Frequently Asked Questions
What is the SDE3-V1S-B-HQ4-2P-M8?
It is a digital vacuum pressure sensor designation corresponding to Festo manufacturer part number 540193. The reference product measures relative vacuum pressure and provides two PNP switching outputs.
Is this product manufactured by Festo?
The listing identifies the item as FOR FESTO, which does not establish that the supplied unit was manufactured by Festo. Confirm the actual manufacturer, markings and documentation before ordering.
What is the pressure measuring range?
The original Festo model measures from 0 to -1 bar, equivalent to 0 to -0.1 MPa or 0 to -14.5 psi. This is a vacuum measuring range.
Is this a vacuum sensor or a 0–10 bar pressure sensor?
It is the vacuum version with a -1 to 0 bar measuring range. The SDE3-D10S-B-HQ4-2P-M8 is a different model intended for a 0 to 10 bar positive-pressure range.
What power supply does the sensor require?
Festo specifies 15 to 30 VDC for the original SDE3-V1S-B-HQ4-2P-M8. Confirm the supply requirements of the supplied product before installation.
Does it have PNP or NPN outputs?
The referenced model has two PNP transistor outputs. It is not an NPN-output configuration.
What is the maximum switching output current?
The original Festo specification is 100 mA maximum. Confirm the actual supplied sensor's output rating before connecting external loads.
What electrical connector is used?
The reference sensor uses an M8 × 1 A-coded four-pin connector. A compatible mating cable is required unless included separately.
What pneumatic tubing size is required?
The QS-4 push-in connection is designed for compatible pneumatic tubing with a 4 mm outside diameter.
Does the sensor have a digital display?
Yes. The reference Festo model includes an illuminated LCD with pressure readings displayed in bar and yellow switching-status indication.
What is the environmental protection rating?
Festo specifies IP65 protection and an ambient operating temperature range of 0 to +50°C for the original model. Verify the corresponding ratings of the supplied item.
What should be checked before ordering?
Confirm the complete designation SDE3-V1S-B-HQ4-2P-M8, actual product manufacturer, compatibility with Festo article 540193, -1 to 0 bar measurement range, two PNP outputs, 15–30 VDC operating voltage, M8 four-pin connector, QS-4 pneumatic fitting, mounting configuration and the required accessories.