AVO All-in-One, Sensors-to-Cloud Cellular Gateway


Stevens Water


  • A complete monitoring station platform, cellular cloud gateway.
  • Allows Data acquisition, cloud-based data storage, viewing and analysis.
  • Makes any sensor data (sensor-agnostic - any brand) easily accessible and the station is remotely configurable.

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Number of Channels 10 channels (SDI-12)
ADC Bits 21 bit
With Display No
IP Classification IP66
Communications Cloud-based
Battery Life 10 Ah Li-ion
Memory Capacity unlimited in the cloud

Avo is a complete monitoring station platform. It includes all hardware, software and services needed for data acquisition, cloud-based data storage, viewing and analysis.
It makes any sensor data easily accessible and the station remotely configurable. Just add sensors.


  • Unified data interface experience: Sensor configuration, data storage, custom algebraic equations, custom data formats and forwarding, control, analysis, alarm notifications (email, SMS), reporting and actions all done with one simple cloud-based user interface.

  • Easy configuration: Configure with your smartphone, tablet or PC via the cloud-based Stevens-Connect. No custom programming or scripts required.

  • Automated updates: Updates to firmware and cloud-based application can be automaticly installed.

  • Security: Three user access levels for configuration, data management interface and visualization. Optional data encryption available.

  • Redundancy: All data is saved locally on an SD storage card, and once on the cloud is replicated on a redundant data server and backed up nightly.

  • Connection verification: Avo verifies connection with cell network and server connection before data is sent. If no connection is available or if data reception is not confirmed, data is saved and sent the next scheduled transmission.

  • Data format flexibility: Optionally forward data in various formats for third party software platforms, like Aquarius or WISKI, and in other formats such as binary, pseudo-binary, SHEF, and more.

  • Direct data access options: Third-party programs can access data using REST API or HTTP post.

Data storage
Removable 2 GB SD memory card (FAT 32)
Non-volatile memory: All setup parameters
Logging interval: 1 second to 24 hours (sensor dependent)
Reporting interval: 2 minutes to 24 hours
Cellular communications:

  • Dual band CDMA 800, 1900 MHz
  • Penta-Band HSPA+
  • GSM Quad band 850, 900, 1800, 1900 MHz
  • UMTS/HSPA Penta Band 850, 900, 1700, 1900, 2100 MHz
  • EGPRS/WCDMA/HSDPA/HSUPA protocol stack

Listen/trigger mode/idle: <2 mA
Data receive/store/prepare for Tx: 150 mA
Data Tx: 250 mA

Battery: 10 Ah Li-ion
TX output power: 24.3 dBm (270 mW)
Solar panel: 5W, 12V

Analog input
- 4 analog channels, single-ended
- Input type: 2 wire, 0-2.5 V or 4-20 mA current loop
- Sensor power: 24 VDC switched (under firmware control)
- Analog to digital (0-2.5 VDC): 21-bit resolution

Pulse input
- 2 pulse channels
- Continuity or TTL: 0 V to 2.2 V - 5 V
- Maximum rate: 10 pulses per second

SDI-12 input
- Number of sensors: up to 10 sensors
- Sensor power: 12 VDC switched or constant during measurement

Operating temperature:
-20°C to 75°C (-4°F to 167°F). Battery won’t charge below 0°C.
-40°C to 75°C (-40°F to 167°F) with extended temperature option

Storage temperature:
-40°C to 85°C

Lightning protection
AC transient voltage suppressor (TVS) on each sensor port input

Dimensions: 1.6” (4.1 cm) x 6.7” (17.0 cm) x 4.8” (12.2 cm)

Weight: 10.78 oz (305.6 g)

Whether you’re using Stevens sensors or sensors from another manufacturer, they’re fully compatible.
Field-installable connectors can be used for sensors on an existing station.

Up to 10 SDI-12, up to 4 analog (0-2.5 V or 4-20mA) or up to 2 pulse sensors can be connected.
The number of sensors that can be connected is limited only by the total power load.

Our cloud-based data hub is incredibly powerful and incredibly intuitive. It’s used to configureyour sensors’ logging and reporting settings.
It stores and analyzes your data, notifies your smartphone when conditions are met, allows you to visually create custom calculations and “virtual sensors”, and it can receive and/or forward data from/to 3rd-party systems.

Avo is perfect for:
• Temporary sensor deployments where simplicity and quick
assembly / disassembly are important.
• Linking existing sensors directly to the cloud.
• Any environmental
monitoring application where minimizing complexity and maximizing reliability is important.

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