True cloud-based sensor configuration, logging, reporting and data analysis all-in-one.

Part # 800605

  • More

    Power input

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    Cellular antenna

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

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

eTracker mini Sensor Module
eTracker Sensor Module

eTracker is the gateway between the sensors and the cloud. Data communication and IT infrastructure are merged under one user interface experience. eTracker was designed from the ground up to embrace the current and future trends of cloud-based remote data acquisition and the "Internet of Things" (IoT) revolution. This paradigm shift centralizes all the historically isolated processes of remote configuration, programming, logging, and telemetry. Configuration, logging, data processing and analysis is now done in the cloud, eliminating time and cost in programming and maintaining expensive, complex data loggers and communication devices at each remote location.

  • Cellular-based telemetry (GSM or CDMA) and station controller.
  • Direct Internet compliant data stream using HTTP/HTTPS.
  • Sensor measurements stored on easily-accessible SD card.
  • Cloud logging: 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.

eTracker embraces Stevens’ M2M (MEASUREMENTS TO MIND) vision: “What the sensors Measure, the Mind sees”!


Unique Features

  • Link sensors to the cloud: Sensor data is linked directly to the cloud-based Amazon service or user’s server via the cellular network using HTTP or HTTPS (optional FTP available).
  • 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 any device connected to the Internet via the cloud-based Stevens-Connect. No custom programming or scripts required.
  • Automated updates: Updates to firmware and cloud-based application can be automatic.
  • Security: Three user access levels for configuration, data management interface and visualization. Data is saved on SD card and on the secured and redundant Amazon Cloud Services. Optional data encryption available.
  • Connection verification: eTracker 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.
  • True cloud data service experience: Your data is sent directly and securely to the Amazon cloud- based service. No back-end database hosting or web server controlled by Stevens in which data flow takes a detour to the cloud.
  • Data format flexibility: Optionally forward data in various formats for third party so ware platforms, like Aquarius or WISKI, and in other formats such as binary, pseudo-binary, SHEF, and more.
  • Power control: Power cycle commands automatically initiated with the Stevens’ SOLO power management system.
  • Direct data access options: Third-party programs can access data using REST API or HTTP post.

Simple stations.

Interact with your system and your data from anywhere.

remote power cycling


Stevens-connect Dashboard

A cloud-based interface to configure hardware, visualize data, analyze measurements, manage alarms, calculations, and set up data routing.

Stevens-connect Dashboard

Dead simple setup and configuration.

Anytime, anywhere, any device.

All configuration and programming of the remote Cell-Net is done online via the cloud-based Stevens-Connect. Setup in 3 steps:


Connect to data logger


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 (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 antenna

External SMA

LED indicators

Power, cell network, test message

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

Current consumption

Listen/trigger mode/idle

<2 mA

Data receive/store/prepare for transmission

150 mA

Data transmit

250 mA


Input voltage

10 to 18 VDC (reverse polarity protection)

TX output power

24.3 dBm (270 mW)

Performance measurements

Battery and RSSI (signal strength), internal diagnostic log file

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


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)

Lightning protection

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


Dimensions (H x L x W)

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)


Cellular antenna


Sensor module interface

30-pin connector


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