The Festo SIEF-Q40S-PA-S-2L is a proximity detection switch from the SIEF series, used to sense the position of pneumatic actuators or moving machine elements without physical contact. It sits in the Limit and Proximity Switches category, subcategory Proximity Detection Switches.

Festo SIEF-Q40S-PA-S-2L Proximity Detection Switch, 0.15 kg
MPNSIEF-Q40S-PA-S-2L
Festo SIEF series, Proximity Detection Switch, order code SIEF-Q40S-PA-S-2L, weight 0.15 kg, current lifecycle stage.
$142.74Ref. price · indicative, final on quote
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Weight | 0.15 kgs |
Product details
MPN
SIEF-Q40S-PA-S-2L