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Metex StreamSentry – Water Analyzer and Control System


The MX StreamSentry is a plug-and-play solution for in-line water quality monitoring applications. Easily customizable to meet your specific needs, the StreamSentry offers free real-time data management and tracking of key performance indicators including flow rate, temperature, pH, total dissolved and suspended solids, corrosion, and more! For remote situations, a solar-powered version with cellular data has you covered, while multiple relay outputs allow for immediate control on out-of-spec measurements. Designed for ease of use, each unit ships fully assembled and pressure-tested, for quick installation in pipe sizes between ¾” to 4” and flow rates between 3 – 1100 GPM. Sensors can be accessed and calibrated without having to isolate the main supply or discharge lines, preventing any disruption to your operations.

Common applications include, but are not limited to:

  • Well and potable water quality
  • Sewer discharge permit compliance
  • Stormwater monitoring
  • Industrial processes (closed loops, cooling towers, wastewater, etc.)
  • Agricultural water management

MX StreamSentry side angle

Features of the MX StreamSentry

  • Operator-friendly industrial water treatment controller with datalogging, alarms, and full colour touchscreen display.
  • Remote connectivity and free data management dashboard. Can be used for multiple units to create a fleet view.
  • Mix-and-match sensors to meet your specific water quality needs. Easily swap or change sensor configurations at any time as needs change.
  • Designed for in-line installation, one inlet, one outlet
  • Discrete, lockable weather-proof enclosure available in either metallic or non-metallic variants. Custom colours available

Table 1 – StreamSentry Specifications

Specifications Details
Enclosure dimensions (L x W x H) 60” x 24” x 24.25”
Enclosure materials HDPE, UV protected (standard) or powder coated carbon steel (special order item).
Weight 100 lbs
Mounting Floor mounted, must be level.
Electrical requirements (standard version) 115 VAC +/- 10%, 50 or 60 Hz, 7 A maximum. System ships with a single USA pigtail connection and 6 ft of power cord.
Controller inputs/outputs Up to 4 sensor inputs, 4 analog inputs, 6 digital inputs, 6 relay outputs, 2 analog outputs, Ethernet, Modbus/TCP, BACnet.
Temperature limits (environmental) 40 to 131°F, 4 to 55 °C
Water flow requirements Minimum 3 GPM, maximum 1100 GPM*
Water temperature limits 40 to 120°F, 4 to 48°C
Water sample inlet/outlet connection ¾”, 1”, 2”, 3”, or 4” as specified by customer. Flange, FNPT or female camlock fittings available.
Water pressure-relief outlet connection Two ¾” FNPT connections are supplied for pressure and air relief.
Water pressure requirements Minimum 10 psig, maximum 150 psig.
Piping material Schedule 80 PVC
Sensor requirements Determined by sensor selection. Maximum four (4) sensor inputs + flow. Each unit includes one (1) magnetic flow meter.
Water quality requirements Determined by sensor selection. NSF requirements must be specified during ordering.

*Maximum flow rate determined by pipe size selected. See Table 2 for pipe size and flow requirements

Table 2 – Pipe size and flow requirements

Pipe Size Flow Rate Minimum Flow Rate Maximum
¾” 3 GPM 13 GPM
1” 3 GPM 26 GPM
2” 3 GPM 170 GPM
3” 4 GPM 700 GPM
4” 5 GPM 1100 GPM

Available Sensors

  • Free, total chlorine
  • Disinfectants (peracetic acid, chlorine dioxide, bromine, ozone, etc.)
  • pH
  • Conductivity, total dissolved solids
  • Flow (total, instantaneous)
  • Turbidity, total suspended solids
  • Oil-in-water
  • Level (ultrasonic or level switch)
  • Pressure
  • Temperature
  • Dissolved Oxygen
  • Refractive Index
  • ORP
  • Corrosion
  • Tagged Polymer (Fluorescent Dye)

MX StreamSentry interior

Typical Model Number

MX StreamSentry-A-075-F

  • Metex Stream Sentry with magnetic flow meter
  • Standard, 115 VAC
  • ¾” pipe size
  • Flanged Connections

MX StreamSentry top angle

Model Number Matrix