Colour LCD Signature Pad Gamma coming soon
Colour LCD Signature Pad Gamma coming soongamma standby display frontLCD Signature Pad Gammagamma website seite
  • Signature Pad Gamma

    Description of the signature pad "Gamma" by signotec with a colour TFT screen.
  • Short Summary :

  • The ultra-flat Gamma

    LCD signature pad

    is an exceptionally compact device with dimension of only 160 x 172 x 10 mm and sets new standards in terms of design and functionality. The device charms with an curved shape with an excellent combination of pen and penholder that tilts favourably towards the signee. The unconventional sensor surface made of hardened special glass with ER technology and high resolution with full colour display guarantees the excellent quality and accurate signature capturing on the pad. A device with remarkable design that is persuasive in both appearance and activity.

The LCD

Signature Pad

"Gamma" is the fourth electronic signature pad manufactured for capturing handwritten signatures in digitised form. This device was developed independently and combines 15 years of development, experience and competence. It is a very compact device with it external dimension being 145 x 167 x 10 mm and sets new standards in design and functionality. Gamma LCD Signature Pad has an architecture that makes it an ideal product for customers working in robust environment.

The ultra-flat Signature Pad is convincing with its innovative sensor surface made of special toughened glass with ER-Technology. It has a high resolution full-colour display that makes he excellent display of graphic and text information possible. The device comes with a combination of a special pena and the sensor gives an experience similar to writing on a paper. This gaurantees outstanding quality of the signature; with the particularity, that even movements of the pen in mid-air can be captured. The special battery-less pen has exchangeable tips and can capture 1024 pressure stages. Gamma's manufacturing ensures an extremely long service life of 30million signatures and excellect durability with the strong safety.

Gamma LCD Signature Pad also comes with an outstanding security feature like internal encryption of the biometric data via Public-Key inside it, just like Sigma, Omega and Alpha pads. The encrypted data transfers from Pad to PC via RSA. The procedures for the certificate-based signature of the e-document in the pad are unique. Thus, spying on the biometric data is just impossible. Due to the independent manufacturing of electronics, firmware, driver and applications this device has an ideal coordination between software and hardware.

Gamma demonstrates the cutting-edge quality characteristics of the signotec products. Moreover, with the impressive integration capacity and the security of investments, signotec is soaring to new heights. For the first time, all kinds of USB-connection methods of the signotec pads are available in one device; HID-USB, WIN-USB and virtual COM-Port; you can choose between all connection methods. For example, today the device can be easily connected to a PC via fast WIN-USB and tomorrow to a Linux-Thin-Client via VCOM or the other way round. The virtual COM-Port guarantees customers the highest possible investment protection, because they can switch the pad easily to USB at a later time, which is now possible due to the internal USB-switch.

Display 5" (12,5 cm) TFT-Display with 16,8 Mio. colours
Active signing area 108 x 65 mm
Dimensions 10 x 172 x 160 mm
Text display All fonts and sizes
Graphic display All graphics up to 800 x 480 Pixel
Memory Internal memory for 10 images, which can be used for static content (quick rotation between diffrent pages) and slideshows
Navigation Unlimited number of screens and Hot-Spots (buttons). Scroll function
Security AES-encryption, RSA-encryption of the  biometric data inside the pad
Connection HID-USB 2.0. Fullspeed (12 MBit/s) and WinUSB Highspeed (460 Mbit/s), optional virtual COM-Port
Terminalserver Yes. Version with int. virt. USB to serial converter (FTDI)
External sampling rate 280 Hertz
Resolution 2400 x 2909 ppi, not interpolated
Pen Battery-free pen with exchangeable tip
Sensor Hardened sensor glas surface with ER-Technology
Warranty 2 years
The signotec pads have the highest security mechanisms available. This allows 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 biometric data of the signature can be RSA-encrypted inside the pad using a public key.
  • RSA-signature of the displayed content and signature.
  • Upon delivery, each pad has a separate and unique RSA certificate for signing.
  • Storing of custom RSA-certificates inside the pad.
  • The pad can generate a RSA certificate.
  • 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.

For details please refer to the documentation.

Astral strives to bring the best digital signature experience to our customers around the world through its innovative hardware and software.

Astral welcomes your feedback on its products.

German Design Award 2016

The signature pad Gamma has been awarded with the well-respected German Design Award 2016 in the category: “Excellent Product Design – Computer and Communication”.
Excellent Product Design – Computer and Communication

"The ultra-flat Gamma LCD

signature pad

is an exceptionally compact device with dimension of only 160 x 172 x 10 mm and sets new standards in terms of design and functionality. The device charms with an curved shape with an excellent combination of pen and penholder that tilts favourably towards the signee. The unconventional sensor surface made of hardened special glass with ER technology and high resolution with full colour display guarantees the excellent quality and accurate signature capturing on the pad. A device with remarkable design that is persuasive in both appearance and activity."

The German Design Award is awarded by the German Design Council that is Germany’s leading brand and design authority. Its mission is to present the latest developments on the German design scene. Established in 1953 as a foundation on the initiative of the German Bundestag. The foundation supports the economy consistently achieving brand value through design. This makes the German Design Council one of the world’s leading competence centres for communication and brand management in the field of design. In addition to business associations and institutions, the exclusive network of foundation members includes, in particular, the owners and brand managers of many well-known companies.


The pad comes with a free of charge software package consisting of the signo PAD-API signoIntegrator, signoImager and MS Office AddIn which are available in the download area.

Recommendation: A useful addition for signing of PDF documents is signoSign/2.

Excellent Product Design – Computer and Communication
Made In Germany
  • Self-sufficient slide show with up to 10 graphics
  • Including free of charge software packages incl. SDK for several programming languages
  • Unique RSA-signature creation device and RSA-encryption methods inside the pad
  • "Content Signing" allows to directly sign the content displayed on the LCD, to assure to sign the correct document
  • Secure mode for real time display
  • Several options for secure certificate and key management inside the pad
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