HOBO MX2502 Underwater PAR Data Logger

Introducing the Next Generation of Underwater PAR Monitoring

The new HOBO MX2502 provides high-accuracy underwater PAR measurements in a compact, rugged logger designed for real-world deployments. Featuring the trusted LI-COR LI-192 sensor, Bluetooth wireless offload, and an integrated tilt sensor, the MX2502 makes collecting reliable light data easier than ever — whether you’re studying seagrass, tracking habitat health, or monitoring aquaculture environments.

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Research-Grade PAR Accuracy

Using the integrated LI-COR LI-192 Quantum Sensor, the MX2502 delivers industry-leading PAR measurement accuracy across 400–700 nm for precise underwater light profiling.

Bluetooth Configuration & Offload

Quickly configure the logger and offload data wirelessly in the field using the free HOBOconnect app — no cables, adaptors, or laptop required.

Integrated Tilt Sensor

Built-in tilt measurement ensures correct sensor orientation and supports post-deployment data correction when conditions shift.

Built for Long-Term Aquatic Deployments

Rated for both freshwater and saltwater use, with optional wiper accessory to keep the optical window clear. Up to 5-year factory-replaceable battery supports long deployments with confidence.

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About the HOBO MX2502

The HOBO MX2502 Underwater PAR Logger is designed for researchers who need accurate underwater light data without complicated workflows. Built on the proven HOBO MX platform, it features Bluetooth wireless offload, integrated tilt sensing, and compatibility with optional wiper and cloud-based data storage — making it suitable for both short-term studies and long-term monitoring.

Applications:

Marine ecology
Seagrass and kelp monitoring
Aquaculture environments
Coastal water quality studies
Habitat health assessments
Photosynthetic/light limitation studies
Baseline ecological surveys

Specs at a Glance

Parameters: PAR, temperature, tilt	PAR Range: 0–3000 μmol/m²/s	Wavelength Range: 400–700 nm	Dimensions: 1.7” diameter × 7.25”
Accuracy: ±5%	Environment: Freshwater & saltwater	Battery Life: Up to 5 years (factory replaceable)	Connectivity: Bluetooth (HOBOconnect app)
Accessory Compatibility: Sensor wiper	Cloud Integration:LI-COR Cloud

Already Using HOBO MX Loggers?

The MX2502 builds on the proven HOBO MX platform, adding wireless convenience, integrated tilt sensing, and optional cloud connectivity to deliver accurate underwater PAR measurements.

Explore other HOBO MX water loggers:

→ HOBO MX800 Series – Interchangeable sensors for comprehensive water quality monitoring

→ HOBO MX20L – Wireless water level logging with Bluetooth data offload

→ HOBO MX2501 – Rugged, research-grade pH monitoring for aquatic environments

HOBO MX2502 Underwater PAR Logger