Large Display Stopwatch/Timer ventilation and ducting 1801 inserts have 18 single

1801 inserts have 18 single extra deep cells that can be separated

Multi-level lockable access menu and lockable set point to prevent accidental changes

the PPFD sensor will AUTOMATICALLY increase or decrease the output level of your supplemental lighting systems to continuously maintain the exact lighting level (in PPFD) that the user selects

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Steel Wire Brush

Large Display Stopwatch/Timer ventilation and ducting 1801 inserts have 18 singleLarge LCD for good visibility. Rugged ABS plastic case. Built in stand. Counts to 24 hours in 1 100th second resolution for the first 30 minutes. Split interval, clock, and calendar functions. Comes with a leatherette case and a "AA" battery. N. I. S. T. traceable Certification Report available. Dimensions: 3" x 2" x " Weight: 2. 6 oz *Certification Option N. I. S. T. traceable Certificate of Calibration is available at an additional cost (select