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instruNet Series Direct Sensor to Data Acquisition

Item# INET-100

instruNet Series Direct Sensor to Data Acquisition INET-100 INET-100
  • High Accuracy Data Acquisition for Windows-Based Computers
  • 16 Single-Ended/8 Differential 14 Bit Analog Inputs, 8 Analog Outputs and 8 Digital I/O
  • iNET-240 USB 2.0 Controller Card
  • Direct Connect to RTD, Thermocouple, Voltage, Thermistor, Bridge and Strain Gage Sensors
  • 166 ks/sec Throughput to RAM or Disk
  • Each Channel has Independently Programmable Analog Filters, Integration Time, Voltage Range and Sample Rate
  • Programmable Digital Filters on All Channels
  • Includes Strip/Chart Software and Drivers for C, Visual Basic, and TestPoint Optional LabVIEW Drivers are available.
Number of Digital Inputs/Outputs
Number of Analog Inputs/Outputs
Quantity Price each
1-4 $1,176.00
5-9 $1,117.20
10-24 $1,093.68
25-49 $1,046.64
50-99 $1,023.12
100+ $999.60

In stock

Lead Time ( If not in Stock): 2 weeks

Product Specs

  • Differential Non-Linearity 8 non-latching inputs and 8 latching outputs at 8 bidirectional screw terminals
  • Accuracy Value ±0.4%
  • Impedance >22 M 3pf
  • Microprocessor Type Windows XP/VISTA/7
  • Settling Time 4 µs (to ±2 LSB

instruNet provides ten's of microvolts of absolute accuracy instead of ten's of millivolts, at the same cost and at the same throughput rates as typical general purpose data acquisition boards. It does this with a completely different topology where the analog electronics are close to the sensor in electrically quiet boxes outside your PC, and noisy digital electronics are left inside the computer.
The external boxes contain signal conditioning amplifiers for each channel and can directly attach to sensors such as thermocouples, thermistors, RTDs, strain gages, resistance sources, current sources and voltage sources. The box returns engineering units to your PC (e.g. °C, Volts, Amps).
At the heart of the real-time system is a PCI card (WIN XP/VISTA (32-bit)/7 (32-bit), PC-card (WIN XP/VISTA (32-bit)/7 (32-bit) or USB 2.0 (WIN XP SP2/VISTA 32-bit or 64-bit/7 32-bit or 64-bit) controller. Each controller contains a 32 bit microprocessor with 256KB of RAM that manages the external "network" of devices. All real-time tasks are off-loaded to this processor, therefore the host computer is not burdened with real-time issues.
Each instruNet iNET-100 box provides, 16 single-ended/8 differential analog inputs, 8 analog outputs and 8 digital I/O lines. The iNET-100 includes 44 screw terminals. The iNET-100B version adds 16 BNCs for analog inputs.
The controller's themselves provide 10 counter/timer channels each of which can function as a digital input bit, a digital output bit, a clock output channel or a period measurement input channel.


Distributed and Expandable
The instruNet system is ideally suited for distributed measurement and control systems. The network cable can extend up to 1000 feet. Each controller card in the PC can connect to up to 16 instruNet boxes for a total number of 256 analog inputs, 128 analog outputs and 128 digital I/O. For additional inputs, multiple controller cards can be placed in one computer with the maximum number of controller cards limited only by the number of available slots in the computer. Since each controller card has its own microprocessor, multiple cards do not place any additional burden on the computer. It should be noted that multiple instruNet boxes on a single network may degrade the maximum system throughput of 166Ks/sec.

High Current Version (HC)
The INET-100HC is similar to the INET-100, yet the voltage output channels have a higher drive capability, providing up to 15 mA of current to capacitive loads as high as 0.01µF. The INET-100 and INET-100B devices support only 4mA/.001µF voltage output drive. The INET-100HC is recommended for use with sensors that require excitation, such as strain gages, RTDs and thermistors since these sensors may exceed the current or capacitive drive limits of the INET-100 or INET-100B. The INET-100HC provides greater compatibility with sensors that have capacitive loading on the excitation lines, therefore, the HC version is recommended for all sensors requiring excitation including RTDs and thermistors. Since the HC version has a greater power demand, an external power supply must be used. The INET-312-8 can be used to power up to three INET-100HC boxes.

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