How to Choose a Multi-Channel Data Logger

A multi-channel data logger records signals — DC voltage, thermocouple and RTD temperature, humidity, logic and pulse — across many points at once, with isolation that keeps channels from interfering with each other. In the lab they validate and map ovens, freezers, sterilizers and incubators, and capture long unattended experiments. This guide compares Yamato's GL260 and GL860.

Step 1 — Count your channels (now and later)

Channel count is usually the deciding factor. The GL260 provides 10 isolated analog channels — enough for single-chamber mapping or a handful of process points. The GL860 starts at 20 channels and expands to a maximum of 200, for multi-point chamber mapping, large temperature surveys, or whole-system monitoring.

Step 2 — Compare the two models

Feature	GL260	GL860
Analog channels	10 (isolated)	20 standard, up to 200
Fastest sampling	10 ms	5 ms
Display	4.3″ color	7″ color LCD
Inputs	Voltage, thermocouple (K,J,E,T,R,S,B,N,C,W), humidity*	Voltage, thermocouple (K,J,E,T,R,S,B,N,C), RTD
Interfaces	USB 2.0, wireless LAN*	USB 2.0, Ethernet, Wi-Fi*
Storage	~8 GB internal + SD	8 GB internal + SDHC to 32 GB
Notable functions	Compact, battery-capable, portable	Memory-loop, channel-copy, alarm history, inter-channel math, Modbus
Size / weight	188 × 117 × 42 mm · ~500 g	Larger; terminal-dependent

*Optional accessory required. Both record to GBD or CSV, run from an AC adapter (100–240 V) and offer four alarm outputs.

Step 3 — Match inputs and connectivity

If you measure RTDs or need Ethernet/Modbus integration into a SCADA or building system, the GL860 is the fit. If you need humidity input or a small, battery-ready recorder you can carry between benches and field sites, the GL260 is ideal. Both accept the common thermocouple types used in thermal validation.

Which should you buy?

• Choose the GL260 for portable, up-to-10-channel logging — bench experiments, single-chamber mapping, field work.
• Choose the GL860 for high channel counts (up to 200), 5 ms sampling, RTDs, Ethernet/Modbus connectivity, and advanced recording functions.

Frequently asked questions

What does "isolated channels" mean and why does it matter?

Each input is electrically separated from the others, so a fault or common-mode voltage on one channel doesn't corrupt readings on the rest — essential for mixing thermocouples and higher-voltage signals on one instrument.

Can these loggers run unattended for long studies?

Yes. Both write to internal memory plus removable SD media in CSV or GBD format; the GL860 adds memory-loop recording for continuous capture, and the GL260 can run on an optional battery pack.

What can I expand the GL860 to?

From 20 channels standard up to a maximum of 200 channels using additional terminals/extension units — ideal for large chamber-mapping arrays.

See both models: Multi-Channel Data Loggers. In stock at LabSupplies.com — authorized Yamato Scientific dealer, ships from USA.