Easy cloud connection, no data logger required.

Part # 800605

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    Power input

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    Cellular antenna

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    Test message button immediately starts data transmission so you operation can be verified while on site

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    Communication activity LED (slow blink when connected, fast blink when no connection)


Stevens' MEASUREMENTS TO MIND strategy maximizes reliability of your remote monitoring network and makes it simple to connect your station directly to the cloud.


eTracker embraces the future of true cloud-based remote data acquisition. eTracker is a simple, power-efficient station data acquisition platform with 2-way cellular (GSM/CDMA/HSPA) telemetry, which connects sensors directly to the cloud. All configurations, data logging and data processing is done on a cloud-based server, which creates more efficient centralized processing and control of remote data locations. This eliminates time and cost in programming and maintaining more expensive, complex, higher-power consuming data loggers and communication devices at each remote location. Using eTracker for all types of monitoring applications gives the power to access collected data anywhere, anytime.

  • Cellular-based telemetry and station controller.
  • Links sensors directly to the cloud, no need for a datalogger.
  • It’s like a virtual datalogger—all sensor data is forwarded to the cloud for processing, logging, retrieval and resulting action.
  • Integrated sensor interface with ports: 4 analog, 4 pulse, SDI-12 (up to 62 SDI-12 sensors).
  • Approximately 20X typical improvement in power consumption vs. typical cellular telemetry.
  • Intelligent data management, data buffering, and network verification to ensure successful transmission of critical data.
  • Can be used with your choice of cellular carriers (3G GSM or 3G CDMA).
  • Perfect for quick, easy, installations of small stations.

Unique Features

  • Link sensors to the cloud: Sensor data is forwarded directly to a server destination via the cellular network using HTTP and/or FTP protocols.
  • Back-up data storage: All transmitted data is also stored on removable data storage media (SD card) for protection against lost data.
  • Cloud-based data: All complex data operations, calculations, processing (if configured) and alarm notification setup is done in the cloud.
  • Integrated data management: Sensor configuration, data storage, calculations, control, analysis, alarm conditions, alarm notifications (email, SMS, voice), reporting and actions all done in the cloud.
  • Easy configuration: Configure via the web-based portal. No custom programming or scripts required.
  • Smart power management: eTracker features an ultra-low-power mode that consumes just 1.6mA at idle (that’s less than 1% of a typical cell modem).
  • Reliability: eTracker verifies connection with cell network and HTTP 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 flexibility: Forward your data to any destination to access with any software platform, like Aquarius or our own cloud-based Stevens-Connect.
  • On-site connection validation: The unique Test Mode sends an immediate data transmission from the site, allowing you to verify successful reception before you leave the site.

Connect sensors via cellular telemetry directly to the cloud.
No data logger required.

eTracker links your sensors directly to the cloud, eliminating the expense, complexity and additional battery drain of a data logger. It's like a "virtual data logger"—all data storage, sensor configuration, calculations, control, analysis, alarms and other processing of your data is performed in the cloud. Your data can be retrieved at any destination, via your own FTP site, your own website via HTTP, or via a complete data management system like Stevens Connect or Aquatic Informatics' Aquarius. This means you don't need to manage software licenses or maintain specific computers to access your data or reconfigure your remote system.

eTracker schematic


Just add a data logger or smart sensors and go. Configure the station and access insightful information—not just data—any time from any device via the cloud software.


Any sensors. Any type of system. Any application.


Smart data verification, redundancy and status reporting built in. Unheard-of power efficiencies and 2-way communication for inexpensive remote station access and control.

Dead simple setup and configuration.

Anytime, anywhere, any device.

All configuration and programming of the remote Cell-Net is done online via a web-based management portal. Setup in 3 steps:


Connect sensors


Connect to power source


Configure data handling (frequency, redundancy, destination) with a simple online GUI

Technical Specifications

Key features


16-bit dsPIC microprocessor, and 16-bit TI MSP430

Data Storage

Removable 2 GB SD memory card

Non-volatile memory

All setup parameters

Logging interval

1 second to 24 hours

Reporting interval

2 minutes to 24 hours

Sensor Input

Analog input

4 analog channels, single-ended
Input type: 2 wire, 0 –2.5 V or4 - 20 mA current loop (accessible DIP switch)
Sensor power

: 24 VDC switched (under firmware control)
Analog to digital (0-2.5 VDC): 21-bit resolution

Pulse input

4 pulse channels
Input type: Edge triggered
Maximum rate: 4 pulses per second

SDI12 Input

Number of sensors: up to 62 sensors
Sensor power: 12 VDC switched, during measurement

Current consumption

Listen/trigger mode/idle

1.6 mA

Data receive/store/prepare for transmission

150 mA

Data transmit

250 mA


Input voltage

10 to 18 VDC

TX output power

24.3 dBm (270 mW)



1 3/8” (3.5 cm) x 5 1/8” (13 cm) x 3 3/4” (9.7 cm)


10.78 oz (305.6 g)


Operating temperature

-30°C to 65°C (SIM Card selection may limit this range for GSM version)

Storage temperature

-40°C to 85°C (SIM Card selection may limit this range for GSM version)



Indicates power to the unit


Indicates if there is a connection to the tower


Cellular antenna


Sensor module interface

30-pin connector


Power cable with flying leads, dipole dual-band cellular 800/1900 MHz antenna.