OP-IHTDIGI is a digital immersion heater time switch. Programmable for either 24 hour or 7 day operation. The time is suitable for surface mounting. THE TIMER CONTROLS A VOLT-FREE CHANGEOVER SWITCH, WITH A RESISTIVE RATING OF 16 AMPERES. PRE-FITTED (REMOVABLE) LINK FOR MAINS SWITCHING.- General purpose Timeswitch for surface mounting- 24 Hour and 7 day programming- 16Amp resistive, 4 Amp inductive- Minimum setting: 1 minute- Not suitable for discharge or LED lighting without a contactor- 24 On/Off programmes- Volt free SPDT contacts (remove link)- Manual override fix on / timed / fix off / Random/ Countdown