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Onset HOBO H21-USB Micro Weather Station and Data Logger

  • Onset HOBO H21-USB Micro Weather Station and Data Logger
  • Onset HOBO H21-USB Micro Weather Station and Data Logger
  • Onset HOBO H21-USB Micro Weather Station and Data Logger
  • Onset HOBO H21-USB Micro Weather Station and Data Logger
  • Onset HOBO H21-USB Micro Weather Station and Data Logger
  • Onset HOBO H21-USB Micro Weather Station and Data Logger


HOBO USB Micro Weather Station and Data Logger

Part Number: H21-USB

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  • Accepts up to (5) Plug-and-Play Smart Sensors for Accurate Outdoor Monitoring

  • Weatherproof Enclosure to Handle Harsh Environments

  • Powered By (4) AA Alkaline Batteries with 1 Year Typical Life

  • Supports Measurement Averaging Based on Availability of Supporting Data from Sensor

  • Measure Your Choice of Temperature, Humidity, Leaf Wetness, Rainfall, Barometric Pressure, Soil Moisture, Wind Speed & Direction, Solar Radiation, Photosynthetic Light, 0-5 Volts DC or 4-20 mA, Water Flow using Onset Smart Sensors (Sold Separately)

  • Includes (4) AA Alkaline Batteries, Screws and Zip Ties for Mounting

Availability: In stock

$220.00

Onset HOBO® H21-USB USB Micro Weather Station Specifications

Sensor Inputs 5
Sampling Rate 1 Second to 18 Hours (User Selectable)
Operating Range Alkaline Batteries: -20°C to 50°C (4°F to 122°F)
Lithium Batteries: -40°C to 70°C (-40°F to 158°F)
Memory 512K Nonvolatile Flash Data Storage
Data Storage Capacity 51,000 Recorded Readings
Start Modes Immediate, At Interval, Push Button Start or Delayed Start
Memory Modes Stop When Full or Wrap When Full
Time Accuracy 0 to 2 Seconds for First Data Point
±5 Seconds per Week at 25°C (77°F)
Materials Outer Enclosure: Polycarbonate/PBT Blend with Stainless Steel Hinge Pins
Gaskets: Silicon Rubber
Cable Channel: EPDN Rubber
Power Source (4) Standard AA Alkaline Batteries (Included)
Battery Life Typically 1 Year
(Up to 5 Sensors, 1 Minutes Sample Rate)
Communications USB 2.0 Interface
Enclosure Access Hinged Door Secured by 1 Latch with Eyelet for Use with User-Supplied Padlock
Sensor Network Cable Length: 100 meters (328 ft) Maximum
Software Compatibility HOBOware and HOBOware PRO Version 3.7.10+
OS Compatibility Windows: Windows 10, 8.1, 8 and 7
Mac: OS X 10.9.x, 10.10.x and 10.11.x
Standards Compliance CE, IP66, NEMA 4
Environmental Rating Weatherproof with Gore Vent for Deployment in Harsh Weather Conditions
Weight 414 g (14.6 oz.)
Dimensions 17.04 cm x 11.94 cm x 4.47cm (6.71" x 4.70" x 1.76")
Padlock Hole Diameter: 0.58 cm (0.23")

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Voltage Input Lead Set and Cables

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  • 25°C to 85°C Temperature Rating
  • Electrical Rating: IEC 60101-031 @ 1000 Volts CAT II, 600 Volts CAT III P2
  • Indulsted Nickel Plated Brass, Sheathed Banana Plug Receptable
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Onset NDVI Light Sensor Bracket

Onset NDVI Light Sensor Bracket

  • Used to Mount 2 PAR Sensors and 2 Solar Radiation Sensors on the Light Sensor Bracket for Making the Measurements Needed to Calculate the Normalized Difference Vegetation Index (NDVI)
  • Dimensions: 72mm x 114mm (3.0" x 4.5")
  • Weight: 62 grams (2.2 oz)
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Onset Light Sensor Bracket

Onset Light Sensor Bracket

  • Designed for Use With Tripods, Masts or Flat Surfaces
  • Used to avoid Obstructions and Shadows Affecting Measurements
  • Positions PAR Sensor for Optimal Measurement Accuracy
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Includes Leveling Screws

Learn More
$32.00
Onset Light Sensor Level

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  • Tolerance or Sensitivity: ±10 Minutes
  • Weight: 10 grams (0.3 oz)
  • Dimensions: 3.8 cm x 3.2 cm (1.5" x 1.25")
  • Constructed of PVC with Chrome-Plated Brass and Glass Level
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Onset Pre-Assembled Solar Radiation Shield

Onset Pre-Assembled Solar Radiation Shield

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  • Pre-Assembled for Easy Deployment
  • Multi-plate Construction for Maximum Airflow
  • Enclosure Can Be Easily Opened for Offloading Data

Includes Mounting Bracket, Cable Ties, Knurled Nuts, Screws and Hose Clamp

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Onset Replaceable RH Caps with membrane and tape

Onset Replaceable RH Caps with membrane and tape

  • (5) Replacement Humidity Caps
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Includes Membrane and (5) Pieces of White Tape

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$48.00
Onset Replaceable Humidity Sensor

Onset Replaceable Humidity Sensor

  • Replacement Relative Humidity (RH) Sensor
  • Compatible with the Onset HOBO UX00-023, U23-001, ZW-005, ZW-007 Data Loggers
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$65.00
HOBOware Pro Software and USB Cable Kit

HOBOware Pro Software and USB Cable Kit

  • Advanced Software for Management of Onset Data Loggers
  • Supports Data Shuttle, Data Assistants and Plug-ins
  • Additional Time-Saving Tools for Fast Setup and Data Readout
  • Advanced Plotting Tools for More Precise Data Analysis
  • Compatible with Windows and Mac Operating Systems

Kit Includes HOBOware Pro Software and Standard Type A to Mini B USB Cable (#CABLE-USBMB-HS)

Compare HOBOware (Free Download) to HOBOware Pro Software

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$99.00
Onset 1 to 6 Adapter for Smart Sensors

Onset 1 to 6 Adapter for Smart Sensors

  • Connect up to 6 Smart Sensors in a Water-Resistant Enclosure to 1 Sensor Extension
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$105.00
Onset Full Cross Arm

Onset Full Cross Arm

  • Provides Mounting for Wind Speed and Wind Direction Sensors
  • Unobstructed Wind Measurement
  • Dimensions: 91.5 cm x 3.2 cm x 3.2 cm (36" x 1.25" x 1.25")

Includes Mast Mounting Hardware

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$72.00
Onset Half Cross Arm

Onset Half Cross Arm

  • Provides Mounting for (1) Wind Speed or (1) Wind Direction Sensor
  • Unobstructed Wind Measurement
  • Dimensions: 91.5 cm x 3.2 cm x 3.2 cm (36" x 1.25" x 1.25")

Includes Mast Mounting Hardware

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$50.00

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