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  2. Undertank heater - Wikipedia

    en.wikipedia.org/wiki/Undertank_heater

    Under Tank Heater (UTH), also called heating mat or heating pad, is a heating device created by the pet industry for husbandry of reptiles and amphibians.It is a flat piece of metal and plastic that provides a convenient and easy way to heat your reptiles, amphibian and even aquariums fish tanks.

  3. Aquarium heater - Wikipedia

    en.wikipedia.org/wiki/Aquarium_heater

    A typical glass-tube immersion style aquarium heater. An aquarium heater is a device used in the fishkeeping hobby to warm the temperature of water in aquariums. [1] Most tropical freshwater and marine aquariums are maintained at temperatures that range from 22 to 30 °C (72 to 86 °F). [1] [2] [3] The types include glass immersion heaters and ...

  4. Recirculating aquaculture system - Wikipedia

    en.wikipedia.org/wiki/Recirculating_aquaculture...

    Water is pumped through the filter, and ammonia is utilized by the bacteria for energy. In recirculating systems, daily water exchanges are commonly used to control nitrogen levels. Stable environmental conditions and regular maintenance are required to ensure the biofilter is operating efficiently. [citation needed]

  5. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    The unit controllers typically have analog and digital inputs that allow measurement of the variable (temperature, humidity, or pressure) and analog and digital outputs for control of the transport medium (hot/cold water and/or steam). Digital inputs are typically (dry) contacts from a control device, and analog inputs are typically a voltage ...

  6. Thyristor power controller - Wikipedia

    en.wikipedia.org/wiki/Thyristor_power_controller

    The controllers change their on-off ratio due to the degree of regulation. With a required output of 50%, the controller would switch off a full wave and a full wave in the pulse group mode. Only in the light of this situation, changes in output voltage fluctuate during mains voltage fluctuations. In fact, the operators have a subordinate ...

  7. Crankcase heater - Wikipedia

    en.wikipedia.org/wiki/Crankcase_heater

    The crankcase heater keeps refrigerant at a temperature higher than the coldest part of the system. A crankcase heater generally has the same electrical symbol as a resistor because it converts electricity directly into heat via electrical resistance. The resistance in the heater coil determines the heat it produces when voltage is applied. [1]

  8. Solar controller - Wikipedia

    en.wikipedia.org/wiki/Solar_controller

    The simplest solar controller circuit uses a comparator with two temperature inputs, one at the solar panel and one at the thermal store's heat exchanger, and an output to control the pump. Commercial controllers use a microprocessor usually with a LCD display and simple user interface with a few pushbuttons.

  9. Rachel Ward - Wikipedia

    en.wikipedia.org/wiki/Rachel_Ward

    In 2003, a portrait of Ward by artist Jan Williamson won the Packing Room Prize at the Archibald Prize competition. [10] In 2005, Ward was made a Member of the Order of Australia "for service to raising awareness of social justice through lobbying, mentoring and advocacy for the rights of disadvantaged and at-risk young people, and support for the Australian film and television industry".

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