Temp/RH/PAR Data Logger

High-precision monitoring of PAR, temperature, and humidity with effortless Bluetooth data offload, ideal for monitoring environmental conditions - from agricultural operations to academic research.

• Wireless Bluetooth data offload: Fast, easy logger setup and download via phone or tablet (up to ~100' range)

• High-accuracy PAR measurement: Integrated LI-COR PAR sensor delivers research-grade light intensity readings for both sunlight and indoor grow light conditions
• Integrated temp and 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 sites
• Long battery life and memory: User-replaceable battery last 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!

Rugged and Bluetooth-enabled, the Temp/RH/PAR data logger delivers research-grade monitoring of key growing conditions - photosynthetically active radiation (PAR), temperature and relative humidity - all in a single device. 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 Temp/RH/PAR data logger 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 Temp/RH/PAR Logger:

Growers, Farmers and 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.

Researchers and 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 and 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 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.

Operating range: -40 to +65 °C (-40 to +149 °F)
Temperature drift: <0.01 °C (0.018 °F) per year
Relativity Humidity (RH) sensor drift: <1% per year typical
Photosynthetically Active Radiation (PAR) offset: +/-1 μmo

Ordering information: Accessories sold separately: Solar radiation shield;
mounting bracket for solar radiation shield; mounting and leveling fixture for sensor; replacement battery; contact sales representative for more information. The FREE HOBOconnect app, and a compatible mobile device or Windows computer are required.

Delivery information: Includes Temp/RH/PAR, screws, and cable ties.