Festo PEVK-1/8 Pressure Switch 15027676 — Adjustable SPDT Pneumatic Pressure Sensor, 1/8" NPT

FESTO · PEVK SERIES · 1/8" NPT · SPDT 5A 250VAC · IP65 · IN STOCK

The Festo PEVK-1/8 (P/N 15027676) is a compact mechanical pressure / vacuum switch from Festo's well-known PEVK series. It is designed for pneumatic systems where a simple, rugged, electromechanical trip is preferred over a fully electronic transmitter. With a 1/8" NPT process port, an adjustable setpoint, and a SPDT contact rated 5 A at 250 VAC inside an IP65 housing, the 15027676 is widely used to confirm air pressure, vacuum, clamp force, and end-of-stroke on automated machinery — from Allen-Bradley-controlled assembly cells to Siemens SIMATIC-managed packaging lines. KOEED holds stock at our China sourcing base and ships worldwide.

1. Key Technical Specifications & Overview

The PEVK-1/8 is the smallest-port variant in Festo's PEVK family. It uses a spring-loaded diaphragm / piston mechanism that snaps an internal micro-switch at the setpoint pressure, giving clean, bounce-free dry-contact signals that can be wired directly into PLC discrete inputs — for example, the 1756-IB16IF or the 6ES7 321-1BL00 — without any signal conditioning. The full ledger of nameplate and operating data is captured in the table below.

2. Application Scenarios — Where the PEVK-1/8 Fits

The PEVK-1/8 is used wherever a binary pressure confirmation is needed inside an industrial-automation cell. It is a direct drop-in for any machine that has to prove a pneumatic condition before the next motion step is allowed. Common deployments across our nine core brands include:

• Pneumatic clamp pressure proving on CNC mills, lathes, and machining centers where the workpiece must be confirmed clamped before spindle start — typically wired to a Fanuc PMC or Mitsubishi MELSEC safety input.
• End-of-stroke detection on pneumatic cylinders feeding factory automation lines, replacing limit-switch installations that drift with vibration.
• Vacuum presence detection on pick-and-place grippers and vacuum-cup handlers in KEYENCE-vision-guided assembly cells.
• Air-pressure proving on Schneider Modicon-managed bottling, capping, and labeling lines where low pressure must drop the line to a safe state.
• Safety interlock on guarded doors and perimeter fences where stored pneumatic energy must be vented before access is permitted.
• Robot end-effector feedback on Yaskawa Motoman and Omron SCARA cells, providing a binary “gripped / not gripped” signal to the robot controller.
• Compressed-air supply monitoring on Panasonic FP-series panels inside pressure-sensor and pneumatic panels.
• Legacy machine retrofits on Allen-Bradley SLC 500 and PLC-5 cells where modern electronic transmitters are over-spec.

3. Integration & Wiring Notes

The PEVK-1/8 exposes a 3-pin SPDT dry contact: COM, NO, and NC. Wire COM to your 24 VDC sourcing supply, then wire either NO or NC to the PLC's discrete input, returning to 0 V on the same field common. The 5 A / 250 VAC rating means the switch can directly drive contactors, solenoid valves, indicator lamps, or PLC inputs without an interposing relay — a real cost saver on Siemens ET 200S and Allen-Bradley 1769-IQ16 racks.

For 24 VDC PLC integration, keep cable length under 30 m to stay well clear of industrial EMI. Where longer cable runs are unavoidable (across gantries, between machines, or to remote cabinets), use a shielded 3-conductor cable with the drain grounded at the panel end only. The PEVK-1/8 has no polarity on the contact side, so the same wiring diagram drops into Omron CP1, Mitsubishi MELSEC-Q, and Schneider Modicon M340 inputs without modification.

When the destination is an electronic pressure transmitter replacement, plan a one-line change: drop the 4–20 mA loop, install the PEVK-1/8, and patch the PLC tag from AI4_PRESSURE (analog) to DI4_PRESS_OK (discrete). Hysteresis — typically 10–20% of setpoint — must be added to your trip and reset thresholds. For ladder tuning help, try the free PLC Hex to Float Converter or the Modbus CRC Calculator on the KOEED toolset.

4. Installation & Commissioning Tips

Mount the switch with the process port vertical and the housing upright so condensate cannot pool on the diaphragm. Apply thread sealant suitable for pneumatic service — PTFE tape or anaerobic sealant — and do not over-tighten; the 1/8" NPT thread only needs 1.5 to 2 turns past hand-tight. For panel-mount brackets, use the slotted body and avoid gripping the diaphragm housing with pliers, which will crack the seal and void the IP65 rating.

After installation, energize the air supply and adjust the setpoint by turning the locking screw until the switch trips at the desired pressure. Always verify both the trip and reset points with a calibrated reference gauge; the mechanical differential is typically 10–20% of the setpoint, so account for hysteresis in your PLC program and in any safety-rated stop logic on Yaskawa MP-series controllers. The IP65 housing tolerates wash-down environments common in food, pharmaceutical, and Panasonic-built packaging lines.

If you are replacing an obsolete PNP-output electronic pressure sensor with the PEVK-1/8, remember that the new wiring is dry-contact only — confirm the PLC input card can be configured for a sourcing or sinking dry contact, or add a 1 mA sense resistor if the card is a voltage-sensing type. For obsolete and EOL situations where the original Festo equivalent is no longer available, browse the related PEVK-1/4 and PEVK-1/2 variants, or open the KOEED AI diagnostic tool for cross-reference and migration help.

5. Procurement, Warranty & Lead Time

The Festo 15027676 (PEVK-1/8) is held in KOEED's Hong Kong / Shenzhen sourcing network and is available for worldwide shipping. Send your part list — even a one-line BOM — to Moritta@KOEED.COM and our team will reply with availability and a quote within 24 hours on business days. For multi-line BOMs (typical retrofit or rebuild jobs), use the Create a Quote form so each line item is captured with quantity and target price.

KOEED sources across the full Festo PEVK family (PEVK-1/8, PEVK-1/4, PEVK-1/2), the EV / PEV / SPAU electronic transmitter families, and the wider pneumatics catalog (cylinders, valves, FRLs). If the exact part is not in live stock, our China sourcing specialists will locate it from authorized channels and confirm lead time before you commit. Stock status is updated on the real-time records page; for a one-off urgent need outside business hours, open the 24/7 AI diagnostic tool to fast-track a part-number match, or send a message through Contact Us and it will be picked up on the next business morning.

All KOEED shipments include a written authenticity statement and a 12-month functional warranty on industrial-automation spares. For larger projects that mix Festo with Allen-Bradley, Siemens, Mitsubishi, Omron, Fanuc, Schneider, Yaskawa, Panasonic, and KEYENCE parts, ask for a single consolidated shipment with one invoice and one airway bill — this is the standard KOEED workflow for EPC and system-integrator customers. Browse the full All collection index, or jump straight to the Festo collection for related part numbers.