Local control
A 3.5-inch TFT display and menu-driven sensor configuration, with access to calibration and operating settings.
Halogen D20
Connect MP5 or MP6 to a clear local display, configured outputs and site records.
Bring the sensor and operating team together.
D20 is the Halogen controller for local readings, sensor setup and connections to your monitoring system. Its colour display brings the configured residual and supporting water-quality information to the installation.
Use it with the blue MP5 or black MP6. The guides describe two sensor Modbus connections; PMA will confirm the supported combination, firmware and power loading for your installation.
Display, record and connect
Site signals
Four configurable 0–20 mA or 4–20 mA analogue outputs, three SPDT relays and standard Modbus RTU.
Recorded information
SD-card data storage and software transfer support. Define the channels, timestamps and record retrieval workflow.
A complete monitoring arrangement
The sensor measures the water. The controller displays and communicates the configured readings. The flow cell or mounting arrangement establishes which water reaches the sensing end.
Agree inlet and outlet routing, isolation, operating pressure, power, earthing, signal cabling and maintenance access together. The illustrated flow cell takes water in below and releases it above to let air leave.
Suitable in-pipe and immersion variants require their own installation assessment and accessories.
D20 specifications for planning
Enclosure
IP65 / NEMA 4X plastic enclosure; 160 × 160 × 101.6 mm. Choose a protected, accessible site position.
Power
The documented supply is 85–240 V AC ±10%, 50/60 Hz. Sensor power and controller loading must suit the configured system.
Interfaces
Two sensor Modbus connections, four analogue outputs, three relays and Modbus RTU. Agree the mapping before commissioning.
Environmental limits
Controller temperature limits depend on connected sensor load. Use the guide’s derating requirements rather than a single unconditional maximum.
Plan connectivity with the installation
Modbus RTU and analogue signals can connect the monitoring point to a suitable site system. Confirm addressing, scaling, status handling, loss-of-signal behaviour and who maintains the records.
Phone-app and remote access require a compatible communications arrangement. PMA will review the controller interface, network hardware and access requirements with you.
Meet the Halogen family
Choose the sensor for your water chemistry, then connect it to a controller and installation that suit the site.
MP5 · free chlorine
The blue self-cleaning sensor for free-chlorine measurement, with supporting water-quality information.
MP6 · monochloramine
The black sensor for monochloramine and free-chlorine measurement in suitable chloraminated water.
D20 · display and control
A colour display, configuration, analogue outputs, alarms and Modbus RTU connection for the monitoring system.
Downloads for your technical review
Read the manufacturer product guides for installation, operation, calibration and model-specific limits.
MP5 and D20 product guide
The supplied MP5 guide uses the MP5A model designation. PMA presents this model as MP5.
MP6 and D20 product guide
Operating modes, reference calibration, installation requirements and technical specifications.
Your questions, answered
Can D20 use any sensor power supply?
The supplied D20 specification describes an AC mains supply. The sensors use a different supply arrangement. A sensor-only or alternative controller installation needs a separate power and integration review.
Are alarms a complete protection system?
Configure alarms around the site’s documented operating response, including signal quality and communication loss. The controller alone does not establish a complete protection function.
Which sensors can connect to D20?
The supplied guides describe D20 use with MP5 and MP6. PMA will confirm the supported sensor combination, firmware and power loading for the installation.
What can operators see locally?
D20 presents the configured sensor readings on its colour display and provides menu-driven access to sensor setup, calibration and operating settings.
Can D20 connect to the site system?
Modbus RTU and analogue signals provide routes into a suitable plant monitoring system. Agree the fitted interfaces, addressing, scaling, status handling and loss-of-signal response before commissioning.
How should we plan data recording?
The documented arrangement includes SD-card storage and software transfer support. Define the channels, timestamps, retrieval method and who will maintain the records as part of the site review.
Looking after your world since 1971
PMA connects the measurement, installation and operating team. We help you review the application, select suitable instrumentation and plan commissioning, training and ongoing service.
Build your system
Start with your water chemistry. Choose the installation and connections, then see how your sensor and controller work together.
Self-cleaning. Reagentless.
Choose a sensor to begin
Find the right fit for your water.
Tell us about your disinfectant, water chemistry and installation. PMA can help you work through the sensor, controller and integration requirements.
Start a conversation.
01484 843 708sales@pma.uk.comBrook Mills House, Carr Lane
Slaithwaite, Huddersfield, HD7 5BG