HOBO USB Micro Station Data Logger

Data Loggers

HOBO USB Micro Station Data Logger

  • Vendor:Onset

Availability: Available Item
Qty Price
Buy 1 $393.00 ea
Buy 10 $373.35 ea


Rugged and compact, the redesigned HOBO USB Micro Station is a weatherproof data logger for multi-channel monitoring of microclimates. This battery-powered station accepts up to five plug-and-play Smart Sensors and has a hinged door to make sensor installation simple and quick. The Micro Station is equipped with a built-in USB port for fast, efficient data readout to a computer, and an integrated mounting tabs for easy installation.


Highlighted Features

  • Compact size for easy deployment
  • Weatherproof IP66 enclosure for harsh environments
  • Direct USB offload--no need for an adapter cable
  • Includes five smart sensor inputs
  • Hinged door and integrated mounting tabs
  • Runs for up to a year on four standard AA batteries
  • Compatible with HOBOware and HOBOware Pro software for logger setup, graphing and analysis

In what environment does this data logger operate?

This data logger operates in indoor and outdoor environments.

What measurements does this data logger support?

The H21-USB data logger supports the following measurements: 4-20mA, Amp Hour (Ah), Barometric Pressure, DC Voltage, Kilowatt Hours (kWh), Leaf Wetness, Light Intensity, Power Factor (PF), Pulse Input, Rainfall, Relative Humidity, Soil Moisture, Temperature, Volt-Amp Reactive, Volt-Amp Reactive hour, Volt-Amps (VA), Water Flow, Watt Hours (Wh), Watts (W) and Wind

The country of origin for this product is the United States. To see the full specifications for this product, please see our product manual found under the documentation tab if available.
Operating Range: -20° to 50°C (-4° to 122°F) with alkaline batteries
-40 to 70°C (-40 to 158°F) with lithium batteries
Smart Sensor Connectors: 5
Smart Sensor Network Cable Length: 100 m (328 ft) maximum
Logging Interval: 1 second to 18 hours
Start Modes: Immediate, at interval, push button, or delayed start
Memory Modes: Stop when full or wrap when full
Memory : 512 KB nonvolatile flash data storage
Time Accuracy: 0 to 2 seconds for the first data point and ±5 seconds per week at 25°C (77°F)
Battery Type: Four AA 1.5 V alkaline batteries for operating conditions of -20° to 50°C (-4° to 122°F);
four AA 1.5 V lithium batteries for operating conditions of -40 to 70°C (-40 to 158°F)
Battery Life: 1 year, typical use (up to five sensors with 1 minute or greater logging interval)
Communication Type: USB 2.0 interface
Full Memory Download Time: 4 minutes
Enclosure Access: Hinged door secured by one latch with eyelet for use with user-supplied padlock
Materials: Outer enclosure: Polycarbonate/PBT blend with stainless steel hinge pins; Gaskets: Silicone rubber; Cable channel: EPDM rubber
Dimensions: 17.04 x 11.94 x 4.47 cm (6.71 x 4.70 x 1.76 in.) see diagrams in manual Padlock hole diameter: 0.58 cm (0.23 in.)
Weight: 414g (14.6 oz.)
Environmental Rating: Weatherproof enclosure, NEMA 4X and IP66
-The CE Marking identifies this product as complying with all relevant directives in the European Union (EU)

Graphing & Analysis

  • BHW-PRO HOBOware Pro CD or USB Drive (USB Cable Included) Software 
  • BHW-PRO-DLD HOBOware Pro - Mac/Win (Download Only) Software 

Barometric Pressure

Leaf Wetness

Light Intensity

  • S-LIA-M003 Photosynthetic Light (PAR) Smart Sensor 
  • S-LIB-M003 Solar Radiation (Silicon Pyranometer) Smart Sensor

Soil Moisture

Relative Humidity

  • S-THB-M002 12-bit Temperature/Relative Humidity (2m cable) Smart Sensor 
  • S-THB-M008 12-bit Temperature/Relative Humidity (8m cable) Smart Sensor

Water Flow


  • S-TMB-M002 12-Bit Temperature (2m cable) Smart Sensor 
  • S-TMB-M006 12-Bit Temperature (6m cable) Smart Sensor 
  • S-TMB-M017 12-Bit Temperature (17 m cable) Smart Sensor


  • S-RGF-M002 Davis® 0.2 mm Rain Gauge Smart Sensor 
  • S-RGA-M002 0.01" Rain Gauge (2m cable) Smart Sensor 
  • S-RGB-M002 0.2 mm Rainfall (2m cable) Smart Sensor

Kilowatt Hours

  • T-VER-8051-300 Veris Kilowatt Hour Transducer 1-Phase, 300 Amp Sensor 
  • T-VER-8053-800 Veris Kilowatt Hour Transducer 3-Phase, 800 Amp Sensor
  • T-VER-E50B2 E50B2 Power & Energy Meter Sensor 
  • T-WNB-3D-240 WattNode 208/240 VAC 3-phase Delta/Wye kWh Transducer Sensor 
  • T-WNB-3D-480 WattNode 480 VAC 3-phase Delta/Wye kWh Transducer Sensor 
  • T-WNB-3Y-208 WattNode 208/240 VAC 1,2, or 3 Phase Wye kWh Transducer Sensor 
  • T-WNB-3Y-208-P WattNode 208-240VAC 2 or 3 Branch Circuit kWh Transducer Sensor


AC Current, AC Voltage, Amp Hour, Kilowatts, Power Factor, Reactive Power, Volt-Amp Reactive Hour, Volt-Amps, Watt Hours, Watts



  • DESICCANT2 Large Desiccant Pack (25-count) Replacement


Cable Adapters - Splitters

  • S-ADAPT-6 Smart Sensor Consolidator Box Adapter 

Cable Management

Carrying Case

Communication Cables

Compliance Certificates

  • COMPLIANCE CERT Compliance Certification 

Grounding Wires

Tripod Parts, Kits and Masts

  • M-MPA 3m mast 
  • M-MPB 1.5 meter mast 
  • M-TPAHWS 3m Tripod Tower with mast 
  • M-TPA-KIT HOBO Weather Station 3-Meter Tripod Kit Kit 
  • M-TPB HWS 2m Tripod Tower with mast