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You can buy directly from apogee for $575. It comes with the 620 and the handheld meter. https://www.apogeeinstruments.com/mq-620-340-1040-nm-extended-range-pfd-meter/ Otherwise the 620 by itself is $415 https://www.apogeeinstruments.com/sq-620-340-1040-nm-extended-range-pfd-sensor/

The USB SQ-626 version has been released for $465. https://www.apogeeinstruments.com/sq-626-340-1040-nm-usb-output-extended-range-pfd-sensor/