding digital image. Consequently, maintenance engineers can pinpoint problems precisely, quickly, and easily. Additionally, a Leak Analysis function calculates the leak rate and leak cost per year. This quantification enables teams to make informed, data-driven decisions about prioritising repairs. Moreover, images may be transferred from the camera to FLIR’s Thermal Studio Suite Software, via a memory stick or USB cable, for offline editing, analysis, and reporting.
There are two versions of the FLIR Si1-LD Acoustic Imaging Camera available: one with Wi-Fi and one without Wi-Fi.

Wi-Fi-enabled models may be used with the FLIR Acoustic Camera Viewer App which facilitates online, in-the-field analysis and reporting.
Highly sensitive, extremely efficient, and very easy to use, the FLIR Si1-LD Acoustic Camera can help industrial plants reduce their carbon footprint and energy bills.
12MP digital camera
Buy a FLIR Si Series Acoustic Imager and Get a FREE FLIR Reward
Receive a FREE FLIR Tool when you buy a FLIR Si Series Acoustic Imaging Camera between 9th November - 31st December 2025.
Email your proof of purchase to flir_acoustic@teledyne.com to get your 100% discount code to redeem against a new FLIR product. Choose from a Flir C5, Flir Edge Pro, CM57-2 Clamp or a DM93-2 DMM.
For more details visit FLIR Rewards
| Measurement & Analysis | |
| Measurement & Analysis | 96 low-noise MEMS microphones, real-time sound visualization |
| Detection threshold | 20 kHz: −5 dB 35 kHz: 9 dB 50 kHz: 15 dB 80 kHz: 41 dB 100 kHz: 56 dB |
| Bandwidth | 2 kHz to 100 kHz |
| Directional resolution | From 1° up to 0.125° |
| Operating distance | From 0.3 m (1.0 ft) up to 130 m (427 ft) |
| Auto distance | Automatic distance up to 5 m (16.45 ft) |
| Leak localization and detection | Automatic leak recognition including estimated leak size and annual cost |
| Leak rate detection threshold | 0.5 m: 0.004 l/min 2.5 m: 0.010 l/min 6.0 m: 0.017 l/min |
| Autofilter, automatic frequency selection | No |
| Band-pass filter | Yes |
| Supported gases | Compressed air |
| Mechanical mode | No |
| Imaging & Optical | |
| Digital camera | 12 MP color |
| Camera field of view | 65° diagonal |
| Video frame rate | Camera: 60 fps / Acoustic image: 30 fps / Screen: 70 fps |
| Zoom | 8x Digital zoom |
| Video image resolution | 1280 × 720 |
| User Interface | |
| Display | Size: 5 in. 1280 × 720, Resistive touch screen, TFT LCD, MIPI DSI |
| Integrated flashlight | LEDs, two modes: ON / OFF |
| Analysis & Reporting | |
| Online | FLIR Acoustic Viewer (cloud service) https://acousticviewer.flir.com |
| Offline | FLIR Thermal Studio (desktop software) |
| Communication & Data Storage | |
| Data transfer | - Wi-Fi 2.4 GHz and 5 GHz IEEE 802.11.b/g/n/ac wireless LAN - USB memory stick |
| Camera software update | - Automatic over Wi-Fi - USB via computer |
| Still image format | .nlz and .jpg |
| Video recording & format | Up to 5 minutes (.nlz format) |
| Storage, internal | 32 GB (SD card) |
| Storage, external | 8 GB (USB), Cloud storage capacity is unlimited |
| Image annotations | Image tags and comments |
| Power | |
| Camera power input | 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 Usage: Up to 2.5 h Charge time: approx. 2 h Max output: 16.8 V DC, 5 A |
| Battery charger | Input: 19 V to 26 V DC, 2.8 A Max output: 17.4 V DC, 4.8 A |
| Environmental Data | |
| Operating temperature range | −10°C to 50°C (14°F to 122°F) |
| Storage temperature range | −20°C to 50°C (−4°F to 122°F) max −20°C to 25°C (−4°F to 77°F) recommended |
| Relative humidity | 0% to 90% recommended |
| EMC | CFR47 FCC Part 15 Subpart B |
| Radio | CFR47 FCC Part 15 Subpart C/E, ETSI EN 301 489-1/-17, ETSI EN 300 328, ETSI EN 301 893 |
| Ingress protection | IP54 |
| Safety | IEC 62368-1 |
| Declaration of conformity | See: https://support.flir.com/resources/DoC |
| Physical Data | |
| Camera size | 184 mm x 276 mm x 167 mm (7 in x 11 in x 6 in) |
| Camera weight | ~ 1.2 kg |
| Battery size | 85 mm × 77 mm (RRC2504) |
| Battery weight | ~ 0.25 kg |
| Total weight (camera + battery) |
~ 1.45 kg |
| Warranty & Service | |
| Warranty | https://www.flir.com/warranty/ |