Reading Tank Level with the Growlink Batch TankLINK Level Sensor
The Growlink Batch TankLINK Level Sensor floats a serpentine pontoon directly in the nutrient tank. The pontoon's shape lets the assembly drop through narrow tank openings without disassembly. As the liquid line rises and falls, the float stays in contact with the water. The transducer translates that movement into a 4–20mA signal. A Molex connector carries the signal to the controller's level input. That feed drives the TankLINK's refill logic and overfill alarms. The controller can call a fill pump on or trip an alert before the tank crosses either threshold.
Wiring the TankLINK Level Sensor into the Same Tank as pH, EC, and Temp
Most growers position this TankLINK level sensor in the same tank that already holds the pH, EC, and temperature probes. A single Batch TankLINK runs all four inputs from one board. The 4–20mA output is the standard analog type the controller's level input expects. The nutrient tank level sensor wires in with no protocol conversion. Plug-and-play installation keeps a sensor swap to a few minutes during tank teardown. Lift the pontoon, unplug the Molex, drop in the new unit, and the controller picks the reading back up at the next sample cycle. Tank cleaning between runs is the most common time to inspect the pontoon for scale buildup. A wipe with a soft cloth keeps the batch tank level sensor reading honest across the next harvest cycle. The continuous 4–20mA reading also pairs with the controller's logged history for season-over-season fill-rate analysis. That helps spot a slow leak or a clogged refill solenoid before the next crop suffers a dry-tank hour.
Key Features
- Serpentine Pontoon Float: Drops through narrow tank openings without disassembly and stays in contact with the liquid surface.
- 4–20mA Analog Output: Standard signal type wired straight into the Batch TankLINK controller's level input.
- Molex Connector Wiring: Plug-and-play swap during teardown — unplug, lift, replace, plug back in.
- Automated Refill + Overfill Logic: Feeds the controller's level thresholds for pump triggers and alert calls before the tank crosses either.
- Continuous Level Tracking: Real-time reading across the full tank stroke, not just point-level high/low switches.
Technical Specifications
| Specification | Value |
|---|---|
| Sensor Type | Float / serpentine pontoon |
| Output Signal | 4–20mA analog |
| Connector | Molex (1× 4–20mA input on controller) |
| Measurement Mode | Continuous level tracking |
| Function | Refill triggering, overfill alarms, dry-tank protection |
| Compatible Controller | Growlink Batch TankLINK (alongside pH, EC, Temp inputs) |