HOBO MX2308 Temp/RH/PAR Data Logger
Overview
Whether you’re growing plants in a commercial greenhouse, managing indoor vertical farms, fine-tuning conditions in hydroponic systems, or conducting agricultural or ecological research, the MX2308 gives you the data you need to optimize conditions for growth, health, and productivity.
Built for simplicity and flexibility, this all-in-one logger integrates with the LI-COR® 190R PAR sensor, the industry standard for light measurement that’s trusted by researchers worldwide for its precision in measuring photosynthetically active radiation (PAR). This versatile logger is designed to operate reliably across diverse environments, from high-tech vertical farming racks to outdoor experimental plots to support informed decisions around lighting, ventilation, and irrigation without the complexity or high costs of traditional monitoring systems:
Examples of Monitoring Applications for the MX2308 Temp/RH/PAR Logger
- Growers, Farmers & Producers:Helps optimize growing conditions, improve yield consistency, and reduce disease risk for commercial greenhouse and indoor farming operators and hydroponic/aquaponic growers by monitoring where it matters most.em 1 text.
- Researchers & Educators:Wireless setup and data retrieval enable flexible deployment across experimental sites, with data quality ideal for agricultural researchers, plant scientists, and university programs without the budgetary or logistical barriers typical of research-grade systems.
- Ag Tech & Innovation Teams:Ease of deployment and integration-ready data formats make an ideal sensor platform for prototyping or scaled trials needed for companies innovating in lighting optimization and climate control solutions.
Setup and data retrieval are seamlessly simple—no cables or additional download devices needed using the free HOBOconnect app on your phone or tablet. Effortlessly configure the logger and download data via Bluetooth (up to a 100 ft range), which allows you to deploy in and download data from hard-to-reach spots.
Expand your remote monitoring by adding an MX Data Plan, which allows you to upload data to LI-COR Cloud remote software for further analysis, sharing, and more.
HOBO MX2308 Temp/RH/PAR Data Logger
Features
Wireless Bluetooth Data Offload
Fast, easy logger setup and download via phone or tablet (up to ~100 ft range)
High-Accuracy PAR Measurements
Integrated LI-COR PAR sensor delivers research-grade light intensity readings for both sunlight and indoor grow light conditions
Integrated Temp & RH Monitoring
Logged temperature and humidity alongside PAR enables calculation of VPD for a complete view of greenhouse climate conditions
Rugged, Weatherproof Design
Durable IP67/NEMA 6 housing stands up to humid, wet, and dusty environments found in greenhouses, growth chambers, or outdoor field site
Long Battery Life & Memory
User-replaceable battery lasts up to ~2+ years and ample data storage supports extended deployments
Alarms and Alerts
See out-of-range conditions with logger’s LED readout, and configure threshold alerts using HOBOconnect for proactive monitoring
Easy Deployment
Users can deploy the logger in minutes, configure logging intervals via the HOBOconnect app, and wirelessly retrieve data (without a laptop) in the field!
HOBO MX2308 Temp/RH/PAR Data Logger
Specifications
Logger
Temperature
-40 to 70 °C (-40 to 158 °F); Accuracy ±0.2 °C (typical) within 0 to 70 °C; Resolution 0.04 °C
Relative Humidity
Range 0–100% RH; Accuracy ±2.5% (typical) from 10% to 90% RH; Resolution 0.01% RH
PAR (Light Intensity)
Range 0 to 3,000 μmol/m²/s (full sunlight)
Accuracy ±5% typical (LI-190R factory calibration)
Spectral range 400–700 nm (PAR waveband)
Calculated Metrics
Vapor Pressure Deficit (VPD) in kPa, and Daily Light Integral (DLI) in mol/m²/day (computed from logged data)
Logging Interval
User-selectable from 1 second up to 18 hours
Memory Capacity
~35,000 sets of measurements
Wireless Range
Up to 30.5 m (100 feet) line-of-sight via BLE
Enclosure Rating
IP67 (NEMA 6)
Battery
2/3 AA 3.6 Volt Lithium; User-replaceable
Operating Environment
-40 to 70 °C, 0–100% RH
PAR Data Logger
