ProDAQ 6151-AA Isolated Precision Thermocouple LXI Instrument

Analog Inputs: Each channel of the ProDAQ 6151 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. Each channel is protected against overvoltage, both short-term transient spikes as well as constant DC voltages up to ±30V. 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.
Simultaneous Sampling: The ProDAQ 6151 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.
Cold Junction Compensation: One of the keys to making precise thermocouple measurements is the accuracy of the Cold Junction Compensation. The ProDAQ 6151 is equipped with a dedicated temperature sensor per channel which is measured, along with the thermocouple input, during every scan. The sensor is thermally bonded to the cold junction in order to provide the most accurate and fastest response to changes in the cold junction temperature.
Open Thermocouple Detection: Each channel is equipped with open thermocouple detection functionality. It provides immediate indication in the event of a broken thermocouple, both in software and by a LED on the instrument’s front panel.
Analog Outputs: Each channel is equipped with 2 buffered analog outputs, ranging from 0V to +10V, with a level designed to cover the required temperature range for each thermocouple.
Various Mounting Options: The ProDAQ 6151 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 6151 can also be desktop mounted using the ProDAQ 5726 Stackable Tabletop Feet Set.

  • 19”, 1U Solution for 16 Thermocouple Channels
  • Support for all common thermocouple types
  • Channel Isolation up to 300 VDC (channel to channel and channel to ground)
  • CJC Sensor per channel
  • 24-Bit Sigma Delta ADC per channel
  • Two Analog Outputs per channel, 0V to +10V
  • Simultaneous Sampling of all channels
  • Open Thermocouple Detection and Indication for all channels
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SKU: ProDAQ 6151 Category:
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Delivery and return
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Shipping Information
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Composition and care



The ProDAQ 6151 is an LXI instrument designed for 16-channel isolated precision thermocouple measurements. It supports many common thermocouple types, namely types J, K, N, C, T and E. Each channel is isolated from both the chassis and all other channels.
The ProDAQ 6151 provides an easy to use, cost effective and scalable solution for the most demanding thermocouple 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: 16
    • Isolation: 300 VDC (Channel to channel, channel to outputs and channel to chassis)
    • Isolated Analog Output: Two per Channel, ±10V, Filtered, Buffered, Short Circuit Protected
    • Noise, at Analog output: <100uVrms
    • ADC Resolution: 24-bit
    • ADC Sampling Rates: 1 to 1000 Samples per second, 1Hz Resolution
    • EMI Filtering: Yes, per channel
    • Channel Input Protection: Yes, ±30V, max. input current 10mA, max. 3A <10ms.
    • Input Impedance: ≥ 1MΩ
    • Common Mode Rejection Ratio: ≥ 80dB
    • Linearizer: In built Linearizer through software
    • Calibration: Factory calibrated. Software calibration (zero and gain)
    • Response Time: <100ms at 1kSPS
    • Input Range ability: Min and Max range configurable
    • Turn Down ratio: 20:1
  • Thermocouple Measurement
    • Thermocouple Types: J, K, N, C, T, E
    • Temperature Span:
      • Type J: -200 °C to +700 °C
      • Type K: -200 °C to +1200 °C
      • Type N: -200 °C to +1250 °C
      • Type C: 0 °C to +2300 °C
      • Type T: 0 °C to +400 °C
      • Type E: 0 °C to +700 °C
    • Temperature Accuracy:
      • Type J: ≤ ±(0.6 °C +0.05% Span) °C
      • Type K: ≤ ±(0.5 °C +0.05% Span) °C
      • Type N: ≤ ±(0.5 °C +0.05% Span) °C
      • Type C: ≤ ±(1.0 °C +0.05% Span) °C
      • Type T: ≤ ±(0.5 °C +0.05% Span) °C
      • Type E: ≤ ±(0.5 °C +0.05% Span) °C
    • Cold Junct Compensation: Per channel, accuracy ±0.5˚C
    • Temperature Stability: ≤ 50ppm/˚C
    • Open TC Detection: Yes, per channel
    • Open TC Indication: Yes, per channel, Front Panel LED and Software
    • Filtering: Low pass, 100Hz FIR filter @1kSPS, 14 taps, scales proportionally with sampling rate
  • Analog Output
    • Analog Output Voltage: 0V to +10V
    • Number of analog outputs: 2 per channel
    • Output resistance: ≤ 1Ω
  • 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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