PicoLog PT-104

The PicoLog PT-104 from Pico Technology is a 4-channel platinum resistance temperature data logger that achieves 0.001 degree C resolution and 0.015 degree C accuracy — performance that positions it among the most precise commercially available temperature measurement instruments for laboratory and industrial calibration environments. It supports Pt100 and Pt1000 RTD sensors in 2-wire, 3-wire, and 4-wire configurations, with the 4-wire connection recommended for maximum accuracy as it eliminates lead resistance errors. An additional resistance measurement mode covers two ranges (0-375 ohm calibrated and 0-10,000 ohm) for non-temperature sensor applications.

PT-104 Specifications

Feature	Specification
Temperature Resolution	0.001 °C
Temperature Accuracy	0.015 °C
Channels	4 simultaneous
RTD Sensors	Pt100, Pt1000
Wiring	2-wire, 3-wire, 4-wire
Resistance Ranges	0-375 ohm (calibrated), 0-10,000 ohm
Connectivity	USB and Ethernet
Power over Ethernet	Supported
Software	PicoLog 6 (Win/Mac/Linux)
Cloud Logging	PicoLog Cloud (free)
SDK	PicoSDK (C, Python, MATLAB, LabVIEW, C#)
Scalability	Up to 20 units per PC (80 channels)
External Power	Not required (USB or PoE powered)

Dual USB and Ethernet connectivity gives the PT-104 deployment flexibility that most temperature loggers lack. USB connection suits portable or desktop use, while Ethernet enables remote monitoring over a LAN or the internet — with Power over Ethernet (PoE) support eliminating the need for a local power supply at the measurement point. PicoLog Cloud, available as a free upgrade, adds browser-based remote access to live and historical temperature data from any device, making the PT-104 practical for unattended environmental monitoring in cleanrooms, cold chains, and process control environments.

Watch the PicoLog PT-104 introduction

The PT-104 scales from a single 4-channel unit to an 80-channel system by daisy-chaining up to 20 units on a single PC, and can integrate with up to 19 other Pico data loggers in a mixed-measurement configuration. PicoLog 6 software handles data acquisition, visualization, and export, while PicoSDK enables custom integration into MATLAB, LabVIEW, Python, C, and C# applications for automated test and monitoring systems. GSAS Micro Systems provides the PT-104 with RTD sensor selection guidance and system design support for precision temperature measurement applications across India.