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Stevens Water Monitoring Systems, Inc.
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Stevens - Model All-In-One -Steelhead Datalogger / Data Acquistion Platform

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Steelhead is advancing the Internet of Things (IoT) data acquisition experience by offering a low-power, all-in-one, patented solution. With support for multiple Stevens or third-party sensor inputs—including Modbus RTU over RS-485, SDI-12, and digital/pulse signals—the Steelhead functions as a reliable data logger and acquisition platform. It features two-way communication capabilities via global Tier 1 cellular networks, ensuring seamless data transfer and remote management between sites and centralized systems. The device is easy to install, operate, and manage, with data collection and analysis facilitated through the Steelhead mobile app via Bluetooth or the SkyView360 cloud-based platform or third-party data management platforms.
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All-In-One Compant Design

  • IP-68 (waterproof) enclosure
  • Waterproof sensor connectors
  • Integrated high-efficiency (MPPT) solar regulator
  • Enhanced power surge and lightning protection
  • Built-in GPS, internal barometric, humidity, and temperature sensors
  • Includes internal batteries and antennas

Communications

  • Integrated 4G Cellular with global coverage via an included SIM card
  • Reporting to SkyView360 or a third-party server via HTTP/ HTTPS, FTP, or both
  • Data logger (no cellular connectivity) is an available option
  • Report immediately based on sampled data
  • Alarm conditions with auto change of logging and reporting frequency during event

Power Supply Options

  • Battery  Only, 
    • 3 year internal battery life (assume 15 min loggin, twice per day reporting, two sensors)
    • Integrated 28 Ah non-rechargable battery
  • Solar Panel
    • Integrated with a 10.5 Ah rechargable battery and a 28 Ah non-rechargable battery
    • Integrated battery charge regulator
    • Up to a 40 watt solar pannel 
  • External Power
    • 7 to 16 VDC / 3 amp power from an AC/DC adapter or external battery
    • Included integrated 10.5 Ah recharagel battery
    • AC/DC adapter or external battery optional

Mobile App

  • Connect via Bluetooth (BLE)
  • Configuration: add/change sensors, reporting/sampling interval, and more!
  • SDI-12 Transparent mode: talk directly to the sensor for diagnostics
  • Current readings: take an immediate reading
  • Download stored data

SkyView360 (fna Stevens-Connect)-Integration

  • Configuration: add/change sensors, reporting/sampling interval, and more!
  • Create interactive dashboards with multiple stations and parameters
  • Notifications on measurement thresholds via text and/or email
  • Remote troubleshooting: battery voltage and percentage, cell signal strength and network, remote power cycling
  • Over-The-Air (OTA) firmware updates
  • Environmental monitoring
  • Water resources
  • Weather
  • Tide gauging
  • Soil management
  • Stormwater
  • Tank levels
  • Open and close channel flow
  • Bioremediation
  • Scientific Research
  • Precision agriculture and horticulture
  • Golf & sports turf management (www.turfpro.com)

Sensor Data

  • Logging Interval: Configurable from 1 minutes to 24 hours
  • Reporting Interval: Configurable from 5 minutes to 24 hours
  • On-board storage: 400,000 records typical. depending upon the sensor type

Data Memory

  • 64MB Flash memory: Non-volatile Flash Memory, complete data retention with loss of power

Sensor Interface

  • Supported sensor types:
    • SDI-12 bus
    • Modbus RTU over RS-485
    • 2 Pulse inputs, individually configurable as low speed (<100Hz) or High speed (KHz)
  • Sensor Connectors: 3 x M12 A connectors. Connect more sensors using split cables or break-out box
  • Sensor Power Supply: Switched
  • Power Output for Sensors: 12V DC with max. current source 200mA
  • Parameters: 30 sensor parameters in total
  • Number of Sensors: 10 ~ 20, based on the current consumption and number of parameters
  • Internal Barometric Sensor
    • Range 300 to 1250 hPa | 12-month long-term stability: ±0.33 hPa
    • Absolute accuracy pressure (typ.): +/- 0.5 hPa; P=900 ...1100 hPa (T=25° to 40°C)
    • Relative accuracy pressure (typ.): ±0.08 hPa, P=900…1100 hPa (T=25° to 40°C)

Communications

  • Cellular: 4G LTE or Cat-M
  • Antenna
    • Internal antenna: 698-875 MHz (1.9 gain) or 1710 – 2500 MHz (3.7 gain)
    • Options: SMA connector for external antenna
  • Mobile App communication: BLE 5.0 Bluetooth low energy protocol
  • GPS: GPS, GLONASS, BeiDou/Compass, Galileo and QZSS

Mechanical/Environmental 

  • Dimensions: 240 mm x 170 mm x 60mm (9.44 in x 6.7 in x 2.3 in)
  • Enclosure Material: UV-resistant polymer
  • Ingress Protection: IP-68 (dust proof and waterproof up to 1 meter immersion for 30 minutes)
  • Operating Temperature: -40°C ~ +80°C (-40°F ~ +176°F)
  • Lightning and Power Protection:
    • Dedicated grounding lug
    • Each input, output, and sensor power line has isolated gas discharge tubes, series current limiters, transient voltage suppressors (TVS), electrostatic discharge, electrical fast transient and lightning surge protection