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The REED R7140 combination tachometer measures both RPM and surface speed (m/min or ft/min) using either its visible-light non-contact laser (5 to 99,..

The REED R7140-NIST is a dual-mode tachometer offering non-contact photo readings up to 99,999 RPM (using visible light, not laser, from up to 12 inch..

Purpose-built for measuring modern LED, incandescent, and colored (red/green/yellow/blue/white) light sources, this auto-ranging meter reads up to 199..

The SD-230-Kit2 bundles REED's SD-230 data-logging meter with a PE-11 pH electrode and an ORP-14 ORP electrode. It measures pH from 0.00-14.00 and ORP..