Microlink - Model 752-RTD -Resistance Temperature Measurement USB Unit

• Measure temperature using RTDs or Pt100 sensors, and voltage signals
• Switch digital outputs
• Monitor digital inputs
• Count events
• With extra hardware monitor thermocouples and strain gauge bridges
• Control voltage or current outputs
• Includes the powerful yet easy-to-use Windmill software for Windows: no programming required
• Connect up to 8 USB units to one PC
• Choice of analogue input ranges, selected with Windmill software individually for each channel
• Alternatively, choose automatic ranging and let the software match the input signal as closely as possible
• Integrating analogue-to-digital converter reduces electrical noise
• Use Windmill to select the resolution of the A-D converter from 12- to 18-bits
• Automatic recalibration
• Comprehensive User Manual
• Free technical support for life

Resistance temperature devices (or detectors) rely on the principle that the resistance of a metal increases with temperature. When made of platinum, they may be known as platinum resistance thermometers (PRTs), and when specified to have a resistance of 100 ohm at 0 oC, as Pt100.

Resistance measurements are made by passing a constant, known, current through the unknown resistance, and monitoring the voltage drop across the resistance. The 752 unit provides a constant current source of 1 milliamp. This gives excellent results for all wiring configurations, including 2 wire, 3 wire, 4 wire and 4 wire compensated. The most accurate results are obtained using a 4 wire arrangement.