Set your shift timings once. The controller sounds the correct OISD-117 compliant tone at the correct time, every day — with or without your operator.

The Oil Industry Safety Directorate (OISD) Standard 117 specifies mandatory distinct tone codes for different emergency types. Our automatic controllers implement these correctly — the right tone for the right event, every time.
| Event Type | OISD-117 Tone | Duration |
|---|---|---|
| Fire alarm | Wailing continuous | Until manually stopped |
| Disaster / evacuation | Wailing — 3 bursts | 3 × 15 seconds |
| All clear | Steady continuous | 30 seconds |
| Test | Steady — 1 burst | 15 seconds |
| Shift change | Steady continuous | 30 seconds |
Request compliance datasheet →
Share your shift timings and siren model. We'll configure the controller with your schedule and dispatch ready to connect.