Compact. Powerful. Versatile.

Meet the Pacto, the next-generation photonics backbone spectrometer designed to empower a wide range of applications in various industries. The Pacto is manufactured with Avantes' newest automation techniques to ensure superior inter-instrument reproducibility. Discover how the Pacto will empower your application!

Request more info

Compact Size, Limitless Possibilities

The Pacto is a compact, lightweight, powerful spectrometer that sets a new standard in high-quality spectroscopy. With its advanced capabilities and user-friendly design, this device is the perfect solution for a wide range of applications in various industries. The Pacto is easy to integrate into a variety of products and systems. It is the ideal instrument for applications where size and flexibility are important considerations.

Request more info

Why choose Pacto?

  • Compact size
  • High speed performance
  • Measurement flexibility by changing slit size
  • Improved optical bench design
  • Smooth product or system integration
  • Signal-to-noise ratio 375:1
  • Integration time 9μ – 30s
  • Stray light as low as 0,1%
  • Manufactured with automated process
  • Improved temperature stability
  • High unit-to-unit reproducibility
  • Multiple variations available

Find your perfect match

The Pacto is available in three variations, optimized for the best performance in system integration. Customize the Pacto to match your application's needs. All variations are compatible with Avantes light sources, fibers, accessories and AvaSoft software.


  • USB communication protocol
  • Measurement flexibility (different slit sizes)
  • Versatility for demanding applications
  • Photonics backbone

Pacto Link

  • RS232/SPI communication protocol
  • High unit-to-unit reproducibility
  • Custom software libraries (DLL)
  • Optimized for (OEM) system integration

Pacto Bench Only

  • Your communication protocol
  • Automated manufacturing techniques
  • Custom software libraries (DLL)
  • Optimized for (OEM) system integration


The Pacto is suitable for a wide variety of applications and industries. Such as, but not excluded to;

Agriculture & Food

Food Sorting
Precision Agriculture


Blood Analysis
Cancer Detection


Raman & Fluorescence Spectroscopy


Contamination & Pollution Monitoring


LED calibration


Thin Film Coating
End-Point Detection

Solar Industry

Solar Panel
Quality Control

System Integration

Integrate into your
product or system


The specifications in the table relate to the USB-powered Pacto. Download the specifications of all Pacto variations in the sections below.
Pacto 2K
Pacto 4K

Optical Bench

Symmetrical Czerny-Turner design, 75 mm focal length; Pacto bench

Wavelength range

200 - 1100 nm

Stray light

0.1 - 1% (typical value 300l/mm, blaze 250nm < 0.3%)





HAM S11639, CMOS linear array, 2048 pixels (14x200 µm)

HAM S13496, CMOS linear array, 4096 pixels (7x200 µm)

Signal / Noise



Dynamic Range


Dark Noise

15 cnts

AD converter

16-bit, 6 MHz

Integration time

9 µs - 30 seconds


USB 2.0 (480Mbps) / pigtailed (38cm) USB-A

Sample speed on-board averaging

1.15 ms /scan

1.19 ms /scan

Data transfer speed

1.15 ms /scan

1.19 ms /scan

Digital I/O

5 bidirectional programmable I/O; 1 Analog out, 1 Analog in, 1x5V

Dimensions, weight

105 x 80 x 20 mm, 277,5 grams

Power supply

Default USB power, 500 mA

Temperature range

5 - 55 °C