Cookies on the OMEGA websites
We use cookies on this website, these cookies are essential for the website to work correctly.If you continue without changing your settings, we'll assume that you are happy to receive all cookies on this website.To find out more information about these cookies please click here.
Basket  |  Contact  |  Help  | 
Free Phone 0800 488 488
International+44(0) 161 777 6611
Layer N Banner

4-Channel RTD Input Data Acquisition system with USB or Ethernet Interface


Pt100 data logger | PT-104A

Pt100 data logger

£718.41 PT-104A

  • Measures Temperature (RTDs), Resistance and Voltage
  • High Accuracy (0.01°C) and Resolution (0.001°C)
  • Powered by USB Port or Power-Over-Ethernet (PoE)
  • For Use with 2, 3 and 4-Wire Pt100 and Pt1000 RTD Sensors
USB, RS232, RS485 and Ethernet Data Acquisition Systems - View related products


More information about how Data Acquisition works in this link.

The PT-104A is a four-channel, high-resolution temperature data acquisition module for use with PT100 and PT1000 RTD sensors. It can also be used to measure resistance (375 Ω and 10,000 Ω ranges) and voltage (115 mV or 2.5 V ranges). In PT100/PT1000/ resistance mode, the unit uses a four wire circuit. In voltage mode, the input connector can be treated as a differential input with ground, or two single-ended inputs. Both inputs must be 0V or above, though it does not matter which input has the higher voltage.

Although accurate temperature sensors are widely available, it has been difficult to take advantage of them due to errors caused by the measuring device. The PT-104A, however, is designed to be inherently accurate. Rather than relying on voltage references (which tend to be temperature sensitive) it uses ‘reference’ resistors which are extremely stable (low temperature coefficient and drift). The exact value of each resistor is stored in an EEPROM to provide the ultimate in accuracy (yearly re-calibration is recommended). To achieve the 0.001°C resolution a highly advanced ADC is used that can resolve to better than 1 part in 16 million.

The PT-104A measures temperature using platinum resistance temperature sensors (RTDs). Both common industry standards (PT100 and PT1000) are supported. The unit is compatible with 2, 3 and 4 wire sensors (4 wire PT100 sensors are recommended for accurate measurements).

When measuring resistance, the unit uses a four-wire circuit to give the greatest possible accuracy. Two resistance ranges are available (0 to 375 Ω and 0 to 10,000 Ω). The unit is calibrated for 0 to 375 Ω so this range should be used for accurate measurements.

For voltage measurements, each input connector can be treated as a differential input with ground, or two single-ended inputs. Both inputs must be zero volts or above, though it does not matter which input has the higher voltage. Two voltage ranges are available (0 to 115 mV and 0 to 2500 mV). For the most accurate measurements use the 0 to 2500 mV range. For the 115 mV voltage range, the accuracy may vary by 2%, and the temperature coefficient will be 100 ppm/°C.

Remote Data Collection
The new USB/Ethernet interface allows the device to be used in a variety of situations: USB-only, USB powered with Ethernet data, and Ethernet data with Power-over-Ethernet (PoE). Using the Ethernet interface, the PT-104A can be located anywhere on a LAN or on the internet.

Power over Ethernet (PoE)
The PT-104A can obtain its power from the Ethernet port as a Powered Device (PD) according to the PoE standard. To use this feature, you must connect the unit to Power Sourcing Equipment (PSE) such as a network switch, router or power injector that also supports the PoE standard. Any standard Ethernet cable up to 100 metres in length can be used.

The PT-104A is supplied with Windows Logging and Player Software. The software will automatically detect which sensor is connected and will display readings in the correct units. Also supplied is a software development kit (SDK). The SDK contains a range of software drivers and example code that you can use to write your own software or to use your PT-104A device with third party software. With the included Logging Software you can set the sampling interval from 1 second to several hours and set the maximum number of readings. You can also tell the PT-104A data acquisition module what do to when the temperature readings have been taken—either: stop; repeat immediately (start again); scroll (oldest recordings disappear); or repeat after delay (where the delay is set by the user). Multiple PT-104A modules can be used simultaneously with the logging software. Also, PT-104A modules can be mixed with TC-08 thermocouple input modules and used at the same time. Up to 20 units of any kind (PT-104A or TC-08) can be connected.Using the PT-104A logging software, data can be viewed in a spreadsheet and/or in a graph as it is being recorded. Data collected from previous recordings can also be viewed using the Player.

Place Order(Specify Model Number)

What Other People Bought: When you see this icon, click on it to expand a list of products that other people have bought when they purchased this model.

Part Number/ Desc.
Availability: In Stock
4-channel RTD input data acquisition module
All amounts shown in EUR, GBP, or USD
Note: Includes USB cable, Ethernet patch cable, 4 mating mini DIN screw terminal connectors, quick start guide, Windows software and complete operator’s manual on CD.

Product Manuals:

Download PT-104 - RTD Data Acquisition Module
Download PT-104A and TC-08 - Logging Software Modules
Download PT-104 - RTD Data Acquisition Module Quick Start Guide
We noticed you are from the US. Visit your local site for regional offers and live support.