This document describes the Römheld P8888 hydraulic-electronic pressure switch, featuring programmable switching points and optional analogue output for…
The Römheld P8888 is a hydraulic-electronic signal converter designed to provide electrical switching commands when preset pressure values are reached. It features two outputs: one freely programmable switching output and an optional analogue output, alarm output, or second switching output. The device includes a membrane keyboard for programming switching points, reset points, output logic, and time delays.
| Pressure range | 5 – 600 bar |
|---|---|
| Operating voltage | 12 ... 32 V DC |
| Switching outputs | 2 x pnp switching no/nc each 1 A |
| Accuracy | < ±0.1 % of the final value |
| Protection class | IP65 |
| Operating temperature | - 20 ... + 80 °C |
The Teach-In procedure stores a present pressure value by pressing a button, automatically calculating optimum switching and reset points.
Yes, the operating and display panel can be rotated by 350°, and the display itself can be rotated by 180°.
The maximum switching frequency is 125 Hz.