Reliable data logging is essential when engineers and technicians need to capture voltage, temperature, humidity, pulse, and logic signals in one compact platform. The GRAPHTEC GL260 is designed as a wireless LAN and high-performance data logger with all-channel isolated input, universal measurement capability, and improved standalone usability for field and laboratory applications. GRAPHTEC highlights the GL260 as a multi-channel logger that supports flexible measurement, remote monitoring, and long-duration recording in a compact instrument.
One of the biggest strengths of the GL260 is its all-channel isolated, universal input architecture. GRAPHTEC states that users can select voltage, temperature, and humidity for each input channel, with support for 10 analog input channels on the main unit. The voltage measurement range extends from 20 mV to 100 V, while temperature measurement supports a wide range of thermocouple types including K, J, E, T, R, S, B, N, and C (WRe5-26). This makes the GL260 a flexible choice for users who need one logger to handle multiple sensor types and test conditions.
The GL260 also supports additional measurement and monitoring functions beyond basic analog logging. GRAPHTEC notes that 4 to 20 mA current measurement can be handled by using an optional 250 ohm shunt resistor, and humidity measurement is available with an optional humidity sensor powered directly from the main unit. The logger also supports logic and pulse inputs on 4 channels, including logic detection through no-voltage contact, open collector, or voltage input, as well as pulse measurement modes for rotation count, quantity count, and instantaneous measurement. This broad input flexibility makes the GL260 suitable for mixed measurement tasks in maintenance, equipment testing, and process monitoring.
Another important advantage is the optional wireless capability. GRAPHTEC states that the optional wireless LAN unit B-568 enables wireless communication with PCs and smart devices and allows both direct connection through access point mode and router-based connection in station mode. Depending on the environment, users can check data and receive emails from remote PCs and smart devices through the internet. GRAPHTEC also offers the G-REMOTE service, which allows remote control and data capture through a web browser from anywhere with an internet connection, along with cloud backup of recorded data to a dedicated server. For users who need remote visibility instead of only local logging, this adds strong practical value.
Sampling performance is another major benefit of the GL260. GRAPHTEC states that a maximum sampling interval of up to 10 ms is achievable when limiting the number of channels in use. The product page shows that 10 ms sampling is available with 1 channel, 20 ms with 2 channels, 50 ms with 5 channels, and 100 ms with 10 channels for voltage measurement. This gives users flexibility to trade off channel count and capture speed depending on whether the priority is faster event detection or broader multi-channel coverage.
The GL260 is also designed for long-term recording. GRAPHTEC specifies built-in 8 GB flash memory along with support for SDHC cards up to 32 GB, and provides recording duration examples for both GBD and CSV formats. The product page indicates that with a 2 GB file size, users can record for about 41 days at 10 ms in GBD format, 88 days at 50 ms, and over 365 days at 500 ms, 1 second, and 10 seconds. In CSV format, recording durations are shorter but still substantial, such as about 91 days at 500 ms and 182 days at 1 second. This makes the GL260 a practical tool for both shorter high-speed capture and long-duration monitoring.
GRAPHTEC also includes several memory management features that improve reliability in real-world logging work. The ring capture function saves the most recent data when memory is set to ring mode, with the number of captured points ranging from 1,000 to 2,000,000. The relay capture function continuously saves data to multiple files up to 2 GB without data loss until recording stops. In addition, the memory loop function automatically deletes the oldest file before storage runs out, helping maintain continuous operation for long-term unattended logging. These features are especially valuable for users who need ongoing capture without frequent manual intervention.
Another practical feature is removable storage handling and backup support. GRAPHTEC states that the SD memory card can be hot-swapped during data capture when the sampling interval is 100 ms or slower. The logger can also create backup files periodically and automatically transfer them to another storage device on the unit or to an FTP server on the network, with backup intervals of 1, 2, 6, 12, or 24 hours. Data can be stored in GBD or CSV format for this backup function, subject to certain firmware and sampling conditions. For users concerned with data redundancy and long-term unattended recording, this is an important strength.
Data integrity is another area where the GL260 stands out. GRAPHTEC includes a data file verification function that checks the integrity of recorded data by comparing a generated checksum with the checksum stored in the file. If the two checksums do not match, the file may have been corrupted or altered. GRAPHTEC notes that this checksum-based verification is available for files created in GBD format, including files made through backup, ring, or relay recording. This helps users maintain confidence in recorded measurement data, especially in quality-sensitive or traceability-focused applications.
The GL260 also includes useful alarm and I/O functions. GRAPHTEC states that alarm conditions can be set for each input channel, and alarm signals can be output from outputs 1 to 4 when an alarm event occurs. The unit also supports trigger-based start and stop conditions using measured signals, alarms, external signals, clock settings, weekday, or time. Combined with logic and pulse inputs, this makes the GL260 more than a passive recorder. It becomes a more capable monitoring tool for systems where event-based capture and alarm notification are important.
From a hardware and usability standpoint, the GL260 is built as a true standalone logger. GRAPHTEC lists a 4.3-inch TFT color LCD with 480 × 272 resolution, USB high-speed interface to PC, optional WLAN support, and operating conditions of 0 to 45 degrees Celsius and 5 to 85 percent RH non-condensing. Power can be supplied through the included 100 to 240 V AC adapter, an optional 8.5 to 24 V DC input cable, or an optional battery pack B-573, giving users three types of power source as noted in the feature list. This flexibility helps the GL260 fit into field testing, mobile logging, and laboratory bench use.
Software support also adds to the value of the platform. GRAPHTEC lists GL28-APS application software for setting, recording, and managing captured data from a PC, and GL-Connection software for managing recording data through LAN or USB. Combined with improved web server functionality and simplified waveform setup noted on the product page, the GL260 is positioned as a data logger that supports both standalone use and PC-connected workflows, depending on how the user prefers to manage acquisition and data review.
Overall, the GRAPHTEC GL260 is a strong solution for users who need a compact, isolated, and flexible multi-channel data logger for mixed-signal monitoring. With 10 analog channels, universal input, 10 ms high-speed capture under limited-channel conditions, built-in 8 GB memory, SD card support, wireless LAN option, remote access capability, and multiple long-term recording functions, it offers a practical combination of portability, flexibility, and data security for industrial testing, maintenance, environmental measurement, and laboratory work.
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