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Single-unit price: $99.00 + shipping

Campaign scheduled end date: Wed, 17 Nov 2021 19:17:00 PST

Backers icon

Backers: 57

Target icon campaign show

Target: 100

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Funded: 109

Product Details



Brand / Manufacturer

Teledyne FLIR

Product Description

Available in a limited supply, Lepton FS is a non-radiometric 160 x 120 resolution micro thermal camera module with reduced thermal sensitivity, reduced scene dynamic range, and up to 3% inoperable pixels but the lowest price ever for a factory Lepton. These units balance performance and price, enabling monitoring applications where radiometry is not required and pixel-level image information is less important than broad thermal data. With the lowest cost per pixel in the Lepton family, low power consumption, and simple integration, Lepton FS provides integrators an appropriate thermal capability for innovative thermal monitoring products in smart building automation, security, occupancy sensing, and more.

Just as we were the first place to get FLIR Lepton seven years ago, we are bringing this new Lepton to you first at a highly compelling price to make your thermal imaging application more economically viable. To celebrate, all accessory boards below are 10% off excluding the new tCam-mini Wi-Fi board.




Standard Lepton mechanical interface, electrical interface, and US-based Technical Services team.

  • 160 x 120 thermal pixel resolution
  • Low operating power – 140 mW typical and 650 mW during shutter event
  • Small 11.8 x 12.7 x 7.2 mm package


Affordable, non-radiometric thermal imagery and data.

  • -10 °C to 350 °C scene dynamic range
  • Thermal sensitivity <75 mK
  •  ≤3% inoperable pixels


Build innovative thermal monitoring solutions appropriate for heat, security, and comfort monitoring applications.

  • Home and building automation
  • Heat and occupancy sensing
  • Security and location monitoring




  • Sensor technology
    • Uncooled VOx microbolometer
  • Spectral range
    • Longwave infrared, 8 μm to 14 μm
  • Array format
    • 160 x 120, progressive scan
  • Pixel size
    • 12 μm
  • Effective frame rate 8.7 Hz (commercial application exportable)
  • Thermal sensitivity
    • <75mK NEdt
  • Operability
    • Number of non-defective pixels shall be >97% Adjacent clusters, rows, columns may contain defective pixels that are not factory corrected and unable to be corrected. 3% of operability failures allowed. Temperature compensation Automatic. Output image independent of camera temperature.
  • Non-Radiometric Performance
    • While some of the Lepton FS units may output radiometric values per pixel, the Lepton FS units are not guaranteed against any radiometric accuracy and users whom wish to use Lepton FS products for radiometric applications do so at their own risk. Teledyne FLIR and GroupGets will not support questions pertaining to calibrating Lepton FS units.
  • Non-uniformity corrections
    • Integral Shutter
  • Scene dynamic range
    • High Gain Mode: -10 to 140 degrees C typical
    • Low Gain Mode: -10 to 350 degrees C typical
  • Image optimization
    • Factory configured and fully automated
  • FOV - horizontal
    • 57°
  • FOV - diagonal
    • 71°
  • Lens Type
    • f/1.1
  • Output format
    • User-selectable 14-bit, 8-bit (AGC applied), or 24-bit RGB (AGC and colorization applied)
  • Solar protection
    • Integral



  • Input clock
    • 25-MHz nominal, CMOS IO Voltage Levels
  • Video data interface
    • Video over SPI
  • Control port
    • CCI (I2C-like), CMOS IO Voltage Levels
  • Input supply voltage
    • (nominal) 2.8 V, 1.2 V, 2.5 V to 3.1 V IO Power dissipation (Typical, room temp) Nominally 150 mW (operating), 650 mW (during shutter event), 5 mW (standby)



  • Package dimensions without socket (w x l x h)
    • 11.50 x 12.70 x 6.835 mm
  • Weight
    • 0.91 grams



  • Optimum operating temperature range
    • -10C to +65C
  • Non-operating temperature range
    • -40 C to +80 C
  • Shock
    • 1500 G @ 0.4 ms


Part Numbers 500-0771-FS1


In the News

CNX Software - $99 Lepton FS module cuts the cost of FLIR thermal cameras by half

Why GroupGets?

This is the first place to get the Lepton FS

Purchase Information

Unit Deliverable

One Teledyne FLIR Lepton FS

Unit Price


Campaign Part #



Campaign funded, scheduled end date: Wed, 17 Nov 2021 19:17:00 PST

Factory Lead Time

7 Days

Options and Add-Ons

PureThermal Mini Pro JST-SR


PureThermal Mini Pro is a hackable thermal webcam for the FLIR Lepton (2.x - 3.x, FS) LWIR camera core. It can has multiple connection options such as solder straight to the board or a custom cable using the JST-SR port. The PTMini Pro also features four mounting holes, less complex circuitry, and perhaps best of all, USB DFU. This is a development kit ready to be embedded into a production system.

Link to the connector on this board


We've been quietly working on the design for awhile and rest assured, we stuck with the same STM32F4 MCU so yours and our existing firmware will easily port. 



PureThermal Breakout Board


The PureThermal Breakout Board is an easy to interface evaluation board used to quickly evaluate the FLIR Lepton® thermal camera modules (2.x - 3.x, FS). It’s compatible with many low-cost ARM based evaluation boards, in addition it’s easy to connect to pin outs for Arduino or via short jumper wires to Raspberry Pi.


  • Compatible with Lepton 2.x and 3.x
  • Access to SPI and I2C camera module interfaces
  • Provides 25-MHz reference clock
  • Provides Power Regulation from 3.3-5V input
  • 32-pin Molex camera socket for Lepton® Module
  • PureModules compatible connector
  • VSync and Enable Pins



  • Power Inputs: 3.3-5V
  • Maximum Input Voltage: 5V
  • Lepton Core Support: Lepton 2.x and 3.x
  • Thermal Video Outputs: SPI
  • PureModules Connector: AVX: 009159010061916

PureThermal 2


PureThermal 2 is a hackable thermal webcam for the FLIR Lepton (2.x - 3.x, FS) LWIR camera core. It is the result of listening to our thousands of PureThermal 1 users and giving them what they want: four mounting holes, pads for optional EM shielding, less complex circuitry, and perhaps best of all, USB DFU. That's right, a JTAG breakout board will no longer be required to update PureThermal 2. This is a development kit ready to be embedded into a production system. 


  • STM32F412 ARM microprocessor. Execute on-board image processing without the need for an external system or SBC.
  • USB UVC works on Windows, Linux, Mac, and Android.
  • Open source reference firmware is on the GroupGets Github.
  • Open source reference image viewer software for Linux and macOS.
  • Powered by USB micro-B cable (included).
  • Device Firmware Updates (DFU) over USB.
  • Electromagnetic Shielding pads on top and bottom.



tCam-Mini - Wireless streaming thermal camera board


Cam-Mini is a small wireless streaming thermal imaging camera designed by Dan Julio to make it easy to get and use radiometric data from a Flir Lepton 3.5 sensor.  Radiometric data includes the temperature of every pixel captured by the Lepton allowing all kinds of interesting thermographic analysis.  Of course that data can also be turned into the beautiful false-color images everyone associates with thermal imaging.


  • The tCam-Mini camera exposes the full capabilities of the Lepton.
  • The camera can operate in either Radiometric/TLinear (each pixel contains temperature data) or AGC modes (no temperature data in each pixel but better images).
  • Simple json-based command set with communication of a TCP/IP Socket. Makes interfacing with the camera very simple from a custom application.
  • AP or STA (client) Wifi modes (static or DHCP-served IPV4 address).
  • Single image or streaming data modes.
  • Control over sensor emissivity, gain and spotmeter location.

The companion desktop application makes it easy to use the camera and analyze the data from it.

  • Display images or streams with multiple palettes.
  • Save and load images or streams in files preserving the radiometric data for use later or by other applications. Two file formats: image and video (described in the github repository).
  • Export images as jpg, png or tiff files.
  • Copy current image to computer's clipboard.
  • Histogram display and analysis of pixel populations.
  • Spotmeter and up to four additional markers showing temperature at various points in an image.
  • Graphing function to plot spotmeter and marker data over time.
  • Graph baseline mode to allow comparing temperatures to a reference point in the scene (for example to compare a temperature to a blackbody constant).
  • Export graph data in a text file for analysis by other programs.
  • Print graph (or create a PDF on computers that can print to PDF).

Hardware Overview

  • Espressif ESP32-WROVER-E Module (ESP32-D0WD0V3, 8 MB PSRAM, 8 MB Flash) with built-in antenna
  • Flir Lepton 3.5 (160x120 pixel radiometric LWIR camera with shutter)
  • CP2102N-A02 USB to UART bridge with ESP32 boot loader control
  • Multi-voltage power supply (3.3V, 3.0V, 2.8V, 1.2V)
  • Dual color (Red/Green) status LED
  • Factory Wifi Reset button

Open Source

The hardware and firmware design files are available in Dan's Github repository.  The firmware is designed to be compiled using Espressif IDF tools and new code can be loaded via the built-in USB Serial port. The desktop application and precompiled binary files are also available for quick download at Dan’s website.

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We are proud to support Teledyne FLIR LEPTON® FS in reaching its goal. Once the target has been reached the product will be distributed to all backers. Don't miss out on becoming a backer!

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