Biłgoraj Swimming Pool — ETFE skylight control and monitoring
Automation and remote monitoring system for the ETFE cushion at the Biłgoraj swimming pool. Pressure control, temperature and humidity measurement, online dashboard 24/7.
Structure
The municipal swimming pool in Biłgoraj features a roof skylight made from an ETFE cushion — a transparent, multi-layer film that transmits UV light. The ETFE cushion requires continuous air pressure maintenance in the 400–900 Pa range to maintain its proper form and load-bearing capacity.
Challenge
Commissioned by ABASTRAN, Ryzer designed and implemented a complete automation system for the ETFE cushion along with remote parameter monitoring. Unlike typical structural monitoring, this project required delivering a control cabinet with full automation — the system not only measures but actively controls cushion inflation.
Key requirements:
- Automatic pressure maintenance in the ETFE cushion within the specified range
- Fan control for pumping air into the cushion
- Continuous measurement of pressure, temperature and humidity
- Remote monitoring of operating parameters and device status
- Service mode for maintenance work
Solution
Control cabinet with automation
The system is based on a control cabinet installed on site, containing an ETFE controller with automatic control logic. The controller manages fan operation based on pressure readings — it starts pumping when pressure drops below the lower threshold and stops when the upper threshold is reached.
Measurement infrastructure
The system monitors three key ETFE cushion operating parameters:
- Pressure (Pa) — real-time cushion internal pressure measurement, operating range 400–900 Pa
- Temperature (°C) — air temperature around the cushion, important for pressure compensation
- Humidity (%RH) — relative humidity affecting ETFE material properties
Additionally, the system records actuator states:
- Fans — relay control status for fans (On/Off)
- Service button — service mode enabling manual control during maintenance
Platform and visualisation
Data is presented on a Grafana dashboard with real-time gauge views and historical charts for pressure, temperature and humidity. The dashboard enables remote monitoring of the system status without an on-site visit.
Results
- Automatic 24/7 ETFE cushion pressure maintenance
- Remote monitoring of operating parameters and device status without site visits
- Recording of system operation history — pressure, temperature, humidity
- Service mode for safe maintenance
- Elimination of ETFE cushion damage risk from pressure loss