--- title: "Wiring diagrams for tank monitoring" slug: "wiring-diagrams-for-tank-monitoring" updated: 2026-09-08T12:03:24Z published: 2026-09-08T12:03:24Z canonical: "docs.calculus.group/wiring-diagrams-for-tank-monitoring" --- > ## Documentation Index > Fetch the complete documentation index at: https://docs.calculus.group/llms.txt > Use this file to discover all available pages before exploring further. # Wiring diagrams for tank monitoring ## Digital Matter Hawk ### 4-20mA sensor Connecting a 4-20mA sensor using BD 18.605G or a 4-20mA plug-in board. RS-1: BD 18.605G4-20MA: BD 18.605GRatiometric sensor #### Model: RS-1 - BD 18.605G wiring instructions - White wire (Voltage) → I/O2 +VBOOST OUT - Brown wire (4-20mA) → I/O9 4-20mA > [!WARNING] > Check the model! > > These wiring instruction are solely for model: RS-1. You can find your model type printed on the circuit bord. ![Hawk plug-in board model RS-1 with various input and output connections labeled.](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/image-1756802409863.png?sv=2026-02-06&spr=https&st=2026-10-31T00%3A04%3A46Z&se=2026-10-31T01%3A04%3A46Z&sr=c&sp=r&sig=1jugzrGL9OBgIK8vBJsxKvLntDhmrD2gKAGRO9qOndY%3D) > [!CAUTION] > Attention! > > The following information, regarding the 4-20mA sensor combined with Ratiometric sensor, is no longer applicable. We will try our best to provide you with the correct information as soon as possible. #### Ratiometric sensor wiring instructions (AdBlue tank) - Black wire (Voltage) → I/O2 +VBOOST OUT - Brown wire (4-20mA) → I/O9 4-20mA ![Hawk plug-in board model RS-1 with various input and output connections labeled.](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/image-1756802696179.png?sv=2026-02-06&spr=https&st=2026-10-31T00%3A04%3A46Z&se=2026-10-31T01%3A04%3A46Z&sr=c&sp=r&sig=1jugzrGL9OBgIK8vBJsxKvLntDhmrD2gKAGRO9qOndY%3D) #### Ratiometric sensor wiring instructions (Diesel tank) - Green wire (Data) → I/O1 AIN1 - Black wire (Voltage) → I/O5 +3.3V OUT - Brown wire (GND) → I/O6 SWGND ![Hawk plug-in board model RS-1 with various input and output connections labeled.](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/image-1756803010345.png?sv=2026-02-06&spr=https&st=2026-10-31T00%3A04%3A46Z&se=2026-10-31T01%3A04%3A46Z&sr=c&sp=r&sig=1jugzrGL9OBgIK8vBJsxKvLntDhmrD2gKAGRO9qOndY%3D) #### Model: 4-20MA - BD 18.605G wiring instructions (multiple tanks) - Brown wire (4-20mA): sensor 1 → I/O1 - IN - Brown wire (4-20mA): sensor 2 → I/O3 - IN - Brown wire (4-20mA): sensor 3 → I/O5 - IN - Brown wire (4-20mA): sensor 4 → I/O7 - IN - White wire (Voltage) → I/O9 +VBOOST OUT Use a Wago clamp to connect the different cables. Attach the white cables of the different pressure sensors in this clamp, as well as a separate white cable that you will use for the voltage as listed above. > [!WARNING] > Check the model! > > These wiring instruction are solely for model: 4-20MA. You can find your model type printed on the circuit bord. ![Hawk plug-in board with labeled input and output connections for 4-20mA signals.](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/image-1761120530907.png?sv=2026-02-06&spr=https&st=2026-10-31T00%3A04%3A46Z&se=2026-10-31T01%3A04%3A46Z&sr=c&sp=r&sig=1jugzrGL9OBgIK8vBJsxKvLntDhmrD2gKAGRO9qOndY%3D) ### Ratiometric Connecting a Ratiometric using BD sensor 5V, Huba sensor 3.3V or Keller sensor 3.3V. Keller sensor 3.3VBD sensor 5VHuba sensor 3.3V #### BD sensor 5V wiring instructions - Green wire (Data) → I/O1 AIN1 - White wire (Power supply 5V) → I/O2 +VBOOST OUT - Brown wire (GND) → I/O6 SWGND ![Hawk plug-in board model RS-1 with various input and output connections labeled.](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/image-1756800434716.png?sv=2026-02-06&spr=https&st=2026-10-31T00%3A04%3A46Z&se=2026-10-31T01%3A04%3A46Z&sr=c&sp=r&sig=1jugzrGL9OBgIK8vBJsxKvLntDhmrD2gKAGRO9qOndY%3D) #### Huba sensor 3.3V wiring instructions - Green wire (Data) → I/O1 AIN1 - Brown wire (Power Supply 3.3V) → I/O5 +3.3V Out - White wire (GND) → I/O6 SWGND ![Hawk plug-in board model RS-1 with various input and output connections labeled.](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/image-1756801739853.png?sv=2026-02-06&spr=https&st=2026-10-31T00%3A04%3A46Z&se=2026-10-31T01%3A04%3A46Z&sr=c&sp=r&sig=1jugzrGL9OBgIK8vBJsxKvLntDhmrD2gKAGRO9qOndY%3D) #### Keller sensor 3.3V wiring instructions - Red wire (Data) → I/O1 AIN1 - Black wire (Power supply 3.3 V) → I/O5 +3.3V Out - White wire (GND) → I/O6 SWGND ![Hawk plug-in board model RS-1 with various input and output connections labeled.](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/image-1756802172972.png?sv=2026-02-06&spr=https&st=2026-10-31T00%3A04%3A46Z&se=2026-10-31T01%3A04%3A46Z&sr=c&sp=r&sig=1jugzrGL9OBgIK8vBJsxKvLntDhmrD2gKAGRO9qOndY%3D) ### Watermeter Connecting a watermeter using Reed switch or H2Q. Reed switchH2Q #### Reed switch wiring instructions - Green wire → I/O7 DIN1 - White wire → VIN ![Hawk plug-in board model RS-1 with various input and output connections labeled.](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/image-1756801042209.png?sv=2026-02-06&spr=https&st=2026-10-31T00%3A04%3A46Z&se=2026-10-31T01%3A04%3A46Z&sr=c&sp=r&sig=1jugzrGL9OBgIK8vBJsxKvLntDhmrD2gKAGRO9qOndY%3D) #### H2Q wiring instructions - Red wire → I/O7 DIN1 - Blue wire → GND - Black wire (Battery) → GND ![Hawk plug-in board model RS-1 with various input and output connections labeled.](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/image-1756799942732.png?sv=2026-02-06&spr=https&st=2026-10-31T00%3A04%3A46Z&se=2026-10-31T01%3A04%3A46Z&sr=c&sp=r&sig=1jugzrGL9OBgIK8vBJsxKvLntDhmrD2gKAGRO9qOndY%3D) ### Other applications Connecting a Siemens MAG8000 Modbus, 1-Wire, 0-10V float switch or a Rochester sensor. **Rochester sensor** #### Rochester sensor wiring instructions - Black wire (GND) → I/O1 SWGND - Black wire (fuel sensor) → I/O5 AIN1 - Black wire (adBlue) → I/O6 AIN2 ![](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/image-1784127565923.png?sv=2026-02-06&spr=https&st=2026-10-31T00%3A04%3A46Z&se=2026-10-31T01%3A04%3A46Z&sr=c&sp=r&sig=1jugzrGL9OBgIK8vBJsxKvLntDhmrD2gKAGRO9qOndY%3D) ## Digital Matter Eagle Connecting the supplied sensor to the gateway. #### Supplied sensor wiring instructions - White wire (Vs+) → VOUT (right side of the module) - Brown wire (Vs-) → 4-20mA 1 (left side of the module) ![](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/image-1760534378841.png?sv=2026-02-06&spr=https&st=2026-10-31T00%3A04%3A46Z&se=2026-10-31T01%3A04%3A46Z&sr=c&sp=r&sig=1jugzrGL9OBgIK8vBJsxKvLntDhmrD2gKAGRO9qOndY%3D) ## Digital Matter Falcon Connecting the BD or HUBA sensor to the gateway. BD sensorHUBA sensor #### BD sensor wiring instructions - Green → A-IN1 - Brown → GND - White → 3.3V ![Energizer batteries installed in a Falcon device with visible connections and indicators.](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/image-1760536665533.png?sv=2026-02-06&spr=https&st=2026-10-31T00%3A04%3A46Z&se=2026-10-31T01%3A04%3A46Z&sr=c&sp=r&sig=1jugzrGL9OBgIK8vBJsxKvLntDhmrD2gKAGRO9qOndY%3D) #### HUBA sensor wiring instructions - Green → A-IN1 - White → GND - Brown → 3.3V ![Energizer batteries installed in a Falcon device with visible connections and indicators.](https://cdn.document360.io/94d0a983-5058-4b02-8d06-1228a999a7a1/Images/Documentation/image-1760537231902.png?sv=2026-02-06&spr=https&st=2026-10-31T00%3A04%3A46Z&se=2026-10-31T01%3A04%3A46Z&sr=c&sp=r&sig=1jugzrGL9OBgIK8vBJsxKvLntDhmrD2gKAGRO9qOndY%3D)