Van London
Chlorine & Dissolved Oxygen Sensors – Precision Monitoring for Water and Process Control
Accurate, low-maintenance measurement for critical water quality parameters.
From process control to environmental compliance, reliable chlorine and dissolved oxygen monitoring is essential to maintain safe, efficient, and sustainable operations.
Van London’s Chlorine and DO sensors, developed by AlpHa Measurement Solutions, combine robust engineering with optical and amperometric technologies for long-term stability, low maintenance, and precision performance across industrial, municipal, and marine applications.
Chlorine Sensors (RC67 / RC68 Series)
Using proven amperometric technology, Van London’s free and total chlorine sensors deliver continuous, real-time monitoring for disinfection and process control.
Their proprietary internal fill gel ensures long-term signal stability and reduces calibration frequency — even in colored or contaminated water samples.
- Range: 0–2, 0–5, 0–10, or 0–20 ppm
- Accuracy: ±0.01 ppm resolution
- Outputs: 4–20 mA / 0–5 V analog or RS485 Modbus
- Temperature range: 0–50 °C; pH range: 6–9
- Flow: 30–60 L/h (for accurate sample control)
- Typical applications: drinking water, wastewater, cooling systems, swimming pools, and industrial effluent
These sensors are designed for integration with AlpHa Flow Cells and standard 1” O-ring seals, allowing easy installation in control panels or sub-systems.
Optical Dissolved Oxygen Sensors (ODO Series)
For dissolved oxygen measurement, Van London’s ODO sensors use luminescent quenching technology — eliminating the need for electrolyte filling or membrane cleaning. The optical method provides fast, stable readings with minimal maintenance and no warm-up time.
Key benefits:
- Measurement range: 0–20 mg/L (0–200% saturation)
- Accuracy: ±0.1 mg/L
- Output: RS485 / Modbus, 4–20 mA, 0–5 V
- Onboard temperature and pressure compensation
- Compact, corrosion-resistant design for lab, process, and field use
Both handheld and process configurations are available, supporting everything from on-site sampling to continuous process monitoring.
Designed for Your Applications
Water & Wastewater Treatment
Maintain disinfection efficiency and chlorine residual control in potable water systems and wastewater outflows. Van London chlorine sensors help ensure compliance while reducing chemical use.
Industrial & Process Applications
In cooling circuits, boilers, and closed-loop systems, real-time chlorine and DO monitoring protects assets, optimizes treatment, and prevents scaling or corrosion.
Environmental & Marine Monitoring
Dissolved oxygen sensors deliver critical insight into oxygen depletion, biological activity, and effluent impact in rivers, coastal zones, and shipboard systems.
Your Benefits
- Accurate real-time data for disinfection and aeration control
- Low maintenance – no electrolyte, no warm-up, long-life sensor caps
- Versatile output options for PLC and SCADA integration
- Compact, durable designs for field or in-line use
- Extended service life with replaceable membranes and caps
These products are used within these applications
Biogas
Gas analysis plays a crucial role in improving the efficiency of a biogas plant by providing real-time insights into the composition and flow of biogas.
Wastewater
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