Side by side
How the 04 compares to the two things people ask about
Alder 04Open frame kitsSealed units
Runs on the mains, no battery
Sensor swappable without tools
Calibration stored on the device
Readings leave as plain CSV
Housing rated for standing water
Firmware you can read
Filled means yes, open means it depends on the model, a dash means no. Measured on units we bought ourselves in March.