SC4500 Controller
Universal controller for HACH digital and analogue sensors: the hub of Blue Drop and Green Drop panels.
- mA
- outputs
- Digital
- protocols
- Remote
- access
Online & process monitoring
Measure. Report. Control. Around the clock.
From a single replacement sensor to a complete, engineered monitoring system with panels, communications and remote dashboards.
Continuous monitoring catches problems between grab samples: filter breakthrough, chlorine loss, aeration faults and effluent excursions. We supply individual sensors and controllers, and we deliver complete systems: Blue Drop and Green Drop panels, sample conditioning, enclosures, power and UPS, and the Liquid Science IoT platform. Its locally designed THREADbridge and AiR devices carry readings to a live cloud dashboard with alarms, so compliance is visible without waiting for laboratory results.
The Blue Drop panel
A complete measuring package, not a box of parts
We assess your plant, your process and your compliance targets, then build one panel that measures everything that matters at that point. Connected to the Liquid Science IoT platform, it reports to a live dashboard with alarms.
| Controller | HACH SC4500 |
|---|---|
| pH | 0–14 |
| Conductivity | 0–2 000 µS/cm |
| Turbidity (TU5300) | 0.01–40 NTU |
| Chlorine (CL17sc) | 0–5 mg/L Cl₂ |
| Pressure | 0–150 psi (0–10.3 bar) |
| Temperature | −20 to 200 °C |
Blue Drop panel · WTW-01SC4500 → THREADbridge → AiR → cloud dashboard
- pHSANS 241: 5.0–9.77.62In range
- TurbidityTU5300 · limit ≤ 1 NTU0.18NTUIn range
- Free chlorineCL17sc · limit ≤ 5 mg/L0.64mg/LIn range
- Conductivitylimit ≤ 1 700 µS/cm412µS/cmIn range
- PressureNetwork outlet3.1barNormal
- TemperatureSample18.4°CNormal
SANS 241 limits · Blue Drop evidenceUpdated just now
Demo data showing how readings, SANS 241 limits and alarms appear on the dashboard.
How the data flows
From sensor to screen in four layers
The Liquid Science IoT solution is designed, developed and built in South Africa, and connects any instrument with an output.
- 01
Measure
HACH online analysers and sc sensors and Colifast ALARM on your process lines.
- 02
Connect
Kreon THREADbridge links existing wired sensors on a secure wireless mesh: up to 250 radios, about 500 m, no new cable runs.
- 03
Route
The AiR Advance IoT Router acquires the data out of the box and forwards it securely to the cloud.
- 04
Report & act
Live dashboards customised to your site, with alarms and notifications before readings go out of specification.
Kreon Technology
THREADbridge Wireless Sensor Network
Secure wireless network for wired devices: retrofit existing sensors and send their data to the cloud.
View AiR (Advance IoT Router)AiR Advance IoT Router
Out-of-the-box IoT data acquisition: connect instrument outputs and send data securely to the cloud.
View HACHBlue Drop Distribution Monitoring Panel
Pre-engineered drinking-water distribution panel: pH, conductivity, turbidity, chlorine, pressure and temperature on one SC4500.
ViewMeasurement points through a water-treatment works
Raw water intake
Coagulation & flocculation
Clarification
Filtration
Disinfection
Reservoir & distribution
Components
Sensors and analysers we build panels with
CL17sc Colorimetric Chlorine Analyser
Online DPD analyser for free or total chlorine in drinking water.
- DPD
- method
- 0–5
- mg/L Cl₂
- Free/total
- models
TU5 Series Online Laser Turbidimeters
Low-range online turbidimeters (TU5300sc, TU5400sc) for filter and final-water monitoring.
- Laser
- low range
- 360°
- detection
- Filter
- breakthrough
Process pH, ORP & Conductivity Sensors
Digital sc and analogue process sensors for pH, ORP and conductivity in clean to heavily fouling streams.
- pH
- ORP · EC
- Plug
- & play
- Digital
- sc sensors
LDO sc Luminescent Dissolved Oxygen Sensor
Optical DO sensor for activated-sludge aeration control, with no membranes or electrolyte.
- Optical
- DO
- No
- membranes
- Energy
- saving control
How a project runs
A project partner, not only a supplier
For turnkey projects we take responsibility from specification through to a working, supported system.
- Site visit and measurement requirement review
- Technology selection across brands
- Panel and system design, with documentation
- Build, installation and commissioning
- Integration with PLC, SCADA or cloud dashboard
- Operator training, handover and ongoing service
Projects
Recent installations
Monitoring panels and telemetry installed and supported by the Liquid Science team.
Planning a panel or telemetry upgrade?
We assess the site and your compliance targets, then design, build, commission and support the panel locally.
Products
Product categories
Online & Process Sensors
Continuous sensors for pH, conductivity, turbidity, DO, nutrients and more.
BrowseControllers & Data Systems
Controllers, data acquisition, telemetry and dashboards.
BrowseChlorine & Disinfection Monitoring
Free and total chlorine, from pocket colorimeters to online analysers.
BrowseBrands
Brands we distribute
Planning a panel or telemetry upgrade?
Tell us about the site, the parameters and how you report. We will propose a panel, telemetry and dashboard, and quote.