4-20mA Data Loggers & Sensors




HOBO Micro Station Data Logger - H21-002
4-external channels

part # H21-002 (View Specs)
  • Supported Measurements (sensors sold separately):
    Weather: Barometric Pressure, Leaf Wetness, Light Intensity, PAR, Pulse Input, Rainfall See more, Relative Humidity, Soil Moisture, Solar Radiation, Temperature, Wind Speed & Direction, 4-20mA, Voltage Input See less
    Energy: DC Voltage, kWh, Pulse Input, Relative Himidity, Temperature, Water Flow, 4-20mA
  • Improved weatherproof enclosure for harsh environments
  • Optional analog and pulse inputs for 3rd-party sensors
  • Battery-powered for up to a year - no solar panels required
Minimum System Requirements


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$220
1-4 5-24 25-49 50+
$220 $209 $198 $187



HOBO® Energy Logger - H22-001
multi-channel data logger

part # H22-001 (View Specs)
  • Supported Measurements (sensors sold separately):
    4-20mA, AC Current, AC Voltage, Air Velocity, Amp Hour (Ah), Carbon Dioxide See more, Compressed Air Flow, DC Current, DC Voltage, Differential Pressure, Gauge Pressure, Kilowatt Hours (kWh), Kilowatts (kW), Power Factor (PF), Pulse Input, Relative Humidity, Temperature, Volatile Organic Compound, Volt-Amp Reactive (VAR), Volt-Amp Reactive Hour (VARh), Volt-Amps (VA), Water Flow, Watt Hours (Wh), Watts (W), Wind See less
  • Records up to 15 channels
  • Provides 12v excitation for third-party sensors
  • Innovative, snap-in FlexSmart™ signal conditioning modules convert signals from nearly any type of sensor.
Minimum System Requirements


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$315
1-4 5-24 25-49 50+
$315 $299 $283 $268



HOBO U12 4-Channel External Data Logger - U12-006

part # U12-006 (View Specs)
  • Supported Measurements (some sensors sold separately):
    4-20mA, AC Current, AC Voltage, Air Velocity, Carbon Dioxide, Compressed Air Flow See more, DC Current, DC Voltage, Gauge Pressure, Kilowatts (kW), Temperature, Volatile Organic Compound See less
  • 12-bit resolution provides high accuracy
  • Stores 43,000 measurements
  • Programmable and push button start
  • Direct USB interface for fast data offload
  • Compatible with Onset’s HOBO U-Shuttle for convenient data transport
Minimum System Requirements


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$108
1-9 10-99 100+
$108 $100 $92



HOBO U12 4-Channel External Data Logger - U12-008

part # U12-008 (View Specs)
  • Supported Measurements (sensors sold separately):
    4-20mA, AC Current, AC Voltage, Air Velocity, Carbon Dioxide, Compressed Air Flow See more, DC Current, DC Voltage, Gauge Pressure, Kilowatts (kW), Temperature, Volatile Organic Compound See less
  • 12-bit resolution provides high accuracy
  • Stores 43,000 measurements
  • Programmable and push button start
  • Direct USB interface for fast data offload
  • Compatible with Onset’s HOBO U-Shuttle for convenient data transport
Minimum System Requirements


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$215
1-9 10-99 100+
$215 $199 $183



HOBO U12 Temperature/Relative Humidity/Light/External Data Logger - U12-012

part # U12-012 (View Specs)
  • Supported Measurements (some sensors sold separately):
    4-20mA, AC Current, AC Voltage, Air Velocity, Carbon Dioxide, Compressed Air Flow See more, DC Current, DC Voltage, Gauge Pressure, Kilowatts (kW), Light Intensity, Relative Humidity, Temperature, Volatile Organic Compound See less
  • 12-bit resolution provides high accuracy
  • Stores 43,000 measurements
  • Programmable and push button start
  • Direct USB interface for fast data offload
  • Compatible with Onset’s HOBO U-Shuttle for convenient data transport
  • Replacement for: H08-004-02, H08-006-04
Minimum System Requirements


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$133
1-9 10-99 100+
$133 $123 $113



HOBO U12 Temperature/Relative Humidity/2 External Channel Data Logger - U12-013

part # U12-013 (View Specs)
  • Supported Measurements (some sensors sold separately):
    4-20mA, AC Current, AC Voltage, Air Velocity, Carbon Dioxide, Compressed Air Flow See more, DC Current, DC Voltage, Gauge Pressure, Kilowatts (kW), Relative Humidity, Temperature, Volatile Organic Compound See less
  • 12-bit resolution provides high accuracy
  • Stores 43,000 measurements
  • Programmable and push button start
  • Direct USB interface for fast data offload
  • Compatible with Onset’s HOBO U-Shuttle for convenient data transport
Minimum System Requirements


View/Add Required Items
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$133
1-9 10-99 100+
$133 $123 $113



HOBO® U30 Ethernet Data Logger - U30-ETH
15 Channel Web-based Monitoring System

part # U30-ETH (View Specs)
  • Supported Measurements (sensors sold separately):
    Weather: Barometric Pressure, Leaf Wetness, Light Intensity, PAR, Pulse Input, Rainfall See more, Relative Humidity, Soil Moisture, Solar Radiation, Temperature, Wind Speed & Direction, 4-20mA, Voltage Input See less
    Energy: AC Current, AC Voltage, Air Velocity, Amp Hour (Ah), Carbon Dioxide, Compressed Air Flow See more, DC Current, DC Voltage, Differential Pressure, Gauge Pressure, kW, kWh, Power Factor (PF), Pulse Input, Relative Himidity, Temperature, Volatile Organic Compound (VOC), Volt-Amp Reactive (VAR), Volt-Amp Reactive Hour (VARh), Volt-Amps (VA), Volts (V), Water Flow, Watt Hours (Wh), Watts (W), 4-20mA, Amps (A) See less
  • Optional analog inputs with sensor excitation
  • Notifies you of alarm conditions via email or text messages
  • Includes relay that can be activated on user-defined alarm conditions
  • Up to 15 channels of data can be accessed remotely via Onset's web-enabled software platform, HOBOlink™.
Minimum System Requirements


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HOBO U30 Cellular Data Logger - U30-GSM
15 Channel Web-based Monitoring System

part # U30-GSM (View Specs)
  • Supported Measurements (sensors sold separately):
    Weather: Barometric Pressure, Leaf Wetness, Light Intensity, PAR, Pulse Input, Rainfall See more, Relative Humidity, Soil Moisture, Solar Radiation, Temperature, Wind Speed & Direction, 4-20mA, Voltage Input See less
    Energy: AC Current, AC Voltage, Air Velocity, Amp Hour (Ah), Carbon Dioxide, Compressed Air Flow See more, DC Current, DC Voltage, Differential Pressure, Gauge Pressure, kW, kWh, Power Factor (PF), Pulse Input, Relative Himidity, Temperature, Volatile Organic Compound (VOC), Volt-Amp Reactive (VAR), Volt-Amp Reactive Hour (VARh), Volt-Amps (VA), Volts (V), Water Flow, Watt Hours (Wh), Watts (W), 4-20mA, Amps (A) See less
  • Optional analog inputs with sensor excitation
  • Notifies you of alarm conditions via email or text messages
  • Includes relay that can be activated on user-defined alarm conditions
  • Can be used in over 30 countries
  • Up to 15 channels of data can be accessed remotely via Onset's web-enabled software platform, HOBOlink™.
Minimum System Requirements


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HOBO U30 USB Data Logger - U30-NRC
15 Channel Energy Monitoring and Weather Station

part # U30-NRC (View Specs)
  • Supported Measurements (sensors sold separately):
    Weather: Barometric Pressure, Leaf Wetness, Light Intensity, PAR, Pulse Input, Rainfall See more, Relative Humidity, Soil Moisture, Solar Radiation, Temperature, Wind Speed & Direction, 4-20mA, Voltage Input See less
    Energy: AC Current, AC Voltage, Air Velocity, Amp Hour (Ah), Carbon Dioxide, Compressed Air Flow See more, DC Current, DC Voltage, Differential Pressure, Gauge Pressure, kW, kWh, Power Factor (PF), Pulse Input, Relative Himidity, Temperature, Volatile Organic Compound (VOC), Volt-Amp Reactive (VAR), Volt-Amp Reactive Hour (VARh), Volt-Amps (VA), Volts (V), Water Flow, Watt Hours (Wh), Watts (W), 4-20mA, Amps (A) See less
  • Fast data offload via USB
  • Optional analog inputs with sensor excitation
  • Includes relay that can be activated on user-defined alarm conditions
  • Up to 15 channels of environmental data can be graphed and analyzed with HOBOware® Pro software.
Minimum System Requirements


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Call 1-800-564-4377 or
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HOBO U30 Wi-Fi Data Logger - U30-WIF
15 Channel Web-based Monitoring System

part # U30-WIF (View Specs)
  • Supported Measurements (sensors sold separately):
    Weather: Barometric Pressure, Leaf Wetness, Light Intensity, PAR, Pulse Input, Rainfall See more, Relative Humidity, Soil Moisture, Solar Radiation, Temperature, Wind Speed & Direction, 4-20mA, Voltage Input See less
    Energy: AC Current, AC Voltage, Air Velocity, Amp Hour (Ah), Carbon Dioxide, Compressed Air Flow See more, DC Current, DC Voltage, Differential Pressure, Gauge Pressure, kW, kWh, Power Factor (PF), Pulse Input, Relative Himidity, Temperature, Volatile Organic Compound (VOC), Volt-Amp Reactive (VAR), Volt-Amp Reactive Hour (VARh), Volt-Amps (VA), Volts (V), Water Flow, Watt Hours (Wh), Watts (W), 4-20mA, Amps (A) See less
  • Optional analog inputs with sensor excitation
  • Notifies you of alarm conditions via email or text messages
  • Includes relay that can be activated on user-defined alarm conditions
  • Up to 15 channels of data can be accessed remotely via Onset's web-enabled software platform, HOBOlink™.
Minimum System Requirements


See Compatible Sensors
See Parts & Accessories

Need Help?
Call 1-800-564-4377 or
Chat Live Now.