Product Overview

The Messenger SMB is a packaged system designed to provide a rugged, outdoor monitoring system for remote or unattended facilities. The SMB reports to Antx’ Centurion web-based system for mobile and PC access.

Each SMB system includes:

  • Small weatherproof enclosure with handle for easy carrying,
  • Cables for level sensor, pulsing flow meter, Modbus smart sensors and solar panel,
  • Backup battery and solar charger,
  • Active LTE 4G cellular-based Messenger telemetry unit with external high-gain antenna and GPS,
  • Magnets for mounting to metal surfaces and
  • Pre-configured Centurion web-based monitoring, alarming and remote access system.

The SMB has M12 panel mount connections for:

  • Digital on/off conditions
  • Pulsing flowmeters
  • 4-20ma input (level, pressure, flow, etc)
  • Modbus RTU (flowmeters, water quality, PLCs, etc.)
  • Solar panel or DC input
  • External cell antenna

Typical applications include:

  • Impoundment level monitoring
  • Flow meter monitoring
  • Water quality sondes and sensors (YSI, In-Site, Ott, Global Water, etc.)
  • Remote control of electric pumps, motors, VFDs and soft starters
  • Diesel-driven generators with electronic controls
  • Controllers supported via Modbus include: DynaGen, DeepSea, ComAp, Generac, Basler, Kohler


  • For level measurement, the SMB is equipped with a 4-20ma analog input that typically is used with a pressure sensor placed in the impoundment of water.
  • For level measurement of brine or produced water, the SMB is equipped with a powered Modbus connection to use with sensors that provide information to adjust the level measurement based on the density of the liquid.
  • For pulsing flow meters, a digital/pulsing input is provided to convert pulses into flow rate, daily flow volume and total job volume.
  • For Modbus flow meters, forward flow and total flow volume are monitored and reported.
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Dimensions: 12”L x 9”W x 6”D

  • Pressure relief valve for altitude changes
  • Mounting magnets

Operating temperature: -40C to +80C, -40F to 176F

Solar controller:

  • input voltage range 12-24V
  • user interface for: solar panel input voltage, load voltage, battery voltage, high and low battery charge shutoff

Modbus RTU Master serial port:

  • RS485
  • adjustable baud rate from 1200 to 115200
  • supports 80 Modbus registers
  • read holding, register, coil, status

Digital inputs:

  • contact closure to ground or voltage input
  • pulse detection 100ms and greater

Analog input:

  • 4-20ma standard, 0-1V, 0-5V, 0-10V, 0-20ma
  • 12VDC power provided by SMB

Digital output:

  • switch to ground
  • 2A at 12VDC
  • current limited
  • Solar panel – 10W, 20W, 30W, 40W with mount
  • High gain omni antenna with pole or magnet mount
  • Impoundment level sensors for various depths and lengths
  • Line pressure sensors – various PSI ratings
  • Sensor M12 extension cables

Messenger-SMB Datasheet