BLU Sentinel SE Aquatics Analyzer-Controller

Summary

Product identification

• Product Name: BLU Sentinel SE Aquatics Analyzer-Controller
• Product Line: Wallace & Tiernan Analyzers - Controllers

Benefits

• Measures 4 disinfection parameters: free chlorine, ORP, pH, and temperature.
• Integrated web views for visualization and operation of up to four pools via web-enabled devices.
• 4” color touch screen for intuitive operation.
• Utilizes robust Strantrol® HRR/pH probes.
• LED-backlit flow cell for quick status indication.
• Potential for up to 30% chemical savings through automated chemical feed.
• Switch between ORP and free chlorine for control as desired.
• Ethernet communication.

Design and Function

The Blu-Sentinel™ SE controller measures pool water free chlorine concentration, temperature, ORP, conductivity, and pH. It features a color touch-screen display and a color-based status indicator in the flow cell (white = good, yellow = check parameters, red = fault). The controller provides chemical feed outputs for free chlorine or ORP, as well as for pH and conductivity setpoints.

The system includes a pressurized flow cell for up to four sensors and electronics. It features an integral "Multi-Sensor" for sample water flow and temperature measurement, with a large water ground for electrical noise protection. A flow control valve ensures constant sample water flow, and quartz grit provides hydro-mechanical cleaning for the free chlorine sensor. An LED light stick in the flow cell indicates pool water chemistry status.

Standard features include various controller outputs, alarm contacts, four optional analog 0/4–20 mA outputs, and five digital inputs. Six freely assignable relay contacts can be configured as chemical feed or alarm outputs. Built-in safety functions include:

• Alarm and chemical feed interruption triggered by the sample water flow switch.
• Alarm and chemical feed interruption in case of circulation pump failure.
• Shutdown in case of supply-tank-empty alarm.
• Dosing time monitoring and delay.

Plug-in sensors, pre-wired cables, and modular mounting facilitate fast installation, start-up, and maintenance.

Measurement Inputs

Free chlorine

• Rugged 3-electrode Strantrol® Pool chlorine sensor with sealed electrolyte KCl supply.
• Potentiostatic 3-electrode amperometric design.
• Measuring range: 0 to max 10 mg/l, adjustable in 1 mg/l steps.
• Resolution: up to 10 mg/l: 0.01 mg/l.
• Temperature compensation: 0 – 50 °C.
• Sensor plug connection: IP 67.

pH value

• Measuring range: 0 to 10 pH.
• Start of range adjustable: 0 to 5.
• End of range adjustable: 9 to 10 pH.
• Scale freely selectable in 1 pH increments.
• Resolution: 0.01 pH.
• Temperature compensation: 0 – 50 °C.
• Sensor plug connection: IP 67.

ORP

• Measuring range: 0 to 1000 mV.
• Start of range: 0 to 400 mV.
• End of range: 500 to 1000 mV.
• Scale freely selectable in 100 mV steps.
• Resolution: 1 mV.
• Sensor plug connection: IP 67.

Conductivity

• Robust 4-electrode measuring cell with integrated temperature sensor.
• Measuring ranges: 500/1000/2500 µS/cm or 5.00/10.0/20.0/50.0/100.0/200.0/300 mS/cm.
• Temperature compensation: 0 - 50 °C.
• Plug connection.

Multi-sensor

• Measures sample water temperature via Pt 1000 sensor.
• Protection against external electrical noise via a stainless steel sleeve (earthing of sample water).

Display

• 4.3 inch capacitive color touchscreen with backlight.

Digital inputs

• 1 x assigned to sample water flow switch.
• 4 x freely selectable (e.g., chemical tank empty, external stop).

Output contacts

• 6 x freely selectable alarm contacts/general alarm signal as well as controller outputs for free chlorine, ORP, and pH.
• Relay status is depicted on the operating display.
• Max. 3.15 A/250 V AC, 0.2 A/220 V DC.

Analog outputs (optional)

• 4 x 0/4 – 20 mA, freely configurable.
• Load protected ≤ 500 Ohm.
• Accuracy < 0.5 % FS.
• Galvanically isolated up to 50 V relative to earth.

Electrical

• Power supply: 100 - 240 V AC ± 10 %, 50 – 60 Hz.
• Power consumption: 14 W.

Environmental and Physical

• Ambient temperature: 0 – 50 °C.
• Enclosure: IP 66.
• Testing and marking: CE, UL & CSA, NSF 50.
• Dimensions (W x H x D): 320 x 311 x 135 mm (12.5 x 12 x 5 inches).
• Weight (incl. packing): approx. 5 kg (11 lbs).

Flow Cell Module

Flow control valve

• Controlled sample water flow: 33 l/h.
• Control range: 0.2 – 3.0 bar at valve inlet (3 – 43 psig).
• Maximum back pressure: From pressureless up to 1.5 bar at valve outlet (0 to 22 psig).
• Maximum sample water temperature: 50 °C.
• LED alert (white, yellow, and red).

Additional features

• Sample water valve.
• Isolating valves at sample water inlet and outlet of the flow block module (pressurized design).
• Ball check valve at sample water inlet.
• Simple cell drain assembly.
• Integrated fitting to hold sensor during calibration.

Sample water connections

• PVC hose 6 x 3 mm or PE hose 6 x 1 mm.
• Hose connectors on 1/2 ” union.

Physical Characteristics

• Weight (incl. packing): approx. 2.5 kg (5.5 lbs).
• Dimensions (W x H x D): 253 x 375 x 163 mm (10 x 15 x 6 inches).

Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror