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Signotec LCD Signature Pad Sigma

Signotec LCD Signature Pad Sigma

The Sigma Signature Pad is available with and without backlit!


The Sigma signature pad sets a new standard for electronic signature capture devices, in terms of its size and the resolution of the display. Among the device’s unique features are the outstanding display of graphics and text, the technical properties for digitising signatures, its extremely flat design and, above all, its smooth surface and a sensor that is flush with the housing. This design enables signing to be highly ergonomic. The rounded sides also allow the heel of the hand to pass fluidly from the device to the table without disrupting the signing process.

The high sensor also allows for sweeping signatures, without the user inadvertently reaching the limits of the sensor. This is vital to ensure that the signature is captured naturally and securely. Furthermore, extensive graphical and textual information can be displayed, which often plays an important role in stationary use. As a result, the pad is also an inexpensive alternative for stationary applications.

The transfer of data from the pad to the PC is encrypted, which is why it is not possible to spy on the biometric features of the signature. Since the electronics, firmware, drivers and applications have been developed by signotec itself, the hardware and software are ideally matched.

Sigma Technical Specifications


4" (10,5 cm) b/w Display with or without backlight

Active Signing Area

100 x 50 mm


160 x 120 x 10 mm


Unlimeted fonts and sizes


Any graphics up to 320 x 160 pixel


Unlimited screens, Hot-Spots (buttons) and Scroll-Function


AES-Encryption, RSA-signing. Signatures biometrics RSA-Encryption inside the pad.


USB (HID, no driver installation required)


Yes. Optinal with internal virtual USB-Seriell-Converter (FTDI)

Internal Samplingrate

6000 Hertz

External Samplingrate

500 Hertz


1040 dpi, not interpolated


No special pen, cheap replacement


Scratch resistant surface


2 Years

The signotec pads (Omega firmware 1.25, Sigma 1.16) have the highest security mechanisms. This will allow a complete chain of evidence in dispute. Depending on the integration, different techniques are used:

  • PDF documents can be signed inside the pad and not in the insecure environment of the PC.
  • The biometrics from the signature can pad RSA-encrypted inside the pad and not in the insecure environment of the PC.
  • The pad LCD-screen content with the signature can be RSA-signed inside the pad.
  • Each pad has a separate and unique RSA certificate from delivery.
  • Saving from custom RSA-certificates inside the pad.
  • The pad can generate an RSA certificate inside.
  • Supported schemes are RSA PKCS # 1 v1.5 (with or without the hash OID), PKCS # 1 v2.1
  • Certificates can be certified by a Root Authority

Supported hash algorithms are SHA-1, SHA-256 and SHA-512




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Ex: [ 080 ] [ 6987568 ]

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