FLIR Si2-LD Acoustic Imager

The FLIR Si2-LD is an acoustic imaging camera for detecting and quantifying compressed air and gas leaks from 0.3 to 200 m. It operates across 2 kHz to 130 kHz with a minimum detection threshold of 0.0032 l/min at 2.5 m and supports gases including air, hydrogen, CO₂, methane, natural gas, helium, argon, and ammonia. The unit integrates a 12 MP color camera, 128 GB storage, Wi-Fi connectivity, and automated cost analysis for leaks. It also includes a mechanical fault mode for detecting bearing and equipment issues.

View all models of the FLIR Si2 Series here.

Product Info Related Products

Leak Detection Range	0.3 m – 200 m
Frequency Range	2 kHz – 130 kHz
Minimum Leak Detection Threshold	0.0032 l/min at 2.5 m 0.0044 l/min at 6 m
Supported Gases	Air, hydrogen, CO₂, methane, natural gas, helium, argon, ammonia
Acoustic Sensitivity	−7 dB @ 20 kHz, 4 dB @ 35 kHz, 10 dB @ 50 kHz, 36 dB @ 80 kHz, 51 dB @ 100 kHz
Directional Resolution	1° to 0.125°
Mechanical Fault Detection	Dedicated mode with automatic filter selection for bearings and equipment faults
Optical Camera	12 MP color, 75° diagonal FoV, 8× digital zoom
Display	5 in., 1280 × 720 resistive touchscreen
Video Frame Rate	60 fps (camera), 30 fps (acoustic), 70 fps (screen)
Storage	128 GB internal SD card, USB external, unlimited cloud
Connectivity	Wi-Fi 2.4/5 GHz (802.11 b/g/n/ac), USB
File Formats	.nlz, .jpg, video (up to 5 min clips)
Operating Temperature	−10 °C to +50 °C
Humidity	0–90% RH
Ingress Protection	IP54

Detects, locates, and measures compressed air and gas leaks; including bearing fault detection, from up to 200 m (656 ft) away
Built-in measurement and cost analysis for industrial gases including ammonia, hydrogen, CO2, methane, helium, and argon
One-handed operation with automatic tuning, 8x zoom, and a 12 MP digital camera
Mechanical fault mode, automatic selection, and optimization of filters simplifies finding critical mechanical issues, such as bearing faults
Fleet management functionality for efficient tool usage and maintenance across large-scale operations