The SmartTimer solution is a highly advanced timing and thermal control solution.  
 
Features:  
 

• Extremely accurate time keeping by using a high quality DS3231 real time clock. 
   
• Internet time synchronisation to ensure accurate time.  
  
  
• WiFi connectivity for ease of access  
  
  
• Web control. The system is easily controlled via a website running on the device.  
  
  
• 30A / 250VAC relays for high power applications like geysers or pool pumps.  
  
  
• 20 programable timer settings.
  
  
• Each timer can be set with a desired target temperature (optional)  
  
  
• Away / Holiday mode. Skip all timers during the period you set when you are away.  
  
  
• E-mail alerts when issues are encountered such as loose wiring (optionally enabled)  
  
  
• Works with digital temperature probes based on DS18B20 or slightly less accurate alalog 10K NTC thermistors.  
  
  
• Overheat protection.  
  
  
• Probe break detection.  

​  
SmartTimer can be used as a control solution for various applications. Some uses include:  
 

• Geyser management  
  
  
• Pool pump management  
  
  
• Lighting controller  
  
  
• General purpose timer or switch  

 ​ 
Technical Parameters  
 

• Operating voltage 230VAC / 50HZ.   
  
  
• Main Relay contact rating 30AMP (Max 4KW).   
  
  
• Secondary relay contact rating 30AMP (Max 4KW). (optional)   
  
  
• Operating voltage range 160V – 250V AC.   
  
  
• Temperature setting ranges 25 – 84°C.   
  
  
• Maximum temperature 85°C.   
  
  
• Heat failure – when increase at a rate of less than 4°C per hour.   
  
  
• Thermal Cut-out 90° C   
  
  
• Temperature accuracy dependent on probe technology. NTC typically ~2%, DS18B20 typically ~0.5%   
  
  
• Temperature calibration setting   
  
  
• Temperature probe failure detection.   
  
  
• Temperature probe range for geyser is -30 to + 130° C.