// Smart Water Tank Controller AquaCtrl monitors and controls every tank in your system.

Centimeter-grade ultrasonic level sensing.

Ultrasonic probe mounted in the tank lid, ranging continuously at 40 kHz. The firmware applies temperature compensation and a 5-sample median filter — so wave action, splashes, and short-term turbulence don’t move the reading.

• 01
  ±1 cm accuracyFrom 200mm to 4500mm range — covers tanks 250L through 25,000L without calibration
• 02
  Temperature compensatedOnboard temperature sensor corrects speed-of-sound for tank ambient (–10 °C to 60 °C operating range)
• 03
  5-sample median filterWave action and momentary obstructions are rejected before publishing telemetry

Pump + valve control with edge protections.

40A solid-state relay drives the motor pump. Solenoid relays drive inlet and outlet valves. Auto-fill setpoints, manual override, scheduled runs — all enforced in firmware so a lost network connection never compromises safety.

• 01
  Dry-run protectionNo flow detected after 5 min of pump runtime → automatic shutoff, dispatched alert
• 02
  Overflow cutoffHard-coded 95% high limit overrides any setpoint or manual command
• 03
  Voltage / current windowsConfigurable 180–260V and 0–8A guardrails. Out-of-window for 3 s → relay opens
• 04
  Max runtime ceilingUser-configurable 1–120 min pump cap, prevents thermal damage on faulty sensors

MQTT/TLS to the Velonics One PWA.

WSS over port 8084 to our cloud MQTT broker. Retained last-will-and-testament for online/offline state. QoS 1 for commands. Connection-loss buffering for up to 24 hours of telemetry.

• 01
  SoftAP provisioningFirst boot creates “AC100_XXXXXXXX” access point. Connect from phone, scan QR, hand off home WiFi credentials. ~90 seconds end-to-end.
• 02
  OTA firmware updatesSigned, staged rollouts from Velonics OTA service. Boot-loop detection auto-rolls back.
• 03
  250 ms p50 telemetry latencyLevel, voltage, current, runtime, motor state — published every 1 s while active

Industrial-grade enclosure.

IP65-rated ABS housing with cable glands and gasketed lid. DIN-rail mount option for switchboards. WS2812 status LED, BOOT button for factory reset, USB-C for field-service debug.

• 01
  IP65 ingress protectionSuitable for outdoor pump-house deployment. Operating temp –10 °C to 60 °C.
• 02
  240V SMPS isolated input12V isolated bus, 5V logic, 3.3V SoC. 5000V isolation barrier between mains and signal.
• 03
  Surge + reverse protectionTVS diodes on every input line, polyfuse on supply, redundant MOVs across mains.