ProDAQ 6131-AA Isolated Precision RTD input LXI Instrument

  • Analog Inputs: Each channel of the ProDAQ 6131 employs a 24-bit Sigma-Delta ADC to provide the highest possible measurement accuracy. Each channel is isolated from any other and also from the chassis, with a working isolation voltage up to 300VDC. This allows any channel not only to float to different voltage potentials but also eliminates the possibility of ground loop error. An EMI filter is included per channel to reduce the possibility of error due to high frequency conducted noise. This filter also acts as an Anti-alias filter for the Sigma-Delta ADC.
  • Excitation Current: Each channel has individual pulsed excitation current with values programmable from 0.2mA to 2mA.
  • Simultaneous Sampling: The ProDAQ 6131 has a dedicated ADC per channel. This allows for true simultaneous sampling of all channels. The scan rate can be varied from 1 S/s to 1000 S/s, with a resolution of 1Hz.
  • Analog Outputs: Each channel is equipped with 2 buffered analog outputs, ranging from 0V to +10V, with a level designed to cover the required resistance range for each RTD type.
  • Various Mounting Options: The ProDAQ 6131 comes in a 1U high unit suitable for rack mount in a standard 19” rack if used with the ProDAQ 5725 Rack-Mount kit. The ProDAQ 6131 can also be desktop mounted using the ProDAQ 5726 Stackable Tabletop Feet Set.
  • 19”, 1U solution for 32 RTD Input Channels
  • Support for Pt-100, Pt-500 and Pt-1000 devices
  • Channel Isolation up to 300 VDC (channel to channel and channel to ground)
  • 24-Bit Sigma Delta ADC per channel
  • Simultaneous Sampling of all channels
  • Two Analog Outputs per channel
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SKU: ProDAQ 6131 Category:
Delivery and return
Delivery and return
Shipping Information
Shipping Information
Composition and care
Composition and care



The ProDAQ 6131 is an LXI instrument designed for up to 32-channel isolated precision RTD measurements. It supports various types of RTDs, including Pt-100, Pt-500 and Pt-1000 and other resistive devices. Each channel is isolated from both the chassis and all other channels.
The ProDAQ 6131 provides an easy to use, cost effective and scalable solution for the most demanding resistive temperature measurement applications. As a standalone LXI instrument it can be directly connected to your network and operated either through the integrated web pages or integrated to your data acquisition application using the VISA I/O library. Measurement data can be read from the instrument or directly streamed to one or several servers. Multiple devices can be synchronized via the IEEE1588 precision time protocol. The unit is equipped with a redundant power supply and two Ethernet ports.



  • General
    • Number of signal channels: 32
    • Isolation: 300 VDC (Channel to channel, channel to outputs and channel to chassis)
    • ADC Resolution: 24-bit
    • ADC Sampling Rates, fS: 1 to 1000 Samples per second, 1Hz Resolution
    • EMI Filtering: Yes, per channel
    • Input Protection: ±30V, max. continuous input current 10 mA, max. 3A for up to 10msec
    • Input Type: RTD/resistance (Minimum span: 5Ω)
    • Common Mode Voltage: Provided by the instrument, min 0.45V, max 4.21V
    • Input Impedance: ≥ 1MΩ
    • Filter Type & Specification: Low pass, 10Hz FIR filter @1kSPS, 63 taps, scales proportionally with sampling rate
    • Noise: <100uVrms
    • Linearization: In built Linearizer through software
    • Calibration: Software calibration (zero and gain). Factory Calibrated.
    • Calibration Option: Internal/External source
    • Response Time: <100ms
  • RTD Measurement
    • RTD Types: Pt-100, Pt-500, Pt-1000
    • Excitation Currents: 0.2mA to 2mA, pulsed
    • Excitation stability (24 hrs.): ≤ 0.01%
    • Temperature Stability: ≤ 50ppm / ˚C
    • Accuracy: ≤ 0.25% FSO
  • Voltage Output
    • Output level: 0 to +10V
    • Number of Outputs: 2 per channel
    • Output Resistance: ≤ 1Ω, short circuit protected
  • Control Interface
    • Physical Interface: Two redundant network ports, 10/100/1000 Base-TX
    • Software Interface: SCPI over VXI-11 protocol (VISA), TCP/IP, Web Interface
    • Operating System Support: Windows 10
  • Environmental
    • Temperature: 5 °C to +50 °C (operational), -40 °C to +70 °C (storage only)
    • Humidity: 5% – 95% (non-condensing)
    • Size: 425 mm x 330 mm x 43.5 mm (excl. connectors)
    • Weight: 5 kg
  • Power Supply
    • Input: Two redundant inputs, 85 – 264V AC, 47 – 63 Hz each
    • Power: 40W typical



  • 5725 Rack-Mount Kit
  • 5726 Stackable Tabletop Feet Set



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