HOBO MX 2502 Underwater PAR Data Logger
The HOBO MX2502 Bluetooth Underwater PAR Logger delivers research-grade light measurement in a compact, rugged, waterproof housing rated for fresh and saltwater use. Featuring the industry-standard LI-COR LI-192 quantum sensor, it provides high-accuracy PAR data with built-in averaging, plus integrated temperature, tilt, and water-detect sensors for quality control. Dual air and water calibration factors ensure reliable multiparameter performance. Configure and offload data wirelessly via the free HOBOconnect app—no cables or laptops required. Easily mounts to third-party wipers and deployment frames. Optional LI-COR Cloud integration and recalibration services support long-term ecosystem research, restoration, and aquaculture site assessment.
Brand: HOBO
MPN: MX2502
UPC:
UNSPSC: 41111900
Weight:
Sensors –
Photosynthetically Active Radiation (PAR):
Range, 0-3000 µmol/m²/s (full sunlight); Accuracy, ±5% typical (LI-192 factory calibration)
Wavelengths: 400-700 nm with close-to-ideal PAR response
Cosine Correction: Optimized for both underwater and atmospheric use
Temperature: Range, -4°F to 122 °F (-20 to 50 °C) non-freezing water: Accuracy, ±0.2 °C; Resolution, 0.1 °C
Tilt Angle: Range, 0 to 180° from vertical; Accuracy, ±5°; Resolution, 1°
Logger –
Logging Interval: User-selectable from 1 second up to 18 hours
Memory Capacity: 195,000 sets of measurements
Wireless Range: Up to 30.5 m (100 feet) line-of-sight via Bluetooth Low Energy for wireless data download
Enclosure Rating: IP68 up to 30m
Battery: factory-replaceable battery with 6-year life at nominal logging interval with Bluetooth off
Operating Environment: -20 to 50C; fresh or saltwater; cannot be frozen in ice
Dimensions: 7.190˝L x 1.695˝Dia.
Weight: 0.604 lb.
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