Hawk - Configure Keller PR26D I2C Temp/Pressure Sensor
Written by Cameron Everett
Updated at September 23rd, 2025
Table of Contents
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Please ensure to also read the below for full details on configuring Tasks and I²C Sensors for the Hawk
The PR26D sensor is a pressure sensor commonly used for tank level measurements.
3rd Party Sensor
As this is a 3rd Party sensor - the advice given below is general. Always check the product datasheet direct from the manufacturer. Specific guidance on installation and usage should be obtained directly from the manufacturer. The instructions below are based on a sensor tested at the time of article writing - things may change.
IO Card
Ensure a plug-in IO card with an I²C interface is fitted to the Hawk.
Wiring
| Keller PR26D | Agtech1 | Bluetooth+ |
| VCC (Black) | Hawk IO 5 | Hawk IO 7 |
| SCL (Yellow) |
Hawk IO 6 | Hawk IO 5 |
| SDA (Blue) | Hawk IO 4 | Hawk IO 6 |
| GND (White) | Hawk GND | Hawk GND |
Firmware
The AgTech1 card firmware should be set to 1.16, and the Bluetooth Card should be set to 1.6.
Parameters
I²C Action Parameters
- Select PR26D Pressure Sensor as the Sensor Type
- Choose an Analogue to write the values to (it will write 4 values).
- Leave everything else as 0.
Task Parameters
Ensure the I²C action you have configured above (Action 1 or 2) is set as an action of the task.
Output/Conversion
With the above parameters, the output would be:
| Value | Analogue | Units |
| Pressure | Analogue Offset Value | 0.001 bar |
| Temperature | Analogue Offset Value + 1 | 0.01°C |
| P-Mode | Analogue Offset Value + 2 | Details Below |
