Check the listing for details. PAR Meter Waterproof IP68 Quantum Sensor PPFD Meter Data Logger for Reef Tank. Condition: New. Listed at 155.99 USD. WATERPROOF PAR METER ✔ Accurate PPFD Measurement: DANOPLUS PAR meters measure the light that plants use for photosynthesis, providing essential data to optimize growing conditions and improve plant health and yields. ✔ Improved Crop Management: By understanding the light distribution in a growing area, users can make informed decisions about lighting adjustments, placement of plants, and other factors to ensure even light distribution. ✔ Energy Efficiency: Monitoring light levels can help adjust artificial lighting to avoid over or under-lighting, thus saving energy and reducing costs. ADVANTAGE OF WATERPROOF QUANTUM SENSOR (IP68) ✔ Durability and Versatility: An IP68 rating means the sensor is dust-tight and can withstand continuous immersion in water. This makes it ideal for use in a wide range of environments, including underwater applications in aquariums, hydroponic systems, and outdoor settings where it might be exposed to rain or splashes. ✔ Reliability: The waterproof design ensures consistent and accurate readings in the underwater and wet conditions, enhancing the reliability of the data collected over time. ADVANCED MODES SELECTIONS ✔ CALI : The Calibration function enables the user to adjust the ZERO measurement. Please note that the light sensor must be fully covered during calibration. ✔ LOG : This feature enables the user to access the historical data. The meter can record up to 100 groups of data. ✔ RCFS : The "Restore Factory Settings" feature enables the user to reset the device to its original factory configuration and delete all stored log data. PACKAGE CONTENTS: ✔ Par Meter Main Unit ✔ Par Meter Sensor ✔ 79'' Sensor Cable ✔ 37" Extension Rod with 1/4" Screw ✔ 2 x AAA batteries ✔ User Manual ✔ Packaging Box