The document is the operating instructions for the Jaquet AG ferrostat differential sensors FTG 1088.XX and EEx-approved types (atex) FTG 1088.XX
The FTG 1088.xx series are ferrostat differential speed probes that generate square‑wave signals proportional to rotary speed. They are suitable for use with a pole wheel and are available in explosion‑proof (Ex) versions certified to EN and ATEX standards.
The sheet lists electrical characteristics, environmental ratings, mechanical limits, and mounting requirements, and includes conformity declarations and type‑list details for each variant.
| Power supply | 5 V ±10 %, max. allowed 12 V |
|---|---|
| Current consumption | max. 16 mA |
| Signal output | square wave voltage, mark‑space approx. 1:1 |
| Frequency range | 5 Hz … 20 kHz |
| Protection rating | IP68 (head), IP67 (connection) |
| Operating temperature | -40 °C … +125 °C (non‑Ex version) |
| Insulation | galvanically separated (500 V/50 Hz/1 min) |
| Vibration immunity | 3 g in the range 4 … 100 Hz |
| Shock immunity | 20 g during 11 ms, half‑sine wave |
| Maintenance | No maintenance; sensors cannot be repaired |
The sensor operates from 5 Hz up to 20 kHz.
The head is rated IP68 and the connection is rated IP67.
No maintenance is required; the sensors cannot be repaired.
They comply with EN 50014, EN 50020, EN 1127‑1 and have EC‑type‑examination certificate ZELM 03 ATEX 0147X.