Sensors & assets
Adding a DAQ
Registering a data-acquisition device — hardware specification fields.
A DAQ (data acquisition device) asset represents a data logger, signal conditioner, or gateway — hardware that reads or routes signals from sensors, rather than measuring a physical quantity itself. Create one via Assets → New Asset, asset type daq.
Unlike a sensor, a DAQ has a single hardware specification row instead of measurement channels:
| Field | Notes |
|---|---|
| DAQ type | data_logger / signal_conditioner / gateway / other |
| Input / output channels | Number of physical channels available. |
| Input / output signal types | e.g. 4-20mA, 0-10V, thermocouple, RTD. |
| Sampling rate (Hz) | Aggregate and per-channel. |
| ADC type & resolution (bits) | The analog-to-digital converter's characteristics. |
| Input voltage range | Min/max. |
| Input impedance (Ω) | |
| Noise floor (µV RMS) | |
| Dynamic range (dB) | |
| Synchronization support, clock source, time-sync precision, jitter | Relevant for multi-channel or multi-device synchronized acquisition. |
| Communication protocol, interface type | e.g. Modbus, Ethernet/IP, RS-485, USB. |
| Trigger modes |
A DAQ can be linked from a calibration record (daq_id) to document which acquisition
hardware was used to take the readings for that calibration event — useful when the same
sensor is read through different DAQs at different times and you want to know which
combination produced a given data point.