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Differential Thermostat / Solar Water Heating Pump Controller Including Sensors

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Seller: Top-Rated Seller bomio (5.264) 100%, Location: Cheltenham, Ships to: Worldwide, Item: 272888518617 For sale we have a mini version of the REUK basic solar water heating pump controller (available here: Solar Pump Controller Circuit on the website). This controller is supplied with a pair of (non-waterproof) temperature sensors soldered to 100mm long leads. When used as a solar water heating pump controller, the first sensor is fitted to the outlet pipe of the solar heating panel, and the second sensor under the insulation on the side of the hot water tank. For any other differential thermostat applications - e.g. turning on a fan to drive warm air from a sunny conservatory into the rest of the house, the first sensor is to be located at the heat source, and the second sensor at the location to be heated. Whenever the first sensor is measured to be hotter than the second sensor, the output turns on - an output rated to supply up to 2 Amps. This output can be used to directly power a fan or pump rated below around 20W @ 12V, or connected across the coil of a relay if higher currents and/or other voltages are to be switched. The output remains on until the measured temperature difference between the two sensors has fallen by approximately 1 degree Celcius. This circuit board is just 50 x 50 x 15mm in size (2 x 2 x 0.6 inches). The pump controller requires a constant 12VDC power supply - i.e. it cannot be directly connected to a PV solar panel - it must be connected to a 12V battery or a 12VDC plug in mains power supply (rated at 100mA or higher depending on what you intend to switch with the thermostat). Note that the leads to the sensors can be extended by up to 10 metres, but the leads to the solar panel sensor should be longer than those to the hot water tank for best results. Details of the design on which this controller is loosely* based are provided here: Simple Solar Pump Controller together with information on some of the other solar pump controllers and differential thermostats which we produce.* this version does not have the two 10K potentiometers for calibrating the sensors for simplicity. The sensors read accurately to within 1 degree of each other even without it. NEW - Click on our 'See other items' link for alternative solar water heating pump controller versions including one supplied with waterproof temperature sensors suitable for use with swimming pools, jacuzzis, hot tubs, and any other solar heating application where there is a chance the sensors may get wet. Click here to visit the REUK Blog. Condition: New, Type: Solar Heaters, MPN: Does Not Apply, Brand:

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  •  Seller - 5.264+ items sold. 0% negative feedback. Top-Rated Seller! Ships on time with tracking, 0 problems with past sales.
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