HYDAC HDA4746-A-250-000: identify part 908648 correctly
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HYDAC HDA4746-A-250-000 / 908648
HYDAC lists part 908648 as HDA 4746-A-250-000 with a 4 to 20 mA output, G1/4 process connection and a four-pole M12 x 1 electrical connection. Match both the model code and the numerical part number when replacing the sensor.
Use the numerical part number as a second check
| Item | What to check |
|---|---|
| Model | HDA 4746-A-250-000 |
| Output | 4 to 20 mA |
| Process connection | G1/4 |
| Electrical connection | Male M12 x 1, four-pole; mating connector is not supplied in the catalog configuration. |
Source: HYDAC HDA 4700 catalog, item 908648. Match the document to the full model and revision on your unit.
Include a readable photo of the pressure-range marking in the request. Copy the units exactly. Also record the pressure range configured in the PLC or display so the replacement can be checked against the existing scaling.
Check the pressure port and cable separately
A connector that physically screws onto the sensor still needs the correct wiring and supply arrangement. Compare the exact sensor pin assignment with the machine drawing before reconnecting it. Record whether the existing cable and mating connector will be reused or should be quoted separately.
For the hydraulic connection, send a photograph of the port and sealing arrangement. Give the operating fluid and temperature to the responsible engineer for a materials and seal check. Changing thread form or adding an adapter needs review; it should not be hidden inside a part substitution.
Separate a sensor request from a loop fault
- Record the displayed pressure and the circumstances in which the reading becomes wrong.
- Ask the maintenance team to distinguish the measured current from the pressure calculated by the controller.
- Include any existing loop-test results with the request, without treating an unexplained reading as proof of sensor failure.
- After replacement, document the pressure reference used and the resulting indication under the approved commissioning procedure.
What to send with the part number
A concise inquiry is: "HYDAC 908648, HDA4746-A-250-000, quantity [required]. Attached are the label, connector and process-port photos. Please confirm the model, range marking, condition and whether a mating cable is included."
Check the listed part
Use the 908648 listing and include the pressure-range label and connector photos with your inquiry.
Manufacturer references
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