Net-PAD - External Ethernet A/D Converter

Net-PAD is an external 24-bit A/D converter communicating with a PC over Ethernet through a TCP/IP protocol. Discontinued from sale as of August 2014.

Net-PAD is an external high-resolution A/D converter for chromatography data acquisition. Net-PAD communicates with a PC over Ethernet through a TCP/IP protocol. Clarity Chromatography Station, configured with Net-PAD converter, enables users to acquire chromatography data from remote instruments without the necessity of installing additional cables. Net-PAD is compatible with any GC, HPLC, GPC, IC, CE system with a standard analog output. The Clarity Chromatography Station can handle any combination of available DataApex converters (internal PCI, external USB, and TCP/IP). Net-PAD has been discontinued from sale since 2014.



  • Cable p/n KB72
  • LAN cable p/n SK10
  • Supply adapter (6V)


Converter type 24 bit integrating, sigma - delta
Analog inputs symmetrical, mutually isolated
Number of A/D channels 2
Input range unipolar and bipolar, each channel independently 156, 1250 or 12 858 mV
Input impedance 1 MOhm
Conversion time 50 Hz rejection: 10, 20, 40, 80, and 160 ms
60 Hz rejection: 8.3, 16.7, 33.3, 66.7, and 133.3 ms
Non-linearity < 0.0007 %
Temperature dependence < 10 ppm/°C
Digital inputs 4 TTL (5 V), the first two can be controlled using the built-in opto-electronic unit (2-5 mA current)
Digital outputs 8 TTL (5V, maximum current load 30 mA), the first four are equipped also with contact relays (100 V/0.5 A)
Auxiliary ports 2x RS232 serial communication
Dimensions 133 x 105 x 21 mm (W x H x D)
External power supply 6 V/250 mA

Network Communication:

Protocol TCP/IP
IP Address configurable
Ethernet (LAN) 10Mb/sec
Connector RJ-45 (twisted pair)

Possible combinations:

  Windows 11
(64 bit)
Windows 10
(32 and 64 bit)
Windows 8.1
(32 and 64 bit)
Windows 7SP1*
Net-PAD Clarity (from 8.7) Clarity (from 6.2) Clarity (from 4.0.3) Clarity

* From Clarity 3.0 the 64-bit OS is supported.

Combinations with obsolete operating systems:

  Windows VistaSP2* Windows XPSP3 Windows 2000
Net-PAD Clarity (until 7.2) Clarity (until 7.4.1) Clarity (until 3.0)

* From Clarity 3.0 the 64-bit OS is supported.