The HOBO U30 Remote Montoring System is a remote data logging and monitoring device with built-in Ethernet communications that can be easily reconfigured and adapted to a wide variety of applications. Up to 15 channels of data can be recorded and monitored remotely via HOBOlink™. Or, use HOBOware® Pro software to set up analog data channels, communicate with the logger locally, and further plot and export data files downloaded from HOBOlink for analysis.
Note: The HOBO U30 requires high-speed internet access and a data plan with HOBOlink.com, an Onset-hosted and managed web server.
In addition, you can set alarms to trip for specific sensor readings that you select or for overall system conditions, such as when the memory or battery is running low. See the HOBOlink Demo
Internet access to real-time data
All electronics are housed within a rugged double-weatherproof, tamper proof enclosure
Fully-integrated expandable communications
Set up is quick and easy with plug-and-play sensors
Fast data offload via USB
Optional analog inputs with sensor excitation
Includes relay that can be activated on user-defined alarm conditions
Wind Speed & Direction
Compressed Air Flow
Volatile Organic Compound (VOC)
Normal operating range: -20°C to 40°C (-4°F to 104°F)
Extended operating range: -40 to 60°C (-40 to 140°F) - see "Rechargeable Battery service Life" for impact of operations in Extended Operating Range.
Sensor Inputs: 5 standard; option to expand to 10
Smart Sensor Compatibility: Compatible with most Onset smart sensors
Data Channels: Maximum of 15 (some sensors use more than one data channel)
Alarm Output Relay: Can be configured to be activated, deactivated or pulsed on user-defined sensor alarms. The relay can be configured as normally open or normally closed, and is rated for 30 V and 1 amp max.
Expansion Slot: One expansion slot is available for factory-installed expansion port.
Local Communication: Full Speed USB via USB mini-B connector
Size: 17.8 H x 11.7 D x 19.3 W cm (7.0 H x 4 .6 D x 7.6 W inches)
Weight: 2 kg (4 lbs 10 oz)
Materials: Outer Enclosure: Polycarbonate/PBT blend with stainless steel hinge pins and brass inserts
Inner Enclosure: Polycarbonate with brass inserts
U-Bolts: Steel with zinc dichromate finish
Gaskets: Silicone rubber
Cable entry channel: EPDM rubber
Cable entry bars: Aluminum with ABS plastic thumb screws
Data Storage Memory: Nonvolatile flash data storage, 512K bytes local storage
Memory Modes: Stop when full, wrap around when full
Operational Indicators: Up to seven (depending upon options) status lights provide basic diagnostics
Logging Interval: 1 second to 18 hours, user-specified interval
Battery Type: 4 Volt, 10 AHr Rechargeable sealed lead-acid
Rechargeable Battery Service Life: Typical 3–5 years depending upon conditions of use. Operation within the extended operating range (but outside the normal range) will reduce battery service life.
Time Accuracy: 0 to 2 seconds for the first data point and ±5 seconds per week at 25°C (77°F)
Environmental Rating: Weatherproof enclosure, tested to NEMA 6. (Requires proper installation of cable channel system)
Mounting: 3.8 cm (1.5 inch) mast or wall mount
Enclosure Access: Hinged door secured by two latches with eyelets for securing with user-supplied padlocks
Alarm Notification Latency: Logging interval plus 2–4 minutes (typical). Onset is not responsible for failed connections or undelivered mail/text messages.
Alarm Output Relay: One relay contact closure can be configured as normally open, normally closed, or pulsed.
Voltage: t30 V Current: 1 amp max.
Sensor Network Cable Length: 100 m (328 ft) maximum
External Power: External power is required. The system optionally accepts the following Onset solar panels:
Alternatively it accepts an AC power adapter:
Interface: Ethernet 10Base-T or 100Base-TX (Using external RJ45 Jack)
Encryption: 256-bit AES Rijndael encryption
RJ 45 Jacks: 1