Boiler controller
monitoring
Temperature, pressure, firing state and alarms from boiler and burner controllers, read through an isolated Modbus connection so the safety system keeps full authority over the boiler.
THE PROBLEM
A boiler in lockout is a process stopped somewhere else
Steam and hot water boilers feed laundries, kitchens, process lines, sterilisers and heating loops. When a burner locks out on flame failure or low water, the boiler house may be empty, and the first sign is a laundry without steam or a process that cannot reach temperature.
Boiler and burner controllers typically hold steam pressure or flow temperature, firing rate, burner state and the lockout code. Many offer a Modbus interface for exactly this purpose. Getting those values to the people who respond turns an unexplained stoppage into a called-out fault with a reason.
HOW WE SET IT UP
Read the boiler, leave the safety chain alone
Isolated Modbus connection
The gateway connects to the controller's Modbus port through an isolated RS485 or Ethernet link, so a wiring fault on the monitoring side stays on the monitoring side.
The safety system stays in charge
Flame safeguard, low-water cut-off and pressure limits remain wired and approved exactly as they are. The gateway reads data and is configured for read access to the controller.
Lockouts with their reason
Lockout and alarm codes are read with their time and sent to the boiler attendant or service company by call, SMS or WhatsApp, so they arrive knowing what tripped.
Trends for the service visit
Pressure, temperature and firing history show short cycling, slow pressure recovery or frequent lockouts, which gives the service engineer evidence before opening the burner.
AT A GLANCE
Boiler monitoring in brief
- What is read
- Steam pressure or water temperature, firing state, burner status and lockout or alarm codes where the controller exposes them
- Hardware
- RS485 Modbus IoT gateway, Modbus RTU over RS485 and Modbus TCP over Ethernet, master or slave
- Connection
- Isolated Modbus RTU or TCP link to the boiler or burner controller
- Connectivity
- Ethernet, Wi-Fi or 4G, chosen per site. MQTT over TLS 1.2
- Where data goes
- RIOD Live, or your own server, with API access, PDF and Excel exports with audit trails, and AI access through MCP
- Alerts
- Lockout, high pressure and high temperature through SMS, call, WhatsApp or email
- Safety
- Burner management and boiler safety devices keep sole authority. Monitoring is read access
FAQ
Questions buyers ask us
Can a boiler be monitored remotely over Modbus?
Yes, where the boiler or burner controller has a Modbus interface. The gateway reads pressure or temperature, firing status and lockout codes, and sends alerts to the people responsible.
Does remote monitoring affect boiler safety?
It is designed to leave safety untouched. The flame safeguard, low-water and pressure limits stay wired and approved exactly as they are, the Modbus connection is isolated, and the gateway is configured to read.
Can we get an alert when the boiler goes into lockout?
Yes. The lockout status and code are read from the controller and sent by phone call, SMS, WhatsApp or email to the people you name, with the time of the event.
Can several boilers in one plant room share a gateway?
Yes. Controllers on the same RS485 line each have their own Modbus address, and the gateway polls them in turn. We check the controller addresses and register maps during the survey.
Want to know when a boiler locks out?
Tell us the boiler and burner controller models and who responds today. We will confirm what can be read and how the alerts reach them.