L6188 Aquastat Immersion Thermostat

The L6188 Aquastats are primarily designed for application on water filled heating and hot water systems in domestic and commercial premises. The liquid filled temperature probe is designed to be inserted into a well in a heat exchanger or pipework. This ensures highly responsive temperature control. The L6188A are control thermostats with external control dial. The L6188B are control thermostats with tamper proof internal adjustment. The L6188C are limit thermostats with tamper proof internal adjustment and manual reset.



  • Fast thermal response
  • Easy wire terminals
  • Double insulated



  • External dial adjustment
  • Tamperproof adjustment
  • Manual reset limits
  • Direct mount or remote probe
  • Adjustable switching differential
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