omni instruments | sensors and data acquisition equipment

Sales & Technical Support

Need Help?

Graphtec Data Loggers

GL260 Data Logger

GL260 Midi Logger

The Graphtec GL260 is an ultra-compact, standalone data logger equipped with 10 fully isolated multi-function channels designed to measure voltage, temperature, humidity, logic, and pulse signals simultaneously. Operating with a high-resolution 4.3-inch colour TFT display and an upgraded 8 GB internal flash memory, it provides precise data acquisition directly in the field without requiring a PC connection. The instrument functions fundamentally as a rugged, grab-and-go diagnostic tool that protects sensitive inputs from ground loops and channel-to-channel signal interference.

What the GL260 offers that similar products don’t is its exceptional balance of absolute galvanic isolation and localised processing power in a palm-sized form factor. While most compact loggers compromise on safety by sharing grounds across channels or require external memory expansion to function, the GL260 delivers 10 completely isolated channels and integrated ring-memory logging natively, ensuring secure and continuous data capture even in high-noise electrical environments.

Features

  • 10 Fully Isolated Channels: Prevents catastrophic ground loops and channel-to-channel cross-talk, allowing safe, concurrent tracking of mixed signals.
  • Multi-Function Inputs: Accommodates voltage, humidity, and a wide array of thermocouple types directly on the same screw-terminal block without requiring separate input modules.
  • Enhanced 8 GB Internal Storage: Provides massive built-in capacity for long-term data logging, eliminating the absolute necessity of external SD cards for standard field operations.
  • Fast 10 ms Sampling Rate: Delivers high-speed scanning intervals down to 10 ms for a single channel, allowing accurate tracing of rapid DC voltage fluctuations.
  • Wireless Network Expandability: Supports an optional SD-card slot Wireless LAN module (B-568) to enable remote web browser monitoring, FTP data transfers, and seamless cloud connectivity.

Technical Specifications

  • Analogue Channels: 10 isolated channels
  • Input Terminal Types: M3 screw terminals
  • A/D Resolution: 16-bit
  • Sampling Interval: 10 ms to 1 hour (10 ms to 50 ms limits channel count)
  • Core Operating Ranges: Voltage: 20 mV to 100 V DC Full Scale
  • Temperature: Thermocouples K, J, E, T, R, S, B, N, C
  • Humidity: 0% to 100% RH (requires optional B-530 sensor)
  • Accuracy/Tolerances: Voltage: ±0.1% of Full Scale
  • Temperature: Thermocouple dependent (e.g., Type K: ±0.1% of reading + 1.5°C)
  • Output/Input Types: 4-channel Logic/Pulse inputs, 4-channel Open-Collector Alarm outputs, 1 Trigger input
  • Electrical/Power Needs: 100 V to 240 V AC (via supplied adapter), 8.5 V to 24 V DC, or via optional rechargeable battery pack (B-569)
  • Enclosure/Physical Protection Ratings: Compact portable chassis; Vibration resistance equivalent to Automobile Parts Type 1 Class A
  • Display Specifications: 4.3-inch TFT colour LCD (WQVGA: 480 x 272 pixels)
  • PC Interfaces: USB 2.0 (High Speed)
  • Data Storage: 8 GB Internal Flash Memory, 1 SDHC card slot
Click the button below to download the product datasheet.
Datasheet

PDF (1 MB)

Applications

Monitoring battery cell voltages and thermal profiles during charging cycles with isolated protection up to 110V peak.
Real-time logging of 4-20mA process signals (via shunt resistors) and voltage outputs from PLC systems.
Long-term climate monitoring in greenhouses or hydroponic facilities using the B-530 sensor and wireless data backup.
Multi-point temperature mapping and energy consumption analysis for commercial air handling and heating systems.
Thermal stability testing for cold storage and stability chambers requiring high-accuracy thermocouple inputs.
High-speed 10ms sampling of transient voltage events and performance testing of consumer electronics.

Frequently Asked Questions

â–¶ Q: Why can't I select the 10 ms sampling speed when using all 10 channels?
A: The GL260’s internal processing bandwidth dictates a strict relationship between sampling intervals and active channel counts. High-speed scanning restricts channel usage: a 10 ms interval limits you to 1 active channel, 20 ms allows up to 2 channels, and 50 ms allows up to 5 channels. To log data across all 10 channels simultaneously, you must set the sampling interval to 100 ms or slower.
â–¶ Q: Can the GL260 measure humidity directly out of the box?
A: No. While the GL260 has internal scaling software to calculate and display relative humidity percentages, it lacks a built-in humidity sensor. To capture humidity data, you must purchase the optional Graphtec B-530 humidity sensor, which connects directly to the analogue input terminal and is powered by the logger's 5 V output line.
â–¶ Q: What is the maximum voltage I can safely apply to a GL260 input channel?
A: The GL260 features input ranges up to 100 V, but its maximum safe input voltage between positive and negative terminals is 60 Vp-p on ranges above 5 V. Furthermore, the maximum withstand voltage between any input channel and the chassis ground is 350 Vp-p for 1 minute. Exceeding these limits risks destroying the logger’s solid-state isolation relays.
â–¶ Q: How long can the GL260 run continuously on its internal battery pack?
A: Using a single optional B-569 rechargeable battery pack, the GL260 will operate continuously for approximately 5 hours under standard operating conditions (assuming a 1-second sampling interval with the LCD screen saver active). The battery charges completely in roughly 4 hours when the unit is turned off and connected to AC power via the supplied adapter.
â–¶ Q: Can I save data directly to a computer in real-time instead of using the internal flash memory?
A: Yes. By connecting the GL260 to a PC via the built-in USB 2.0 port, you can use the bundled APS (APS Logger) software to stream, view, and record data directly to your computer's hard drive in real time. Alternatively, if you install the optional B-568 Wireless LAN unit, you can stream data wirelessly over a local network via FTP or log it directly into Graphtec’s cloud architecture.
GL260

GL260

GL260 Compact Standalone Midi Data Logger with 4.3 Inch Colour Display with 10 Analog Measurement Channels. Full Scale Measurement Range: 20mV to 100V and 8GB Internal Memory. Separate port for USB Flash Drive Support, 16-bit Resolution, Isolated Inputs. Includes Software and Cables. Dual SD Memory Ports. Wireless option allows connection to GL100-WL units, G-Remote Service, web server access, FTP backup and NTP clock synchronisation. New Features include Alarm History, Enhance Channel to Channel Calculations and Memory Loop Function.

£1,299.00
Add to Basket More Info
B-573

B-573

B-573 Battery pack for the GL Series data loggers. 7.2V 2,875mAh Li-Ion battery pack. A single unit is suitable for powering the GL260 and GL860 Data Logger. Two packs can be fitted into the GL860's.

£238.00
Add to Basket More Info
B-568

B-568

Wireless LAN Adapter for GL260 & 860 Series Data Loggers. The B-568 WLAN option enables wireless communication with various devices. The adapter allows the Data Logger GL260 or GL860 to be used as an access point for the GL100-WL to use. If the GL260 or GL860 configured as station, PC and mobile devices can communicate directly via wireless to the data logger. The adapter uses a 2.4GHz band IEEE802.11 b/g/n.

£195.00
Add to Basket More Info
B-530

B-530

B-530 Humidity Sensor. Range 0 - 100% RH, output 0 to 1vDC. Suitable for GL Series data loggers. Dimensions 14 mm diameter x 80mm with 3m cable and separate power socket.

£535.00
Add to Basket More Info

CONTACT US

8:30am to 5pm Monday to Thursday
8:30am to 3pm on Friday.

A real person will answer the phone and deal with your enquiry.
You can also click the button below and fill in our online enquiry form.

Technical Sales

We are here to help

Need help with your products or have a question for us on our custom systems? Use the form below to send us a message and our experts will be in touch to help.

Call us on +44 (0)1382 443000