Ocean Optics (Dunedin. FL) introduces the Jaz modular optical sensing instruments easily adaptable for the field, lab, or process environments. The stackable, modular, and autonomous components share common electronics and communications, and are able to operate together or separately. By incorporating a microprocessor and onboard display, the need for a PC is eliminated. Ethernet connectivity for Internet-addressable sensing, SD card for data storage, and battery module enable untethered measurements and data collection.