✅【IP68 Waterproof PAR Meter】DANOPLUS PAR Meter sensor features an IP68 waterproof rating, ensuring accurate measurement of photosynthetic active radiation (PAR) for corals even in underwater environments. ✅【37" Solid Telescopic Pole Included】This aquarium PAR meter comes equipped with a 37-inch sturdy telescopic pole and a 79-inch sensor cable, allowing for easy submersion and positioning in reef tanks. The secure mounting system ensures effortless operation and precise PAR readings. ✅【High Precision PPFD Measurement】The PPFD meter provides highly accurate readings from 0 to 4000 μmol/m²/s, with a spectral range of 400–700 nm (±10 nm), ensuring reliable PPFD data for optimal coral growth in reef tanks. ✅【Built-In Data Logger】The reef PAR meter features manual data logging with storage for up to 100 PPFD values, allowing you to track previous measurements and fine-tune grow light intensity for maximum efficiency. ✅【Complete PAR Meter Set】This aquarium par meter features Calibration, HOLD, and Data Logging functions. The set included: PAR meter main unit, IP68 waterproof par quantum sensor, 79" Cable, 37" solid telescopic pole and AAA batteries x 2pcs DANOPLUS par quantum sensor is designed with IP68 waterproof level